Professional Bench Prep: This assembly will be fully prepped, degreased, and thoroughly cleaned before shipment. All degraded orange gasket liner residue visible in the photos will be meticulously scraped and cleared away. The unit will arrive at your workbench completely clean and ready for immediate deployment.
Starter Actuator Mechanical Function: The starter actuator mechanism is mechanically fully functional, smoothly engaging in and out under manual bench testing.
Rubber Boot Condition: The external rubber protective boot on the starter assembly is currently ripped/torn. Due to this tear, the next owner will likely want to go through the boot assembly during final setup.
Platform Fitment Bounds: Direct performance factory plug-and-play drop-in maintenance replacement or custom chopper drivetrain safety overhaul core designed explicitly for standard left-side engine configurations on classic 1970 to early 1984 carburetor-equipped Harley-Davidson Shovelhead Big Twin models:
Harley Shovelhead FL Series (1970–Early 1984): Electra Glide (FLH / FLH Classic / FLHS) and Tour Glide 74ci & 80ci overhead-valve engines running 4-speed manual transmission gearboxes.
Harley Shovelhead FX Series (1971–Early 1984): Sturgis (FXB), Low Rider (FXS / FXSB), Super Glide (FX / FXE), and Wide Glide (FXWG) manual 4-speed platforms.
Condition Details: Rider-grade pre-owned takeoff condition. The structural steel dipstick blade, level notch markings, and top chrome dome cap are 100% solid, straight, un-warped, and completely rust-free. The flexible black rubber expansion bung is intact and holds its sealing taper. Displays typical light superficial cosmetic surface scuffs and trace oil halos from previous active field service as pictured. Cleaned up, dry, and ready to pop straight into your project tank neck.
Platform Fitment Bounds: Direct factory plug-and-play drop-in maintenance replacement designed explicitly to push directly into standard oil tank filler necks on classic 1982 to early 2003 carburetor-equipped Harley-Davidson Sportster (XL) models:
Harley Evolution Sportster Series (1986–2003): XLH883 Standard, XLH883 Hugger, XLH883 Deluxe, XL1200 Standard, XL1200C Custom, and XL1200S Sport models utilizing the traditional frame-side oil tank plug aperture.
Harley Ironhead Sportster Series (1982–1985): Late-era 1000cc overhead-valve models (XLH / XLCH / XLS / XLX) running the updated frame-neck oil container styles.
Condition Details: Great rider-grade pre-owned builder core condition. The cast aluminum cylinder head shell, external cooling fins, spark plug threads, and gasket surface tracks are 100% solid, straight, un-warped, and completely crack-free. The inner rocker arm branches pivot cleanly, and all pre-installed internal valves are un-bent and tightly seated. Displays an authentic field-served dark oil patina and typical light superficial cosmetic shop shading from uninstallation as pictured. Fully functional to clean up, touch up the ports, and drop straight into your active engine build.
Platform Fitment Bounds: Direct factory plug-and-play drop-in maintenance replacement or custom chopper engine safety rebuild core designed explicitly for the front cylinder position on standard 1986 to 2003 carburetor-equipped Harley-Davidson Evolution Sportster (XL883) models:
Sportster XL883 Series (1986–2003): XLH883 Standard, XLH883 Deluxe, XLH883 Hugger, and XL883C Custom models factory-equipped with original 883cc top ends.
Note: Designed strictly for the front engine position matching casting limit 16663-86B; please check your rear cylinder layout independently to ensure proper pair configuration.
Platform Fitment Bounds: Direct factory maintenance drop-in replacement or engine safety rebuild component designed explicitly for standard original equipment cam chest architectures on 1999 to 2006 carburetor or fuel-injected (EFI) Harley-Davidson Twin Cam 88 (88ci / 1450cc) and select Twin Cam 95 big-twin motorcycle models:
1999–2005 Harley-Davidson Dyna Glide Generations (Super Glide FXD, Low Rider FXDL, Wide Glide FXDWG)
2000–2006 Harley-Davidson Softail Series (Fat Boy FLSTF, Heritage Softail Classic FLSTC, Softail Standard FXST, Night Train FXSTB)
1999–2006 Harley-Davidson Touring Series (Road King FLHR, Electra Glide FLHT, Street Glide FLHX, Road Glide FLTR)
Note: Fits standard early-style splined mainshaft pump layouts running original cam plates; does not fit late 2006-up Dyna or 2007-up high-output 96ci/103ci engines running the hydraulic-upgrade style oil pump housings (#26277-06)
Pricing Justification: This profile view explicitly clarifies that you are selling the complete internal oil pump gerotor gear set matrix nested cleanly inside the factory casing cavity. Mechanics building custom performance bikes or replacing scored oil pumps frequently seek out clean, un-scored original OEM Harley-Davidson Twin Cam oil gears to drop right back into an active project to avoid high dealer costs. Because a brand-new aftermarket equivalent replacement set carries a steep catalog baseline premium, listing this complete, ready-to-bolt-on used assembly lot right at $34.95 establishes an excellent value bargain across e-commerce search engine indexes, capturing high storefront sales velocity.
