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
-
On Sale
Jims 6-Speed Transmission Rebuild Kit for Harley-Davidson FLHR Road King 2017-2021 1063
JIMS
MSRP: $672.40Now: $605.16Was: $672.40Transmission wear manifests as delayed shifts, grinding sounds, and loss of power delivery—issues that compromise both performance and reliability. The JIMS 6-Speed Transmission Rebuild Kit 1063...11040023- SKU:
- 11040023
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- TYPE:
- TRANSMISSION
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TRANSMISSION TYPE:
- 6 SPEED
MSRP: $672.40Now: $605.16Was: $672.40 -
On Sale
Jims 6-Speed Transmission Rebuild Kit for Harley Dyna 2006-2017 1067
JIMS
MSRP: $606.85Now: $546.17Was: $606.85Transmission failure means downtime, and downtime costs money. The JIMS 6-Speed Transmission Rebuild Kit 1067 gives you everything needed for a complete, professional-grade rebuild that restores your...11040006- SKU:
- 11040006
- Availability:
- Ships Same Business Day
- Weight:
- 3.69 LBS
- UNITS:
- KIT
- TRANSMISSION TYPE:
- 6 SPEED
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
MSRP: $606.85Now: $546.17Was: $606.85 -
On Sale
Jims 6-Speed Transmission Rebuild Kit for 1991-2005 Harley-Davidson Softail Models 1062
JIMS
MSRP: $348.55Now: $313.70Was: $348.55Transmission wear and internal degradation directly compromise power delivery and shift quality on your Softail. This comprehensive rebuild kit supplies all the critical internal components—gaskets,...11040010- SKU:
- 11040010
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- TRANSMISSION TYPE:
- 6 SPEED
- UNITS:
- KIT
MSRP: $348.55Now: $313.70Was: $348.55Qty in Cart: 0Quantity:Price:MSRP: $348.55Now: $313.70Was: $348.55Subtotal: -
On Sale
Jims Transmission Rebuild Kit for 1971-1975 Harley-Davidson FX Super Glide 33031-36
JIMS
MSRP: $479.05Now: $431.15Was: $479.05If your 1971-1975 FX Super Glide transmission is showing signs of wear or slippage, a rebuild is the most cost-effective path to restoring reliability and smooth shifting. The JIMS 33031-36 Rebuild...11040011- SKU:
- 11040011
- Availability:
- Ships Same Business Day
- Weight:
- 2.43 LBS
- PRODUCT NAME:
- REBUILD KIT
- TRANSMISSION TYPE:
- 4 SPEED
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
MSRP: $479.05Now: $431.15Was: $479.05 -
On Sale
JIMS 6-Speed Transmission Door Black 2007-2016 Harley-Davidson FLHX 2336
JIMS
MSRP: $469.40Now: $422.46Was: $469.40Stock transmission doors compromise shift precision and accelerate wear on your drivetrain through accumulated end play and shaft deflection. The JIMS 6-Speed Transmission Door eliminates these weak...11070357- SKU:
- 11070357
- Availability:
- Ships Same Business Day
- Weight:
- 3.75 LBS
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- MATERIAL:
- 6061 ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 8 HOLE
- PRODUCT NAME:
- TRAP DOOR
- TRANSMISSION TYPE:
- 6-SPEED
MSRP: $469.40Now: $422.46Was: $469.40 -
On Sale
Jims 5-Speed Transmission Rebuild Kit 1999-2006 FLH 1035
JIMS
