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
-
POWERSTANDS RACING Primary Chain Tensioner 12-02001-22
POWERSTANDS RACING
$222.95Proper primary chain tension is critical to engine longevity and performance—too tight and you're accelerating wear on bearings and sprockets, too loose and you risk chain slap and timing issues. The POWERSTANDS Racing Primary Chain Tensioner gives you...11200409- SKU:
- 11200409
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- CHAIN TENSIONER
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$222.95Qty in Cart: 0Quantity:Price:$222.95Subtotal: -
PRO-ONE PERF.MFG. Derby Cover - Ball Milled - Big Twin 203860
PRO-ONE PERF.MFG.
$126.45A derby cover serves as both protection and visual statement on your Big Twin engine. Pro-One's billet aluminum construction resists impact and corrosion while the ball-milled finish delivers a refined aesthetic that complements serious builds. This is...DS375747- SKU:
- DS375747
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- MILLENNIUM
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- STYLE:
- BALL-MILLED
- TYPE:
- DERBY
$126.45 -
PRO-ONE PERF.MFG. Clutch Actuator - Chrome - Hydraulic 202240
PRO-ONE PERF.MFG.
$252.95A hydraulic clutch actuator is essential for delivering consistent, smooth engagement and disengagement under racing conditions. The PRO-ONE PERF.MFG. unit combines precision-engineered billet aluminum construction with reliable hydraulic actuation,...202240- SKU:
- 202240
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- TYPE:
- HYDRAULIC
- PRODUCT NAME:
- CLUTCH ACTUATOR
- RIDING STYLE:
- STREET
$252.95Qty in Cart: 0Quantity:Price:$252.95Subtotal: -
PRO-ONE PERF.MFG. Derby Cover - Millennium 203850B
PRO-ONE PERF.MFG.
$126.45A derby cover protects your engine's internal components from debris, moisture, and contamination while maintaining clean aesthetics on your build. Whether you're running high-RPM street applications or track-focused setups, a quality billet cover...09401066- SKU:
- 09401066
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- MATERIAL:
- BILLET ALUMINUM
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- STYLE:
- SMOOTH
- MODEL:
- MILLENNIUM
- RIDING STYLE:
- STREET
- TYPE:
- DERBY
$126.45 -
PRO-ONE PERF.MFG. Derby Cover 203861B
PRO-ONE PERF.MFG.
$142.95A derby cover protects your engine's internal components from debris, moisture, and contamination while maintaining a clean, finished appearance on your crankcase. Whether you're running a high-revving engine on the track or keeping your build...11070626- SKU:
- 11070626
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- PRODUCT NAME:
- COVER
- PRODUCT NAME:
- DERBY COVER
- TYPE:
- DERBY
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- STYLE:
- SMOOTH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- MODEL:
- MILLENNIUM
$142.95 -
PRO-ONE PERF.MFG. Clutch Actuator - Black - Hydraulic 202240B
PRO-ONE PERF.MFG.
$252.95A responsive, precision-engineered clutch actuator is fundamental to smooth power delivery and driver control, especially in high-performance applications where consistency matters. The PRO-ONE PERF.MFG. Hydraulic Clutch Actuator delivers that...11070252- SKU:
- 11070252
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- TYPE:
- HYDRAULIC CLUTCH ACTUATOR
- RIDING STYLE:
- STREET
$252.95 -
MOTOR TRIKE Mechanical Reverse Kit MTTR-0123
MOTOR TRIKE INC
$1,595.95Reverse capability transforms your trike from street-only to genuinely practical—whether you're maneuvering in tight parking situations or repositioning for trail navigation. This clutch-operated system integrates seamlessly with your OEM setup without...11030023- SKU:
- 11030023
- Availability:
- Ships Same Business Day
- Weight:
- 7.14 LBS
- FEATURES:
- HYDRAULIC CLUTCH
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- MECHANICAL REVERSE KIT
- MATERIAL:
- ALUMINUM
- STYLE:
- REPLACEMENT
$1,595.95 -
MOTOR TRIKE Mechanical Reverse Kit MTTR-0023
MOTOR TRIKE INC