Platform Fitment Bounds: Direct performance drop-in maintenance upgrade or safety fuel induction tuning hardware designed for early style vintage performance carburetors running on 1966 to 1984 Harley-Davidson Shovelhead, Ironhead Sportster, and custom retro custom chopper V-Twin configurations:
Fits early S&S Cycle Super B gas fuel carburetors and select custom vintage link-pin induction bodies utilizing a bottom-plug variable jet layout.
Highly favored by vintage hot rod chopper mechanics running straight-pipe exhaust setups who require infinite mid-range to high-rpm fuel mixture adjustability on the fly.
Up for sale is a genuine, original equipment manufacturer (OEM) Harley-Davidson Electric Start Jackshaft Pinion Gear Drive Shaft Assembly (Factory Part Reference: #31482-70 / #31443-65A). Sourced straight from a vintage teardown, this drivetrain core includes the original main starter shaft, integrated center guide collar, spring-loaded overrunning bendix clutch style starter drive gear, and the final drive pinion wheel as pictured.
Brand: Harley-Davidson (Genuine Factory Original Equipment Manufacturer Core)
Component Type: Electric Kickstart / Starter Motor Bendix Jackshaft Assembly
Total Kit Volume Sizing: 1-Piece Single Mechanical Powertrain Core
OEM Factory Part Equivalents: 31482-70 / 31443-65A / 31465-65
Material Base: Case-hardened structural SCM bearing steel alloy.
Country of Origin: Made in the U.S.A.
Condition Details: Vintage pre-owned condition showing visible mechanical wear/damage on the splined input shaft section. While the bendix gear teeth, center collar, and final drive pinion remain solid with smooth rotation, the splined engagement end has localized marring/defects as pictured. The spring return mechanism is firm. This unit is sold strictly as a repairable core assembly, ideal for parts salvage, component swapping, or a custom chopper mock-up project.
Platform Fitment Bounds: Direct factory drop-in maintenance replacement or custom chopper drivetrain core for traditional electric-start inner primary configurations running on 1965 to 1985 Harley-Davidson 4-speed manual Big Twin models:
1965–1984 Electra Glide / Classic Models (FL / FLH / FLHF / FLHTC / FLHX)
1971–1984 Super Glide Electric Start Series (FXE / FXEF / FXS Low Rider)
1980–1985 Wide Glide 4-Speed Manual Assemblies (FXWG)
Unlike stock assemblies that allow the outer clutch hub to move laterally under heavy load, this heavy-duty performance retainer locks the clutch shell squarely in place over a standard 3-finger stud layout. By keeping the clutch drum firmly positioned, it creates uniform clearance between the friction and steel plates during lever compression. This positive-alignment configuration drastically reduces annoying clutch drag, eliminates hot-in-gear creeping, and improves your ability to find neutral effortlessly, shielding your gearbox components from excessive shifting stress and protecting your primary drive casing from terminal structural wear on the road.Product Specifications & Engineering Parameters:
Brand: Twin Power (Premium High-Performance Aftermarket Drivetrain Core)
Component Type: 3-Stud Clutch Hub Basket Retainer / Stabilizer Plate Kit
Total Kit Volume Sizing: Complete Single-Hub Overhaul Pack (Includes Retainer Disc + 3 Snap Rings)
Manufacturer Component Code: 484011
Distributor Catalog Code: BC 484011 / MFG# 30-004
Primary Compatibility Bounds: Engineered for classic chain or belt drive primary layouts featuring 3-finger stud clutch hubs.
