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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On Sale
Belt Drives Ltd 11mm Belt Drive Kit for 1955-1964 Harley-Davidson FLH 47-31SK-2
BELT DRIVES LTD.
MSRP: $585.95Now: $527.36Was: $585.95Upgrade your classic ride with our top-of-the-line 11mm Belt Drive Kick Start Spline Shaft, designed specifically for models from 1955 to 1964. Crafted from hard anodized aluminum, this durable component ensures longevity and ease of maintenance, making...DS360108- SKU:
- DS360108
- Availability:
- Ships Same Business Day
- Weight:
- 8.90 LBS
- PRODUCT NAME:
- BELT DRIVE KIT
- COLOR/FINISH:
- ANODIZED
- UNITS:
- KIT
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $585.95Now: $527.36Was: $585.95 -
On Sale
Belt Drives Ltd 8mm 2in Primary Belt Drive Kit for 1955-1984 Harley-Davidson Kick Start Models 76-47-2S
BELT DRIVES LTD.
MSRP: $651.95Now: $586.76Was: $651.95Upgrade your motorcycle with the BELT DRIVES LTD. 8mm/2" Primary Belt Drive Kick Start Spline Shaft, designed for exceptional durability and performance. This kit includes everything you need for a seamless installation, ensuring your ride operates...DS360115- SKU:
- DS360115
- Availability:
- Ships Same Business Day
- Weight:
- 11.25 LBS
- PRODUCT NAME:
- BELT DRIVE KIT
- THICKNESS IMPERIAL:
- 5/16'
- UNITS:
- KIT
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 144
- WIDTH IMPERIAL:
- 2'
MSRP: $651.95Now: $586.76Was: $651.95 -
On Sale
Belt Drives Ltd 3" Front Pulley 47 Tooth for 1984-1989 Harley-Davidson Softail 47EV-3
BELT DRIVES LTD.
MSRP: $272.95Now: $245.66Was: $272.95Engineered for superior performance, the Front Pulley 3" 47EV-3 is precision machined from high-quality aluminum and finished with a hard anodized coating for enhanced durability. Proudly made in the U.S.A., this pulley is designed to optimize your belt...DS360122- SKU:
- DS360122
- Availability:
- Ships Same Business Day
- Weight:
- 3.40 LBS
- COLOR/FINISH:
- ANODIZED
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PULLEY
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 47
- TYPE:
- MOTOR SHAFT
MSRP: $272.95Now: $245.66Was: $272.95 -
On Sale
Belt Drives Ltd Clutch Springs 6 Pack for 1970-1978 Harley-Davidson FLH Electra Glide ECS-100
BELT DRIVES LTD.
MSRP: $25.95Now: $23.36Was: $25.95Enhance the performance of your BDL Belt Drive clutches with the ECS-100 Clutch Springs. Designed for durability and optimal engagement, these springs provide reliable operation under various conditions. Upgrade your clutch system for improved...DS360156- SKU:
- DS360156
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- CLUTCH
- UNITS:
- 6 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPRING
MSRP: $25.95Now: $23.36Was: $25.95 -
On Sale
Belt Drives Ltd 66T Starter Ring Gear for 1980-1984 Harley-Davidson FLT Tour Glide SG-1
BELT DRIVES LTD.
MSRP: $111.95Now: $100.76Was: $111.95The BDL Starter Ring Gear SG-1 is expertly designed for optimal performance with BDL Belt Drive clutches. This premium component ensures reliable engagement and efficient power transfer, enhancing the overall functionality of your motorcycle's drive...DS360157- SKU:
- DS360157
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- PRODUCT NAME:
- GEAR
- UNITS:
- EACH
- INSIDE DIAMETER:
- 187.3 MM
- TOOTH COUNT:
- 66
- TYPE:
- STARTER RING
- RIDING STYLE:
- STREET
MSRP: $111.95Now: $100.76Was: $111.95 -
On Sale
Belt Drives Ltd 66T Starter Ring Gear for 1970-1983 Harley-Davidson FLH Electra Glide SG-2
BELT DRIVES LTD.
MSRP: $125.95Now: $113.36Was: $125.95The BELT DRIVES LTD. Starter Ring Gear SG-2 is expertly engineered for optimal performance with BDL Belt Drive clutches. Designed for durability and precision, this ring gear ensures reliable engagement and smooth operation, enhancing the overall...DS360158- SKU:
- DS360158
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- STARTER RING
- INSIDE DIAMETER:
- 174.6 MM
- PRODUCT NAME:
- GEAR
- TOOTH COUNT:
- 66
MSRP: $125.95Now: $113.36Was: $125.95 -
THRASHIN SUPPLY CO. M8 - Derby Cover Finned - Chrome TSC-3017-3
THRASHIN SUPPLY CO.