MSRP: $414.70Now: $373.23Was: $414.70A transmission rebuild isn't just maintenance—it's the difference between smooth, predictable shifts and costly slippage under load. The JIMS 5-Speed Transmission Rebuild Kit 1035 gives you...11040004- SKU:
- 11040004
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TRANSMISSION TYPE:
- 5 SPEED
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
MSRP: $414.70Now: $373.23Was: $414.70 -
On Sale
Jims 6-Speed Transmission Rebuild Kit for Harley-Davidson Touring Models 2007-2016 1056
JIMS
MSRP: $619.80Now: $557.82Was: $619.80Transmission wear compounds over time, leading to slipping, delayed shifts, and potential catastrophic failure. The JIMS 6-Speed Transmission Rebuild Kit 1056 restores your Harley-Davidson touring...11040005- SKU:
- 11040005
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- REBUILD KIT
- TRANSMISSION TYPE:
- 6 SPEED
- UNITS:
- KIT
MSRP: $619.80Now: $557.82Was: $619.80 -
On Sale
Jims Transmission Rebuild Kit for 2007-2017 Harley-Davidson Softail Fat Boy 1068
JIMS
MSRP: $622.70Now: $560.43Was: $622.70Transmission wear and slippage rob your Fat Boy of power delivery and reliability on the road. The JIMS Transmission Rebuild Kit 1068 supplies all internal components needed to restore your 5-speed...11040007- SKU:
- 11040007
- Availability:
- Ships Same Business Day
- Weight:
- 3.50 LBS
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- TRANSMISSION TYPE:
- 6 SPEED
- UNITS:
- KIT
MSRP: $622.70Now: $560.43Was: $622.70 -
On Sale
Jims 5th Gear Mainshaft with Bearings and Seal for Harley-Davidson FLHR Road King 1994-1995 8296
JIMS
MSRP: $461.90Now: $415.71Was: $461.90A worn or failing mainshaft compromises shifting reliability and can accelerate wear throughout your transmission. The JIMS 5th Gear Mainshaft restores precise engagement and smooth power delivery,...11060036- SKU:
- 11060036
- Availability:
- Ships Same Business Day
- Weight:
- 2.39 LBS
- FEATURES:
- INCLUDES BEARINGS
- PRODUCT NAME:
- GEAR
- TRANSMISSION TYPE:
- 5 SPEED
- UNITS:
- EACH
- TYPE:
- MAIN DRIVE GEAR
- FEATURES:
- INCLUDES SEAL
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
MSRP: $461.90Now: $415.71Was: $461.90 -
On Sale
Jims Inner Primary Bearing Seal for Harley-Davidson Big Twin 1990-2006 8961
JIMS
MSRP: $17.75Now: $15.98Was: $17.75A failing inner primary bearing seal is one of the most common sources of oil weeping in Big Twin motors—and it's a problem that compounds quickly if left unaddressed. The JIMS 8961 replaces the...11200414- SKU:
- 11200414
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- BEARING KIT
- TYPE:
- INNER PRIMARY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $17.75Now: $15.98Was: $17.75 -
On Sale
Jims Mega Nut for 2007-2017 Harley-Davidson Touring and Softail Models 1733
JIMS
MSRP: $126.40Now: $113.76Was: $126.40Harley primary systems demand absolute security under load, and a failing pulley nut can cascade into catastrophic engine damage. The JIMS Mega Nut eliminates guesswork with precision-machined...12030012- SKU:
- 12030012
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- NUT
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- TYPE:
- PULLEY