Country of Origin: Product of USA
Platform Fitment Bounds: Direct factory maintenance upgrade or replacement performance stabilizer for traditional 3-stud clutch hub assemblies running on 1941 to early 1984 Harley-Davidson 4-speed and 5-speed Big Twin manual models:
1941–1947 Knucklehead (EL / FL / U / UL)
1948–1965 Panhead (FL / FLH / Duo-Glide / Electra Glide)
1966–1984 Shovelhead Alternator & Generator Big Twins (FX / FLH / FXE / FXWG / FXS / FXR)
1984 early Evolution Big Twin 4-Speed Manual Transmission Models
Premium Vintage Factory Upgraded Fastener Parts — Powersports Inventory Vault
Platform Fitment Bounds: Direct factory drop-in maintenance upgrade or replacement safety retaining rings for standard original Evolution and Twin Cam exhaust setups on 1984 to 2020 Harley-Davidson models:
1984–1999 Evolution Big Twin (Softail / Dyna / Electra Glide / Tour Glide)
1999–2017 Twin Cam 88 / 96 / 103 / 110 (Fat Boy / Street Bob / Road King / Ultra Classic)
1986–2020 Evolution Sportster (XL883 / XL1200 / Iron / Forty-Eight / Nightster)
Up for sale is a brand new, New Old Stock (NOS) Midwest Motorcycle Supply Exhaust Pipe Flange Retaining Ring Clip 8-Pack Bundle (Part Number: #701937 / Replaces Harley-Davidson OEM: #65325-83). Safely preserved and factory-sealed inside its original distributor packaging layout, this high-grade exhaust service lot includes eight (8) authentic round-wire split steel retaining rings.Unlike worn-out or heat-fatigued clips that can lose their spring tension and cause catastrophic header movement, these heavy-duty steel rings feature a precise mechanical diameter engineered to snap flush into your exhaust pipe header grooves. Once seated behind the exhaust flange, they provide a reliable, uniform positive-lock configuration against the flange nuts. This setup maintains a stable compression seal across the exhaust port gasket, shielding your cylinder head threads from stripping and protecting your engine from terminal exhaust leaks on the road.Product Specifications & Engineering Parameters:
Brand: Midwest Motorcycle Supply / Ultima (Premium High-Performance Aftermarket Restoration Core)
Component Type: Exhaust Pipe Flange Retaining Ring Clip Washer
Total Kit Volume Sizing: 8-Piece Mechanical Lot (Pkg. Qty: 8-Pack)
Manufacturer Component Code: 701937
OEM Factory Part Equivalent: Harley-Davidson #65325-83 / #65325-83A
Material Base: Heat-treated spring steel alloy built for optimal resilience and thermal cycle resistance under extreme exhaust temperatures.
Country of Origin: Product of USACondition Details: Pristine New Old Stock (NOS) condition. Every single one of the 8 mechanical split rings is 100% clean, rust-free, unhandled, un-torqued, and sealed tight inside the original branded distributor white hang pouch as pictured.
Vintage Made-in-USA Performance Stock — Powersports Inventory Vault
Up for sale is a brand new, New Old Stock (NOS) Eastern Motorcycle Parts 4-Speed Transmission Main Drive Gear Spacer (Part Number: #35070-80 / Replaces Harley-Davidson OEM: 35070-80). Safely preserved and factory-sealed inside its original vintage yellow distributor bag packaging from Blackville, South Carolina, this high-grade internal transmission service component features precision-machined, case-hardened steel construction. It is engineered to replace grooved, worn, or leaking original factory spacers to restore a perfect sealing surface for the main drive gear oil seal.
Product Specifications & Engineering Parameters:
Brand: Eastern Motorcycle Parts (Authentic Made-in-USA Quality Core)
Component Type: Transmission Main Drive Gear / Sprocket Spacer Sleeve
Eastern Parts Catalog Code: 35070-80
OEM Factory Part Number Cross-Reference: #35070-80 (3507080)
Platform Fitment Bounds: Direct factory drop-in replacement configuration for standard 4-speed manual transmissions on 1980 to 1984 Harley-Davidson Big Twin models (Late Shovelhead & early Evolution 4-speed configurations):
1980–1984 Shovelhead / Early Evo FLH / FL / FX / FXE / FXWG / FXST
Exclusions: Built strictly for the specific fitment boundaries of 1980–1984 4-speeds. Will NOT fit early 1936–1979 4-speed main drive gears or 5-speed transmission mainshafts.