$179.95Made from machined 6061 billet aluminum, Uses stock gasket and hardware, Made in America11070695- SKU:
- 11070695
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- DERBY COVER
- MATERIAL:
- 6061 BILLET ALUMINUM
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- UNITS:
- EACH
$179.95 -
THRASHIN SUPPLY CO. Derby Cover - Polished - Classic TSC-3000-2
THRASHIN SUPPLY CO.
$119.956061 billet aluminum construction, Includes gasket, Made in U.S.A.11070584- SKU:
- 11070584
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MATERIAL:
- 6061 BILLET ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- STYLE:
- CLASSIC
- UNITS:
- EACH
- MOUNTING STYLE:
- 3 HOLE
$119.95 -
THRASHIN SUPPLY CO. Derby Cover - Black - Classic TSC-3000-4
THRASHIN SUPPLY CO.
$119.956061 billet aluminum construction, Includes gasket, Made in U.S.A.11070585- SKU:
- 11070585
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 3 HOLE
- RIDING STYLE:
- STREET
- MATERIAL:
- 6061 BILLET ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- STYLE:
- CLASSIC
$119.95 -
THRASHIN SUPPLY CO. Derby Cover - Polished - Classic TSC-3010-2
THRASHIN SUPPLY CO.
$129.956061 billet aluminum construction, Includes gasket, Made in U.S.A.11070586- SKU:
- 11070586
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MOUNTING STYLE:
- 5 HOLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MATERIAL:
- 6061 BILLET ALUMINUM
- STYLE:
- CLASSIC
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$129.95Qty in Cart: 0Quantity:Price:$129.95Subtotal: -
On Sale
Belt Drives Ltd Clutch Pack for Harley-Davidson EV 1990-up ERCPS-100
BELT DRIVES LTD.
MSRP: $215.95Now: $194.36Was: $215.95Enhance the performance of your BDL Belt Drive clutches with the Clutch Pack EV/EVO/EVB ERCPS-100. Designed for durability and efficiency, this clutch pack ensures smooth engagement and optimal power transfer, making it an essential upgrade for any...11312455- SKU:
- 11312455
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- FRICTION PLATE SET
- TYPE:
- CLUTCH
- UNITS:
- SET
MSRP: $215.95Now: $194.36Was: $215.95 -
On Sale
Belt Drives Ltd Competitor Clutch Friction Plates 1970-1984 Harley-Davidson Touring FXR CC-100-CP
BELT DRIVES LTD.
MSRP: $173.95Now: $156.56Was: $173.95Upgrade your clutch performance with the BELT DRIVES LTD. Friction Plate CC-100-CP, designed for durability and efficiency. Manufactured in the U.S.A., this friction plate ensures a reliable fit for optimal power transfer and smooth operation. ...11313028- SKU:
- 11313028
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- PRODUCT NAME:
- FRICTION PLATE SET
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH
- FRICTION PLATE MATERIAL:
- ALUMINUM
- UNITS:
- SET OF 5
MSRP: $173.95Now: $156.56Was: $173.95 -
On Sale
Belt Drives Ltd Rear Drive Belt 128 Tooth 1 1/8 inch for Harley-Davidson Softail 1993 PCCB-128-118
BELT DRIVES LTD.
MSRP: $251.95Now: $226.76Was: $251.95Experience unmatched performance with the Premium Rear Drive Belt, crafted with advanced Gates carbon X3N material. This innovative design ensures superior durability and flexibility, making it an ideal choice for high-performance motorcycles. Engineered...12040123- SKU:
- 12040123
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- MATERIAL:
- X7N CARBON
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 1-1/8'
- PRODUCT NAME:
- BELT
- TOOTH COUNT:
- 128
- TYPE:
- DRIVE
- UNITS:
- EACH
MSRP: $251.95Now: $226.76Was: $251.95 -
On Sale
Belt Drives Ltd Ball Bearing Lock-Up Clutch Kit 1990-2025 Harley-Davidson BPP-600-CK
BELT DRIVES LTD.
MSRP: $317.95Now: $286.16Was: $317.95Enhance the performance of your existing clutches with the Belt Drives Ltd. Plate Press L/U 90. This innovative upgrade transforms your clutch system into a ball-bearing lockup design, ensuring superior engagement without increasing lever pull effort...11300297- SKU:
- 11300297
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
- PRODUCT NAME:
- PRESSURE PLATE
- TYPE:
- CLUTCH
- UNITS:
- KIT
- TYPE:
- LOCK-UP
- COLOR/FINISH:
- GRAY
- RIDING STYLE:
- STREET
MSRP: $317.95Now: $286.16Was: $317.95 -
On Sale
Belt Drives Ltd Kevlar Clutch Kit for 1970-1984 Harley Davidson FLH Electra Glide BTX-5
BELT DRIVES LTD.