MSRP: $126.40Now: $113.76Was: $126.40 -
On Sale
Jims 5-Speed Transmission Assembly 1970-1984 Harley-Davidson FLH Electra Glide 8028DS
JIMS
MSRP: $4,230.40Now: $3,807.36Was: $4,230.40If you're running a 1970-1984 Harley-Davidson FLH Electra Glide, transmission reliability directly impacts your ride quality and safety. The JIMS 5-Speed Transmission Assembly 8028DS delivers the...DS325777- SKU:
- DS325777
- Availability:
- Ships Same Business Day
- Weight:
- 35.31 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- TRANSMISSION ASSEMBLY
- RIDING STYLE:
- STREET
- TRANSMISSION TYPE:
- 5 SPEED
- STYLE:
- 4 SPEED CASE
- STYLE:
- STANDARD RATIO
- TYPE:
- TRANSMISSION ASSEMBLY
- STYLE:
- 5 SPEED
- UNITS:
- EACH
MSRP: $4,230.40Now: $3,807.36Was: $4,230.40 -
On Sale
Jims 5-Speed Transmission Assembly for Harley-Davidson 1970-1984 FLH 8028
JIMS
MSRP: $3,291.95Now: $2,962.76Was: $3,291.95If you're running a classic Harley FLH and want gear engagement that actually matches your engine's output, a quality 5-speed transmission isn't optional—it's essential. The JIMS 8028 delivers the...DS325778- SKU:
- DS325778
- Availability:
- Ships Same Business Day
- Weight:
- 35.44 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- TRANSMISSION ASSEMBLY
- RIDING STYLE:
- STREET
- STYLE:
- 5 SPEED
- TRANSMISSION TYPE:
- 5 SPEED
- STYLE:
- CLOSE RATIO
- UNITS:
- EACH
- STYLE:
- 4 SPEED CASE
- TYPE:
- TRANSMISSION ASSEMBLY
MSRP: $3,291.95Now: $2,962.76Was: $3,291.95Qty in Cart: 0Quantity:Price:MSRP: $3,291.95Now: $2,962.76Was: $3,291.95Subtotal: -
On Sale
Jims 6-Speed Overdrive Transmission for 1991-1999 Harley-Davidson Softail 8000C6
JIMS
MSRP: $3,964.00Now: $3,567.60Was: $3,964.00If you're running a 1991-1999 Softail and want meaningful gains in acceleration and highway cruising efficiency, the JIMS 6-Speed Overdrive Transmission is a direct bolt-in solution that delivers...DS325854- SKU:
- DS325854
- Availability:
- Ships Same Business Day
- Weight:
- 41.88 LBS
- PRODUCT NAME:
- TRANSMISSION ASSEMBLY
- RIDING STYLE:
- STREET
- SIXTH GEAR RATIO:
- 0.86:1
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- STYLE:
- OVERDRIVE
- TRANSMISSION TYPE:
- 6 SPEED
- STYLE:
- CLOSE RATIO
MSRP: $3,964.00Now: $3,567.60Was: $3,964.00 -
On Sale
Jims 5-Speed Close Ratio Transmission Assembly for 1990-1999 Harley-Davidson Softail 8004
JIMS
MSRP: $3,880.75Now: $3,492.68Was: $3,880.75If you're running a 1990-1999 Harley-Davidson Softail and demand crisp gear changes with reliable power delivery, the JIMS 5-Speed Close Ratio Transmission Assembly 8004 is engineered to deliver...11010029- SKU:
- 11010029
- Availability:
- Ships Same Business Day
- Weight:
- 38.50 LBS
- STYLE:
- 5 SPEED
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- CLOSE RATIO
- UNITS:
- EACH
- PRODUCT NAME:
- TRANSMISSION ASSEMBLY
- TRANSMISSION TYPE:
- 5 SPEED
- TYPE:
- TRANSMISSION ASSEMBLY
MSRP: $3,880.75Now: $3,492.68Was: $3,880.75 -
On Sale
Jims 6-Speed Overdrive Transmission for 1991-1999 Harley-Davidson Softail Models 8004C6
JIMS