Condition Details: Pristine New Old Stock (NOS) condition. The precision-ground outer sealing diameter, flat thrust boundaries, and internal mainshaft slider tracks are 100% clean, fresh, unhandled, uncompressed, dry, and sealed tight inside the original vintage branded plastic layout pouch as pictured.
Vintage Factory Transmission Shifting Internals — Lifestyle Powersports Performance Vault
Up for sale is a genuine, Harley-Davidson Factory OEM 4-Speed Transmission Ratchet Top Shifter Internals Rebuild Lot. Sourced from clean vintage teardowns, these internal mechanical components are preserved in solid used, original factory condition. Instead of trying to hunt down hard-to-find individual springs, indexing wheels, and matching pawls across swap meets, this bundled repair package contains the core components needed to rebuild a sloppy or slipping ratchet-style shifting lid.
Product Specifications & Mechanical Parameters:
Brand: Harley-Davidson (Original Equipment Manufacturer - 100% Genuine OEM Parts)
Component Type: Transmission Shifter Lid Internal Mechanism Rebuild Lot
Master Engineering Cross-Reference Group: Built around factory base numbers #34063-36, #34067-36, and #34515-52
Platform Fitment Bounds: Direct factory drop-in replacement for standard 4-speed manual ratchet-top foot-shift or hand-shift gearboxes on 1936 to 1979 Harley-Davidson Big Twin models:
1936–1947 Knucklehead (FL / EL)
1948–1965 Panhead (FL / FLH / Duo-Glide / Electra Glide)
1966–1979 Shovelhead Alternator & Generator 4-Speeds (FX / FLH / FXE / FXWG)
Exclusions: Will NOT fit late 1979–1986 "Cowpie" / rotary-top 4-speeds or late-model 5-speed Evolution transmissions.
Included Components in this Listing Bundle:
Two (2) OEM Internal Ratchet Shifting Indexing Gears
Two (2) OEM High-Tensile Coiled Ratchet Shifter Return Springs
Five (5) Matched OEM Shifting Pawls and Internal Alignment Guide Arms
Condition Details: Clean used vintage builder stock. The multi-tooth indexing edges on the shifting gears show sharp, uniform engagement profiles with no flattened corners or chipped valleys. The heavy return spring coils hold solid memory tension boundaries with no fractures. The stamped steel shifting pawls and alignment guides are straight and free of twists, showing a standard light natural metal aging/patina from dry garage storage as pictured, ready to clean up and install.
Vintage Factory Drivetrain Internal Stock — Lifestyle Powersports Inventory Vault
Up for sale is a genuine, Harley-Davidson Factory OEM 4-Speed Transmission Clutch Pushrod Throw-Out Bearing Cup. Sourced from a clean warehouse layout, this precision-ground structural steel component is preserved in solid used, original factory condition. Unlike cheap aftermarket reproduction drivetrain pieces that soften or distort under heat, this authentic factory forging features case-hardened steel to ensure perfectly concentric pushrod alignments and prevent internal clutch lever drag or chatter.
Product Specifications & Mechanical Parameters:
Brand: Harley-Davidson (Original Equipment Manufacturer - 100% Genuine OEM)
Component Type: Clutch Release Pushrod Oil Slinger / Throw-Out Bearing Cup [1]
OEM Factory Suffix Part Number: #37310-39 (Cross-references to factory parts schematic entry #40324-70 and V-Twin Mfg #17-0145) [1]
Platform Fitment Bounds: Direct factory drop-in replacement configuration for standard 4-speed manual ratchet top, rotary, and tank-shift gearboxes on 1939 to 1984 Harley-Davidson Big Twin models:
1939–1947 Knucklehead (FL / EL)
1948–1965 Panhead (FL / FLH / Duo-Glide / Electra Glide)
1966–1984 Shovelhead 4-Speed Transmission Cover Assemblies (FX / FLH / FXE / FXWG)
Condition Details: Clean used vintage builder stock. The internal bearing pocket bottom landing zone, structural conical body walls, and perimeter seating edges are square and true with zero flat spots, thinning, or mechanical gouges. The side access cutout window retains its factory-defined edges. The raw steel surfaces show standard light metal aging from dry garage storage as pictured, ready for immediate installation.