MSRP: $199.95Now: $179.96Was: $199.95Enhance your vehicle's performance with the BTX-5 Clutch Kit, designed for superior engagement and durability. Featuring wider clutch plates for improved holding power, this kit ensures effortless installation with pre-set stack height. Proudly made in...11311801- SKU:
- 11311801
- Availability:
- Ships Same Business Day
- Weight:
- 4.87 LBS
- FRICTION PLATE MATERIAL:
- KEVLAR
- PRODUCT NAME:
- DRIVE PLATE (STEEL PLATE)
- RIDING STYLE:
- STREET
- DRIVE PLATE MATERIAL:
- STEEL
- FRICTION PLATE MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- CLUTCH
- UNITS:
- 9 PIECE KIT
MSRP: $199.95Now: $179.96Was: $199.95 -
On Sale
Belt Drives Ltd Clutch Plates 1984-1989 Harley-Davidson Softail Standard FXST BTX-9
BELT DRIVES LTD.
MSRP: $209.95Now: $188.96Was: $209.95Upgrade your ride with our premium clutch plates designed specifically for '84-'89 Big Twin models. These plates are engineered to provide a larger clutch area, ensuring improved performance and durability. Easy to install with a pre-set stack height,...11311803- SKU:
- 11311803
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- DRIVE PLATE MATERIAL:
- STEEL
- FRICTION PLATE MATERIAL:
- KEVLAR
- PRODUCT NAME:
- CLUTCH KIT
- FRICTION PLATE MATERIAL:
- STEEL
- RIDING STYLE:
- STREET
- UNITS:
- SET OF 7
MSRP: $209.95Now: $188.96Was: $209.95 -
On Sale
Belt Drives Ltd Clutch Plates 1998-2017 Harley-Davidson Softail BTX-14
BELT DRIVES LTD.
MSRP: $257.95Now: $232.16Was: $257.95Upgrade your ride with our premium clutch plates designed specifically for Big Twin models from 1998 to 2017. These plates are engineered to provide exceptional grip and durability, enhancing your bike's performance while ensuring a seamless installation...11311805- SKU:
- 11311805
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- FRICTION PLATE MATERIAL:
- 6061 T-6 ALUMINUM
- RIDING STYLE:
- STREET
- DRIVE PLATE MATERIAL:
- STEEL
- PRODUCT NAME:
- CLUTCH KIT
- FRICTION PLATE MATERIAL:
- KEVLAR
- UNITS:
- SET OF 8
MSRP: $257.95Now: $232.16Was: $257.95 -
On Sale
Belt Drives Ltd 1.5" 70 Tooth Mesh Pulley for Harley-Davidson Softail Springer 1995-1997 RPMS-70
BELT DRIVES LTD.
MSRP: $494.95Now: $445.46Was: $494.95Experience superior performance with the BELT DRIVES LTD. 1.50" Pulley Mesh 70 Tooth RPMS-70. Crafted from high-quality CNC billet aluminum, this pulley ensures durability and precision for your drive systems. Designed to meet RMA standards, it...DS325842- SKU:
- DS325842
- Availability:
- Ships Same Business Day
- Weight:
- 6.25 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- PULLEY
- TOOTH COUNT:
- 70
- MATERIAL:
- BILLET ALUMINUM
- COLOR/FINISH:
- CHROME
- MODEL:
- MESH
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $494.95Now: $445.46Was: $494.95 -
On Sale
Belt Drives Ltd 132 Tooth 1-3/4" Primary Belt for 1972-1984 Harley-Davidson FX Models BDL-132
BELT DRIVES LTD.
MSRP: $106.95Now: $96.26Was: $106.95Upgrade your BDL primary drive system with the BDL-132 Replacement Belt, engineered for optimal performance and durability. This high-quality belt ensures smooth operation and enhances the efficiency of your drive, making it an essential component for...DS360001- SKU:
- DS360001
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PRODUCT NAME:
- DRIVE BELT
- STYLE:
- RIBBED
- TOOTH COUNT:
- 132
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 1-3/4'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $106.95Now: $96.26Was: $106.95 -
On Sale
Belt Drives Ltd 141 Tooth 1-3/4" Primary Drive Belt for 1990-2006 Harley-Davidson Softail BDL-141
BELT DRIVES LTD.
MSRP: $106.95Now: $96.26Was: $106.95Enhance the performance of your BDL primary drives with the BDL-141 Replacement Belt. Engineered for durability and precision, this belt ensures smooth operation and optimal power transfer, making it an essential component for maintaining your...DS360002- SKU:
- DS360002
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- PRODUCT NAME:
- DRIVE BELT
- STYLE:
- RIBBED
- TOOTH COUNT:
- 141
- TYPE:
- PRIMARY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 1-3/4'
MSRP: $106.95Now: $96.26Was: $106.95
