Harley Drivetrain
Harley Bike Drivetrain Parts at JJ Motorsports
Upgrade your Harley's drivetrain for smoother power delivery and reliability with components from JJ Motorsports. Our selection includes transmission mounting plates, offset sprockets, mechanical reverse kits, starter spacers, pulley spacers, and primary covers designed for heavy-duty use, easy bolt-in installation, and enhanced performance. Compatible with Big Twins, Softail, Dyna, and more, these parts feature chrome finishes, billet aluminum, and CNC-machined steel for corrosion resistance and custom fitment.
Shop trusted brands like Paughco for primary covers and PBI for sprockets. Explore related categories such as Harley engine parts for rebuilds or Harley suspension for balanced setups.
Top Harley Drivetrain Products
- PAUGHCO Transmission Plate - OE Type 4-Speed 218 – Heavy-duty steel for Big Twins with 4-speed transmissions.
- PBI Offset Transmission Sprocket - 22-Tooth 281-22 – CNC-machined chromoly steel with 0.750" offset for 530 chains.
- MOTOR TRIKE Mechanical Reverse Kit MTTR-0025 – Lightweight aluminum with electronic cut-off for easy parking.
- TERRY COMPONENTS Starter Spacer 779000 – Billet aluminum, 1-1/2" thick for longer starters.
- PINGEL Rear Pulley Spacer 62051 – Billet aluminum for wider tires up to 142mm.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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MUELLER MOTORCYCLE AG Power Clutch 120-20
MUELLER MOTORCYCLE AG
$247.95If you're tired of fighting a stiff clutch lever on every shift, the MUELLER Motorcycle AG Power Clutch 120-20 delivers a measurable 45% reduction in actuation effort—meaning smoother shifts and less hand fatigue during long rides or competition. As a...11300005- SKU:
- 11300005
- Availability:
- Ships Same Business Day
- Weight:
- 0.59 LBS
- PRODUCT NAME:
- CLUTCH RAMP
- MODEL:
- POWER CLUTCH
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- MECHANICAL
$247.95 -
MUELLER MOTORCYCLE AG Power Clutch 120-30
MUELLER MOTORCYCLE AG
$247.95If you're spending your ride fighting heavy clutch engagement, the MUELLER Motorcycle AG Power Clutch 120-30 delivers a measurable 45% reduction in lever effort—meaning less hand fatigue during long sessions and sharper throttle control when it matters...11300004- SKU:
- 11300004
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- MODEL:
- POWER CLUTCH
- RIDING STYLE:
- STREET
- TYPE:
- MECHANICAL
- UNITS:
- EACH
- PRODUCT NAME:
- CLUTCH RAMP
$247.95 -
MUELLER MOTORCYCLE AG Hydro Clutch - Twin Cam 120-50
MUELLER MOTORCYCLE AG
$371.95If you're running a Twin-Cam or Milwaukee Eight and want clutch actuation that responds exactly how you command it, hydraulic relief optimization is non-negotiable. The MUELLER MOTORCYCLE AG Hydro Clutch eliminates the vagueness and inconsistency of worn...11300415- SKU:
- 11300415
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- MODEL:
- HYDRO
- UNITS:
- EACH
- PRODUCT NAME:
- CLUTCH
- RIDING STYLE:
- STREET
- TYPE:
- HYDRAULIC
$371.95 -
NAMZ Neutral Switch Eliminator Plug NNSE-P01
NAMZ
$55.95If you're running a custom transmission setup or eliminating unnecessary wiring in your hot rod build, this neutral switch eliminator plug seals off the neutral safety switch opening cleanly—no exposed holes, no messy adapters. The stainless steel...11050236- SKU:
- 11050236
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- PLUG
- MATERIAL:
- STAINLESS STEEL
- TYPE:
- NEUTRAL SWITCH
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$55.95 -
TRASK COVER DERBY ASLT RAW TM-0042R
TRASK
$279.95A quality derby cover protects your engine's internal components from debris, moisture, and contamination while maintaining a clean, purposeful aesthetic. The TRASK raw finish offers a minimalist look that complements both stock and modified builds. This...11070686- SKU:
- 11070686
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
$279.95 -
TRASK Assault Derby Cover - Chrome TM-0041CH
TRASK
$279.95A derby cover does more than protect your engine—it's the first visual statement of your build's quality. The TRASK Assault Derby Cover combines precision CNC machining with a transparent acrylic window, letting you display internal engine components...11070638- SKU:
- 11070638
- Availability:
- Ships Same Business Day
- Weight:
- 2.76 LBS
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- COLOR/FINISH:
- CHROME
- MODEL:
- ASSAULT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$279.95 -
TRASK Assault Derby Cover - Raw TM-0041R
TRASK
$279.95A properly engineered derby cover protects your engine's internals from debris and moisture while maintaining the clean aesthetic of your build. The TRASK Assault Derby Cover delivers precision CNC-machined construction paired with a transparent acrylic...11070639- SKU:
- 11070639
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MODEL:
- ASSAULT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- RAW
$279.95 -
TRASK Assault Derby Cover - Gloss Black TM-0040BK
TRASK
$279.95A quality derby cover protects your engine's internal components from debris and contamination while maintaining a finished appearance in your engine bay. The TRASK Assault Derby Cover delivers precision-machined construction with practical visibility,...11070640- SKU:
- 11070640
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MODEL:
- ASSAULT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- GLOSS BLACK
$279.95 -
TRASK Assault Derby Cover - Chrome TM-0040CH
TRASK
$279.95A derby cover serves as more than cosmetic—it protects your top-end components from debris, moisture, and contamination while maintaining engine bay aesthetics. The TRASK Assault Derby Cover combines precision machining with functional design, giving you...11070641- SKU:
- 11070641
- Availability:
- Ships Same Business Day
- Weight:
- 2.11 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- MODEL:
- ASSAULT
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$279.95 -
TRASK Assault Derby Cover - Raw TM-0040R
TRASK
$279.95A quality derby cover protects your engine's internal components while maintaining the clean aesthetic your build demands. The TRASK Assault Derby Cover combines precision-machined construction with a transparent window, giving you real-time visibility...11070642- SKU:
- 11070642
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- MODEL:
- ASSAULT
$279.95 -
TRASK Clutch Actuator Cover - Black - Hydraulic TM-2039BK
TRASK
$399.95Converting to hydraulic clutch actuation eliminates cable stretch and inconsistent engagement, giving you precise, repeatable clutch feel lap after lap. The TRASK billet cover handles the conversion cleanly while the included upgraded throw-out bearing...11070407- SKU:
- 11070407
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- COLOR/FINISH:
- POWDER-COATED
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 6 HOLE
- RIDING STYLE:
- STREET
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- TRANSMISSION TYPE:
- 6-SPEED
- TYPE:
- TRANSMISSION SIDE
$399.95 -
TRASK Sprocket Conversion Kit - Harley TM-2903
TRASK
$699.95Belt-drive systems sacrifice durability and performance reliability for low maintenance—until now. The TRASK Sprocket Conversion Kit swaps your stock Harley belt for a robust chain-drive setup, delivering superior load handling and proven longevity...12102458- SKU:
- 12102458
- Availability:
- Ships Same Business Day
- Weight:
- 9.20 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 25
- TOOTH COUNT:
- 51
- MATERIAL:
- 6061-T6 ALUMINUM
- TYPE:
- DRIVE
- UNITS:
- KIT
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- CONVERSION KIT
$699.95 -
TRASK Replacement Rear Sprocket - 54 Tooth TM-2901-3
TRASK
$178.95A worn or mismatched rear sprocket directly impacts your bike's acceleration, top-end speed, and overall driveline efficiency. The TRASK 54-tooth replacement restores OEM performance while delivering the durability needed for consistent track or trail...12102493- SKU:
- 12102493
- Availability:
- Ships Same Business Day
- Weight:
- 3.65 LBS
- TOOTH COUNT:
- 54
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- STREET
- TYPE:
- CONVERSION
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
$178.95 -
TRASK Replacement Rear Sprocket - 51 Tooth TM-2901-5
TRASK
$178.95A worn or mismatched rear sprocket directly impacts acceleration, top speed, and overall drivetrain efficiency. The TRASK 51-tooth replacement sprocket restores OEM performance characteristics while delivering the durability needed for track days and...12102494- SKU:
- 12102494
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- COLOR/FINISH:
- ANODIZED
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 51
- TYPE:
- CONVERSION
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
$178.95 -
TRASK COVER DERBY ASLT CHROME TM-0042CH
TRASK
$279.95A quality primary cover isn't just about aesthetics—it's about protecting your engine's internal components from contamination and moisture while maintaining a clean, finished appearance. The TRASK Derby Cover in polished chrome delivers robust...11070684- SKU:
- 11070684
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
$279.95 -
TRASK COVER DERBY ASLT GLS BLK TM-0042BK
TRASK
$279.95A derby cover isn't just about aesthetics—it's about protecting your engine's internals from debris, moisture, and contamination while maintaining a clean, finished appearance. The TRASK Derby Cover combines durable construction with a sleek black...11070685- SKU:
- 11070685
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
$279.95 -
TRASK Assault Derby Cover - Gloss Black TM-0041BK
TRASK
$279.95A quality derby cover protects your engine's internals from debris and moisture while maintaining the aggressive aesthetic of your build. The TRASK Assault Derby Cover delivers both functionality and style with precision-machined construction that...11070637- SKU:
- 11070637
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- MODEL:
- ASSAULT
- RIDING STYLE:
- STREET
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- COLOR/FINISH:
- GLOSS BLACK
$279.95 -
TRASK Twin Cam Clutch Basket TM-2013
TRASK
$469.95If your engine is pushing serious power—whether you're at 100 hp or well beyond 300—your stock clutch basket won't cut it. The TRASK Twin Cam Clutch Basket TM-2013 is engineered to handle aggressive builds and sustained high-load conditions without...11321005- SKU:
- 11321005
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- RED
- PRODUCT NAME:
- CLUTCH BASKET
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
$469.95 -
TRASK M8 Clutch Basket TM-2017
TRASK
$469.95If you're running a high-output engine or planning a serious power build, your stock clutch basket won't survive sustained abuse. The TRASK M8 Clutch Basket TM-2017 is engineered to handle the punishment of 300+ horsepower without slipping, chattering,...11321220- SKU:
- 11321220
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- COLOR/FINISH:
- GOLD
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- CLUTCH BASKET
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
$469.95 -
TRASK 530 Chain Drive Conversion Kit - 54-Tooth TM-2901
TRASK
$699.95Belt drives impose rpm limitations and can slip under extreme load—a chain drive conversion eliminates both constraints and delivers the direct power transfer serious racers demand. The TRASK 530 Chain Drive Conversion Kit upgrades your drivetrain with a...12101851- SKU:
- 12101851
- Availability:
- Ships Same Business Day
- Weight:
- 9.50 LBS
- TOOTH COUNT:
- 25
- TOOTH COUNT:
- 54
- TYPE:
- DRIVE
- MATERIAL:
- 6061-T6 ALUMINUM
- PRODUCT NAME:
- CONVERSION KIT
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- BLACK
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$699.95