Premium Vintage Factory Upgraded Maintenance Parts — Powersports Inventory Vault
Up for sale is a brand new, New Old Stock (NOS) Biker's Choice Clutch Release Shaft and Finger Assembly Set (Part Number: #490604 / UPC: 887337168685). Safely preserved and factory-sealed inside its original plastic packaging layout, this high-grade transmission restoration bundle replaces worn, sloppy, or twisted original factory actuator rods inside the kicker side cover to restore precise, crisp clutch handlebar lever feedback and smooth out plate separation metrics.
Product Specifications & Engineering Parameters:
Brand: Biker's Choice (Premium Aftermarket Restoration Core Alignment)
Component Type: Transmission Kicker Cover Clutch Release Shaft & Actuator Finger Kit
Wholesale Distributor Identifier: 490604
Universal Product Code (UPC): 887337168685
Country of Manufacture: Made in Taiwan
Platform Fitment Bounds: Direct factory drop-in replacement or repair kit for original 4-speed hand-clutch or foot-clutch kickstart side covers on 1936 to early 1984 Harley Big Twin models:
1936–1947 Knucklehead (EL / FL)
1937–1948 Big Flathead (U / UL / ULH)
1948–1965 Panhead (FL / FLH / Electra Glide)
1966–early 1984 Shovelhead 4-Speed Gearboxes (FX / FXE / FLH / FXWG)
Exclusions: Built strictly for vintage 4-speed kickstart style actuator configurations. Will NOT fit late-1984 and later 5-speed Evolution transmissions or Sportster XL platforms.
Included Components in this Listing Pouch:
One (1) Precision-ground vertical clutch release shaft assembly
One (1) Hardened mechanical throwout release finger lever arm
One (1) Matched pack of retaining pins, washers, and installation hardware bits (sealed in separate inner wrap)
Condition Details: Pristine New Old Stock (NOS) condition. The structural steel shaft, polished release fingers, actuator cam sections, and internal hardware paths are 100% clean, fresh, unhandled, uncompressed, dry, and sealed tight under the original factory clear structural display film as pictured.
Premium Vintage Factory Upgraded Maintenance Parts — Powersports Inventory Vault
Up for sale is a brand new, New Old Stock (NOS) Twin Power Kickstarter Shift Gear Assembly (Part Number: #482984 / Replaces Harley-Davidson OEM: 33350-36 / MFG#: 292012). Safely preserved and factory-sealed inside its original protective VCI anti-corrosion oiled wrapper film packaging, this high-grade transmission component features precision-cut teeth manufactured to exact historical factory limits. It provides optimal face engagement and smoother contact patches during mechanical manual kickstarting sequences.
Product Specifications & Engineering Parameters:
Brand: Twin Power (Premium High-Performance Aftermarket Restoration Core)
Component Type: Transmission Kickstarter Side Cover Shift Starter Gear
Wholesale Distributor Identifier: 482984
Manufacturer Component Index: MFG# 292012
OEM Factory Cross-Reference: Harley-Davidson #33350-36
Country of Manufacture: Made in Taiwan
Material Base: Cold-forged, precision heat-treated carbon steel alloy built for maximum impact resistance and tooth longevity.
Platform Fitment Bounds: Direct factory drop-in replacement or manual kickstart conversion gear for standard 4-speed gearboxes on 1936 to 1984 Harley Big Twin models:
1936–1947 Knucklehead (EL / FL)
1937–1948 Big Flathead (U / UL / ULH)
1948–1965 Panhead (FL / FLH / Electra Glide)
1966–1984 Shovelhead Ratchet Top, Cowpie, & Rotary 4-Speeds (FX / FXE / FLH / FXWG)
Condition Details: Pristine New Old Stock (NOS) condition. Every single tooth profile, internal tracking spline shoulder, slider face ramp, and mating corner is 100% clean, fresh, unhandled, uncompressed, dry, and sealed tight inside the original distributor barcoded hang package as pictured.
Premium Aftermarket High-Performance Drivetrain — Inventory Vault
Up for sale is a brand new, New Old Stock (NOS) Belt Drives, LTD. EV-180 Splined Inner Clutch Hub Replacement Core (Part Identifier: #EV-180 / Cross-reference: 77340). Safely preserved and pristine inside its original factory VCI protective oiled wrapper, this high-performance American-made drivetrain component is precision-machined out of top-tier aircraft-grade billet aluminum alloy and finished in a rugged hard-anodized protective wear layer to effortlessly resist clutch plate notching or tooth chatter under intense V-Twin acceleration loops.