MSRP: $4,313.40Now: $3,882.06Was: $4,313.40If you're pushing your 1991-1999 Softail to its limits, a worn transmission or inefficient gearing becomes your bottleneck. The JIMS 6-Speed Overdrive Transmission delivers the close-ratio...11010030- SKU:
- 11010030
- Availability:
- Ships Same Business Day
- Weight:
- 41.90 LBS
- MATERIAL:
- POLISHED ALUMINUM
- PRODUCT NAME:
- TRANSMISSION ASSEMBLY
- RIDING STYLE:
- STREET
- STYLE:
- CLOSE RATIO
- STYLE:
- OVERDRIVE
- TRANSMISSION TYPE:
- 6 SPEED
- UNITS:
- EACH
- SIXTH GEAR RATIO:
- 0.86:1
MSRP: $4,313.40Now: $3,882.06Was: $4,313.40Qty in Cart: 0Quantity:Price:MSRP: $4,313.40Now: $3,882.06Was: $4,313.40Subtotal: -
On Sale
Jims 6-Speed Right Side Drive Transmission for Harley Softail 1990-1999 8253
JIMS
MSRP: $4,986.95Now: $4,488.26Was: $4,986.95If you're running a 1990-1999 Softail and looking to maximize reliability on the street or strip, the JIMS 6-Speed Right Side Drive Transmission delivers the durability and engagement your bike...11010034- SKU:
- 11010034
- Availability:
- Ships Same Business Day
- Weight:
- 46.00 LBS
- FIFTH GEAR RATIO:
- 1.00:1
- FOURTH GEAR RATIO:
- 1.23:1
- SECOND GEAR RATIO:
- 2,21:1
- UNITS:
- EACH
- FEATURES:
- INCLUDES HYDRAULIC CLUTCH
- FIRST GEAR RATIO:
- 2.94:1
- PRODUCT NAME:
- TRANSMISSION ASSEMBLY
- SIXTH GEAR RATIO:
- 0.86:1
- TRANSMISSION TYPE:
- 6 SPEED
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STYLE:
- RIGHT SIDE DRIVE
- THIRD GEAR RATIO:
- 1,57:1
MSRP: $4,986.95Now: $4,488.26Was: $4,986.95Qty in Cart: 0Quantity:Price:MSRP: $4,986.95Now: $4,488.26Was: $4,986.95Subtotal: -
On Sale
Jims Kickstarter Shaft 1941-1947 FL 33096-54B
JIMS
MSRP: $118.45Now: $106.61Was: $118.45A worn or damaged kickstarter shaft compromises cold-start reliability and adds unnecessary friction to your ignition routine. The JIMS 33096-54B restores precise engagement and smooth operation,...DS196011- SKU:
- DS196011
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- PRODUCT NAME:
- KICKSTARTER SHAFT
- RIDING STYLE:
- STREET
- SIZE:
- STANDARD
- UNITS:
- EACH
- TYPE:
- 4-SPEED
MSRP: $118.45Now: $106.61Was: $118.45 -
On Sale
Jims 5-Speed Transmission Rebuild Kit 1991-1998 Big Twin 1021
JIMS
MSRP: $384.30Now: $345.87Was: $384.30A worn transmission doesn't just rob you of power—it compromises reliability when you need it most. The JIMS 5-Speed Rebuild Kit 1021 gives you everything required for a complete overhaul, restoring...DS325781- SKU:
- DS325781
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- UNITS:
- EACH
- TRANSMISSION TYPE:
- 5 SPEED
MSRP: $384.30Now: $345.87Was: $384.30 -
On Sale
Jims 6-Speed Overdrive Super Kit 8085
JIMS
MSRP: $3,090.80Now: $2,781.72Was: $3,090.80Extended highway cruising demands an engine that can breathe easy at sustained speeds, and the JIMS 6-Speed Overdrive Super Kit 8085 delivers exactly that. By dropping your engine RPM nearly 475 at...11030008- SKU:
- 11030008
- Availability:
- Ships Same Business Day
- Weight:
- 27.25 LBS
- FIRST GEAR RATIO:
- 2.94:1
- PRODUCT NAME:
- GEAR SET
- SIXTH GEAR RATIO:
- 0.86:1
- STYLE:
- CLOSE RATIO
- STYLE:
- OVERDRIVE
- TRANSMISSION TYPE:
- 6 SPEED
- RIDING STYLE:
- STREET
- UNITS:
- SET
MSRP: $3,090.80Now: $2,781.72Was: $3,090.80
