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
$247.95The original Müller Power Clutch, Replaces OEM inner and outer ramp assemblies, 45% easier clutch lever operation, Easy to install; no drilling or spacers needed, Made in Germany11300005- 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
$247.95The original Müller Power Clutch, Replaces OEM inner and outer ramp assemblies, 45% easier clutch lever operation, Easy to install; no drilling or spacers needed, Made in Germany11300004- 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
$371.95Clutch relief system adapted for hydraulic couplings of the Harley Davidson Twin-Cam and Milwaukee Eight models, 35% relief on Twin-Cam and 45% relief on Milwaukee Eight models, Mounted quickly and invisibly, Maintenance-free, Better meterability of the...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
$55.95Highly polished, stainless steel option for customizers of all types, The 1/4" blind allen-head design uses an o-ring to seal once tightened from the inside of the trans top cover, Neutral indicator light will no longer function once installed11050236- 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
$279.95TRASK COVER DERBY ASLT RAW11070686- SKU:
- 11070686
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
$279.95 -
TRASK Assault Derby Cover - Chrome TM-0041CH
TRASK
$279.95Billet machined T6061 aluminum with acrylic see-through window, Matches Assault series air cleaners and cam covers, Made in the U.S.A., Acrylic see-through window11070638- 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
$279.95Billet machined T6061 aluminum with acrylic see-through window, Matches Assault series air cleaners and cam covers, Made in the U.S.A., Acrylic see-through window11070639- 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
$279.95Billet machined T6061 aluminum with acrylic see through window, Matches Assault series air cleaners and cam covers, Made in the U.S.A., Acrylic see-through window11070640- 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
$279.95Billet machined T6061 aluminum with acrylic see through window, Matches Assault series air cleaners and cam covers, Made in the U.S.A., Acrylic see-through window11070641- 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
$279.95Billet machined T6061 aluminum with acrylic see through window, Matches Assault series air cleaners and cam covers, Made in the U.S.A., Acrylic see-through window11070642- 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
$399.95Billet cover is used when converting from a cable clutch to hydraulic clutch, Include an upgraded throw-out bearing; a must for big motors with a heavier clutch pull, Require the use of 11/16" bore master cylinder, Hydraulic clutch line must be purchased...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
$699.95Upgrades stock belt drive to chain drive, Heat treated and coated for added durability, Custom steel 51-tooth rear sprocket, Includes 25-tooth front sprocket, Sprocket ratios comparable to stock gearing, High-quality O-ring chain recommended, Requires...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
$178.95Heat-treated for added durability, Black anodized finished, Made in the U.S.A.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
$178.95Heat-treated for added durability, Black anodized finished, Made in the U.S.A.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
$279.95TRASK COVER DERBY ASLT CHROME11070684- SKU:
- 11070684
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
$279.95 -
TRASK COVER DERBY ASLT GLS BLK TM-0042BK
TRASK
$279.95TRASK COVER DERBY ASLT GLS BLK11070685- SKU:
- 11070685
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
$279.95 -
TRASK Assault Derby Cover - Gloss Black TM-0041BK
TRASK
$279.95Billet machined T6061 aluminum with acrylic see-through window, Matches Assault series air cleaners and cam covers, Made in the U.S.A., Acrylic see-through window11070637- 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
$469.95Strongly recommended for engines producing 100 horsepower or more, Easily handles engine builds in excess of 300 horsepower, Includes mounting bolts and lock tabs, Direct bolt-on replacement for the stock clutch basket, Hard-anodized finish for added...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
$469.95Strongly recommended for engines producing 100 horsepower or more, Easily handles engine builds in excess of 300 horsepower, Includes mounting bolts and lock tabs, Direct bolt-on replacement for the stock clutch basket, Hard-anodized finish for added...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
$699.95Designed to upgrade the stock belt drive to chain drive, The custom steel 54-tooth rear sprocket and Trask custom billet aluminum carrier are easy to install, Heat treated and coated for long lasting wear, Comes with high quality bearings and spacers,...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