Product Specifications & Mechanical Engineering Parameters:
Brand: Belt Drives, LTD. (100% Genuine American Quality Core)
Component Type: Open/Closed Belt Drive Primary Splined Inner Clutch Hub
Manufacturer Part Number (MPN): EV-180 (Cross-references Mid-USA #77340)
Core Sizing Matrix: Standard 10-Spline internal straight center bore configuration built to slide directly onto factory 5-speed transmission mainshaft geometries with tight, zero-play runout tolerances.
Platform Fitment Bounds: Engineered precisely as a drop-in replacement hub core for premium BDL open or enclosed primary belt drive basket kits (such as the EVO-8S series) running on 1990 to 2006 Harley-Davidson Big Twin models (Late Evolution & Twin Cam 88 powertrains):
1990–1999 Evolution Big Twin 80" (Softail / Touring / Dyna / FXR)
1999–2006 Twin Cam 88" 5-Speed Engines (FXST / FLST / FLH / FXD)
Included Attachment Setup: Features a pre-balanced steel splined multi-bolt center socket collar assembly anchored firmly via three high-tensile flush Allen head machine screws.(Missing Clip)
Condition Details: Pristine New Old Stock (NOS) condition. The outer hard-anodized drive tracking teeth are razor-sharp with absolutely zero notch ridges, shoulder wallowing, or tool marks. Internal spline tracking lines are square, crisp, and untwisted. Ready for immediate primary system mock-up or final assembly sequences.
Complete Loaded Primary Drivetrain Assembly — Lifestyle Powersports Performance Vault
Up for sale is a genuine, Harley-Davidson Factory OEM Big Twin 5-Speed Loaded Clutch Hub and Shell Assembly Kit (Built around master factory assembly number: #37707-90A / Replaces older index: #37707-90). Sourced from a clean warehouse layout, this entire used bundle comes completely assembled with all the vital internal drivetrain components you need to drop straight into your primary case.
Unlike empty bare baskets or stripped hubs that require buying separate plate packs, costly center bearings, and separate ring gears, this complete unit eliminates assembly guesswork and is ready for mockup or final install sequence.
Product Specifications & Mechanical Parameters:
Brand: Harley-Davidson (Original Equipment Manufacturer - OEM Performance Core)
Component Type: Transmission Clutch Shell Drum and Inner Hub with Full Internals Stack
Starter Ring Gear Sizing: 102-Tooth (102T Profile designed to mesh with 1989-1993 standard 9-tooth starter jackshaft pinion gears).
OEM Factory Master Assembly Reference: #37707-90A (replaces legacy index #37707-90)
Inner Hub Core Style: Modern 5-speed straight splined center bore (slides directly onto splined transmission mainshafts).
Platform Fitment Bounds: Direct factory drop-in replacement for standard 5-speed diaphragm clutch assemblies on 1990 to 1993 Harley-Davidson Big Twin Evolution models:
1990–1993 Softail (Fat Boy FLSTF / Heritage FLSTC / Custom FXSTC / Springer)
1990–1993 Touring (Electra Glide FLHT / Ultra Classic FLHTCU / Tour Glide)
1991–1993 Dyna Glide (Super Glide FXD / Low Rider FXDL / Wide Glide FXDWG)
1990–1993 FXR Series (Super Glide FXR / Low Rider FXRS / Sport Glide)
Exclusions: Will NOT fit early 1980–1989 5-speed setups (which use a totally separate starter engagement mechanism) or 1994–2006 models, which switched to a different pitch 102-tooth ring gear optimized for a 10-tooth starter pinion configuration.
Included Components in this Listing:
One (1) OEM 5-Speed Outer Clutch Shell Basket with pre-pressed center bearing
One (1) OEM 102T Starter Ring Gear and Duplex Primary Chain Driven Sprocket
Internal Splined Inner Clutch Hub Core
Complete matched internal stack of used Friction Clutches & Steel Drive Plates (would replace)
One (1) Mainshaft Clutch Hub Retention Locknut
Condition Details: Solid used builder stock. The teeth on the rear primary drive duplex sprocket and the 102T starter ring gear show sharp, even profile trajectories with zero flat spots or rolled metal lines. Internal spline channels matching the transmission shaft are square and crisp. The aluminum outer fingers and inner plate tracking splines show typical light, uniform wear consistent with normal operation and are free of deep gouging or notch ridges. Coated in a light preservation layer of storage oil to shield against warehouse humidity.