$1,495.95Adding reverse capability to your trike transforms parking and maneuvering from a frustrating multi-point effort into a single, straightforward operation. This clutch-operated system eliminates the strain of manual push-backs while preserving your...11030025- SKU:
- 11030025
- Availability:
- Ships Same Business Day
- Weight:
- 7.03 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- MECHANICAL REVERSE KIT
- UNITS:
- KIT
- FEATURES:
- STANDARD CLUTCH
- STYLE:
- REPLACEMENT
$1,495.95 -
MOTOR TRIKE Mechanical Reverse Kit MTTR-0024
MOTOR TRIKE INC
$1,495.95If you're operating a trike in tight spaces or need reliable reverse functionality without electrical strain, the MOTOR TRIKE Mechanical Reverse Kit MTTR-0024 eliminates the guesswork and risk of transmission damage. This clutch-operated system gives you...11030029- SKU:
- 11030029
- Availability:
- Ships Same Business Day
- Weight:
- 7.10 LBS
- STYLE:
- REPLACEMENT
- UNITS:
- KIT
- PRODUCT NAME:
- MECHANICAL REVERSE KIT
- FEATURES:
- HYDRAULIC CLUTCH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$1,495.95 -
MOTOR TRIKE Mechanical Reverse Kits MTTR-0122
MOTOR TRIKE INC
$1,595.95Reverse gears on three-wheelers demand mechanical reliability—this kit delivers exactly that without cutting corners on simplicity. The MOTOR TRIKE MTTR-0122 eliminates the guesswork of parking and maneuvering by giving you full reverse capability...11030024- SKU:
- 11030024
- Availability:
- Ships Same Business Day
- Weight:
- 7.10 LBS
- FEATURES:
- HYDRAULIC CLUTCH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- REPLACEMENT
- PRODUCT NAME:
- MECHANICAL REVERSE KIT
- UNITS:
- KIT
$1,595.95Qty in Cart: 0Quantity:Price:$1,595.95Subtotal: -
MOTOR TRIKE Mechanical Reverse Kit MTTR-0021
MOTOR TRIKE INC
$1,495.95Adding reverse capability to your trike transforms parking and maneuvering from a frustrating multi-point exercise into a single, confident motion—especially crucial in tight spaces where forward-only operation limits your usability. The MOTOR TRIKE...11030026- SKU:
- 11030026
- Availability:
- Ships Same Business Day
- Weight:
- 6.95 LBS
- FEATURES:
- STANDARD CLUTCH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- MECHANICAL REVERSE KIT
- UNITS:
- KIT
- STYLE:
- REPLACEMENT
$1,495.95 -
MOTOR TRIKE Mechanical Reverse Kit MTTR-0022
MOTOR TRIKE INC
$1,495.95Reverse gears on three-wheelers demand reliability and simplicity—two things the MOTOR TRIKE Mechanical Reverse Kit MTTR-0022 delivers without compromise. This clutch-operated system eliminates the complexity of electrical-dependent solutions, protecting...11030028- SKU:
- 11030028
- Availability:
- Ships Same Business Day
- Weight:
- 7.18 LBS
- FEATURES:
- STANDARD CLUTCH
- PRODUCT NAME:
- MECHANICAL REVERSE KIT
- STYLE:
- REPLACEMENT
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$1,495.95 -
MUELLER MOTORCYCLE AG Power Clutch - Right-Side Drive 120-40
MUELLER MOTORCYCLE AG
$247.95If you're tired of heavy clutch lever resistance eating into your control and endurance, the MUELLER Power Clutch delivers measurable relief without compromise. This German-engineered assembly replaces your OEM ramps with a superior mechanical advantage,...11300045- SKU:
- 11300045
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- MODEL:
- POWER CLUTCH
- RIDING STYLE:
- STREET
- TYPE:
- MECHANICAL
- UNITS:
- EACH
- PRODUCT NAME:
- CLUTCH RAMP
$247.95 -
MUELLER MOTORCYCLE AG Hydro Clutch - M8 120-60
MUELLER MOTORCYCLE AG
$371.95If you're running a Twin-Cam or Milwaukee Eight and want clutch engagement that responds exactly how you demand it, this hydraulic relief system eliminates dead zones and gives you the smooth, progressive modulation that separates confident riders from...11300416- SKU:
- 11300416
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MODEL:
- HYDRO
- UNITS:
- EACH
- TYPE:
- HYDRAULIC
- PRODUCT NAME:
- CLUTCH
- RIDING STYLE:
- STREET
$371.95 -
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