High-Performance Aftermarket Drivetrain Systems — Powersports Inventory Vault
Up for sale is a genuine, Rivera Primo Pro-Clutch 1.75-Inch Belt Drive Primary Pulley, Hub, and Installation Hardware Assembly Kit (Built around performance catalog core numbers: #1056-0005 / PC-1200-CA). Sourced from a professional builder collection, this premium American-made conversion package remains in excellent used garage-stored condition. Engineered specifically to convert standard high-friction chain configurations over to an ultra-smooth, lightweight performance belt drive setup, this Pro-Clutch systemprovides a significantly larger friction surface footprint to effortlessly handle high-horsepower Evolution engine outputs.
Product Specifications & Mechanical Parameters:
Brand: Rivera Primo Engineering (100% Genuine Made in USA Performance Core)
Component Type: Combined Primary Drive Motor Pulley, Pro-Clutch Hub, and Basket Assembly Group
Front Engine Pulley Tooth Count: 45-Tooth (45T Splined Shaft Style)
Rear Basket Pulley Tooth Count: 68-Tooth (68T Outer Pulley Ring Shell)
Platform Fitment Bounds: Direct performance upgrade bolt-on fitment for standard original 5-speed primary architectures on 1990 to 1997 Harley-Davidson Big Twin Evolution models:
1990–1997 Softail (Fat Boy FLSTF / Heritage FLSTC / Custom FXSTC / Bad Boy)
1990–1997 Touring (Road King FLHR / Electra Glide FLHT / Ultra Classic)
1991–1997 Dyna Glide (Super Glide FXD / Low Rider FXDL / Wide Glide FXDWG)
1990–1994 FXR Series (Super Glide FXR / Low Rider FXRS)
Included Components in this Listing Bundle:
One (1) OEM Rivera Primo Pro-Clutch Hub and 68T Basket Pulley Shell Assembly
One (1) OEM Rivera Primo 45T Front Engine Drive Motor Pulley
One (1) OEM Flanged Pulley Extension Guide Retainer Collar Cup
One (1) Heavy-Duty Crankshaft Alignment Shimming Backing Washer
Three (3) Heavy-Duty Threaded Hex Head Primary Standoff Fastener Screws
Condition Details: Clean used vintage performance stock. The machined aluminum belt grooves on both the front 45T and rear 68T pulley channels display straight, clean tracking parameters with zero wall distortion or teeth marring. Internal center splines matching the mainshaft are sharp, uniform, and completely untwisted. Clutch drive ears and adjustment fasteners are mechanically solid. Staged in a light preservation coating of storage oil to shield against rust or warehouse humidity.
Complete Loaded Primary Drivetrain Assembly — Lifestyle Powersports Inventory Vault
Up for sale is a genuine, Harley-Davidson Factory OEM Big Twin 5-Speed Loaded Clutch Hub Assembly Kit (Built around master factory core number: #37550-90A / Cross-references Milwaukee Twins #68-502 [1]). Sourced from a clean warehouse layout, this entire used bundle comes completely loaded with the vital internal drivetrain components you need to drop straight into your primary case.
Unlike empty bare hubs that require buying separate plate packs and costly small hardware pieces, this complete setup is ready for mockup or final install sequence.
Product Specifications & Mechanical Parameters:
Brand: Harley-Davidson (Original Equipment Manufacturer - OEM Performance Core)
Component Type: Transmission Clutch Hub Core with Full Friction Plate Stack & Hardware [1]
OEM Factory Hub Part Number: #37550-90A (replaces legacy index #37550-90) [1]
Inner Hub Core Style: Modern 5-speed straight splined center bore (slides directly onto splined transmission mainshafts).
Platform Fitment Bounds: Direct factory drop-in replacement for standard 5-speed diaphragm clutch setups on 1990 to 1997 Harley-Davidson Big Twin Evolution models:
1990–1997 Softail (Fat Boy FLSTF / Heritage FLSTC / Custom FXSTC / Springer) [1]
1990–1997 Touring (Road King FLHR / Electra Glide FLHT / Ultra Classic FLHTCU) [1]
1991–1997 Dyna Glide (Super Glide FXD / Low Rider FXDL / Wide Glide FXDWG) [1]
1990–1994 FXR Series (Super Glide FXR / Low Rider FXRS / Sport Glide) [1]
Exclusions: Will NOT fit early 1980–1989 5-speed setups (which utilize a tapered inner hub architecture) or 1998-later models which carry a different backing plate tracking depth.
Included Components in this Listing:
One (1) OEM 5-Speed Splined Clutch Hub Assembly [1]
Complete matched stack of used internal Friction Clutches & Steel Drive Plates
Factory internal Snap Rings / Circlips
One (1) OEM Hex Head Mainshaft Clutch Hub Locking Nut
Matching outer Clutch Pressure Plates
Condition Details: Solid used builder stock. The reinforced steel center hub studs and outer aluminum alignment splines display straight, clean tracking parameters with minimal notched wear. The internal mainshaft spline tracking grooves are sharp, clean, and completely untwisted. Clutch plates, snap rings, and pressure plates show typical light, uniform wear consistent with normal operation. Staged in a light protective layer of storage oil to shield against warehouse humidity.
Vintage Factory Primary Drive Stock — Lifestyle Powersports Inventory Vault
Up for sale is a genuine, Harley-Davidson Factory OEM 45" Flathead 23-Tooth Engine Primary Drive Motor Sprocket. Sourced from an early warehouse collection, this steel component remains in solid, used vintage condition. Unlike modern cheap, soft reproduction drivetrain components, this authentic factory-forged casting features high-grade, heat-treated steel to prevent tooth deflection or premature spline wear under heavy torque loads.
Product Specifications & Mechanical Parameters:
Brand: Harley-Davidson (Original Equipment Manufacturer - OEM)
Component Type: Engine Crankshaft Primary Drive Motor Sprocket
Sprocket Tooth Count: 23-Tooth (23T Style for Single-Row Primary Chains)
Bore Type: Tapered center shaft configuration with built-in woodruff keyway slot
Platform Fitment Bounds: Direct factory replacement for standard primary setups on 1929 to 1952 Harley-Davidson 45" Big Twin Flathead lines:
1929–1952 Harley WL / WLA / WLC / WLD / WR Solo Models
1929–1973 Harley G / GA Servi-Car Utility Platforms
Condition Details: Authentic used vintage stock with light surface flash rust/patina common to long-term dry garage storage. The 23 teeth show solid profile lines with plenty of material life left and zero sharp hooks or valley thinning. The critical internal tapered bore and keyway channel are sharp and free of spin marring or wallowing.
Premium Factory Primary Drive Stock — Lifestyle Powersports Inventory Vault
Up for sale is a genuine, Harley-Davidson Factory OEM Big Twin 24-Tooth Compensating Sprocket Assembly (Master Kit #40275-70). Sourced from a clean, low-mileage bike, these internal mechanical components are preserved in excellent used garage-stored condition. Unlike modern budget reproductions or brittle aftermarket variants, this original factory assembly utilizes correct spring-pack preload and heat-treated cam ramps to protect your crankshaft splines and smooth out heavy V-Twin firing impulses.
Product Specifications & Mechanical Parameters:
Brand: Harley-Davidson (Original Equipment Manufacturer - OEM)
Component Type: Engine Compensator Assembly / Primary Drive Extension Sprocket
Master Assembly Tooth Count: 24-Tooth (24T) Duplex dual-row primary chain style [2]
OEM Factory Part Number: #40275-70 (replaces historical index #40275-70A or #40275-70D)
Platform Fitment Bounds: Direct factory drop-in replacement for standard primary drive setups on 1970 to 2006 Harley-Davidson Big Twin models (Alternator Shovelhead, Evolution 80", and Twin Cam 88 5-Speed engines):
1970–1984 Shovelhead Alternator Models (FLH / FX / FXE / FXWG)
1984–1999 Evolution Big Twin 80" (Softail / Touring / Dyna)
1999–2006 Twin Cam 88" 5-Speed Platforms (FXST / FLST / FLH / FXD)
Exclusions: Will NOT fit early 1965–1969 Generator Big Twins, Sportster XL models, or 2006-later Dyna / 2007-later Touring and Softail 6-speed configurations which feature the completely redesigned bolt-on high-output splined compensator hubs.
Condition Details: Clean used garage stock. The slider cam ramp peaks show solid, uniform profiles with minimal pitting or grooving wear. The 24 teeth on the primary drive sprocket display clean lines with zero sharp hooks or chipped valleys. Internal splines matching the engine sprocket shaft are sharp and untwisted. Staged in light storage oil to shield against warehouse storage humidity.
