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 Primary Chain Drive System with Clutch for 1979-1983 Harley-Davidson FXE Super Glide CD-1-70
BELT DRIVES LTD.
MSRP: $1,576.46Now: $1,088.06Was: $1,576.46The primary drive system is the mechanical backbone of your FXE's engine, and worn or inadequate components directly compromise throttle response, power delivery, and clutch modulation. The Belt Drives Ltd CD-1-70 eliminates slippage and grabbing issues...DS191014- SKU:
- DS191014
- Availability:
- Ships Same Business Day
- Weight:
- 22.45 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PRIMARY CHAIN DRIVE KIT
- UNITS:
- KIT
MSRP: $1,576.46Now: $1,088.06Was: $1,576.46 -
On Sale
Belt Drives Ltd Primary Chain Drive System with Clutch for 1990-1998 Harley-Davidson Softail and Dyna Models CD-1-90
BELT DRIVES LTD.
MSRP: $1,577.54Now: $1,088.06Was: $1,577.54A worn or inefficient primary drive system compromises power transfer from your engine to the transmission, resulting in sluggish engagement and unpredictable clutch feel. The Belt Drives Ltd CD-1-90 restores crisp throttle response and eliminates clutch...DS191018- SKU:
- DS191018
- Availability:
- Ships Same Business Day
- Weight:
- 24.13 LBS
- PRODUCT NAME:
- PRIMARY CHAIN DRIVE KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
MSRP: $1,577.54Now: $1,088.06Was: $1,577.54Qty in Cart: 0Quantity:Price:MSRP: $1,577.54Now: $1,088.06Was: $1,577.54Subtotal: -
On Sale
Belt Drives Ltd Clutch Fiber Plates for 1990-1997 BDL Competitor Clutch CDCP-100
BELT DRIVES LTD.
MSRP: $166.92Now: $115.16Was: $166.92Your clutch system demands reliable power transfer without slip—especially under hard acceleration or sustained performance driving. Belt Drives Ltd clutch fiber plates deliver the friction consistency and thermal stability needed to maintain engagement...DS191019- SKU:
- DS191019
- Availability:
- Ships Same Business Day
- Weight:
- 1.44 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- FRICTION PLATE SET
- TYPE:
- CLUTCH
- UNITS:
- SET OF 7
- FRICTION PLATE MATERIAL:
- KEVLAR
MSRP: $166.92Now: $115.16Was: $166.92 -
On Sale
Belt Drives Ltd Steel Clutch Plates for Harley-Davidson Softail 1990-2006 CDDP-100
BELT DRIVES LTD.
MSRP: $114.92Now: $79.16Was: $114.92Stock clutch plates struggle to handle sustained high-performance demands, resulting in slippage, premature wear, and unpredictable engagement. Belt Drives Ltd Steel Clutch Plates deliver approximately 60% more surface contact area than OEM units,...DS191020- SKU:
- DS191020
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- PRODUCT NAME:
- DRIVE PLATE SET (STEEL PLATE SET)
- RIDING STYLE:
- STREET
- DRIVE PLATE MATERIAL:
- STEEL
- TYPE:
- CLUTCH
- UNITS:
- SET OF 8
MSRP: $114.92Now: $79.16Was: $114.92 -
On Sale
Belt Drives Ltd Shoulder Bolts for 1979-1981 Harley Davidson FXEF Fat Bob CDSB-100
BELT DRIVES LTD.
MSRP: $45.08Now: $31.46Was: $45.08If you're running a Belt Drives Ltd clutch system on your FXEF Fat Bob, the fasteners matter just as much as the clutch itself. OEM shoulder bolts wear, corrode, and can compromise your clutch engagement—leading to slippage and inconsistent power...DS191021- SKU:
- DS191021
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- UNITS:
- 9 PACK
- DIAMETER:
- 9,5 MM (3/8')
- TYPE:
- CLUTCH
- LENGTH:
- 31,1 MM (1-1/4')
- LENGTH IMPERIAL:
- 1-1/4'
- PRODUCT NAME:
- SHOULDER BOLT
- RIDING STYLE:
- STREET
MSRP: $45.08Now: $31.46Was: $45.08 -
On Sale
Belt Drives Ltd Polished Domed Pulley Cover Kit for 1986-1989 Harley Davidson FLST Heritage Softail MD-100
BELT DRIVES LTD.
MSRP: $116.00Now: $85.46Was: $116.00If you're running a 1986-1989 FLST Heritage Softail, belt drive aesthetics matter as much as reliability. The Belt Drives Ltd. Polished Domed Pulley Cover Kit transforms your motor and clutch covers into show-quality components while protecting critical...DS191026- SKU:
- DS191026
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TOOTH COUNT:
- 47
- TYPE:
- PULLEY
- PRODUCT NAME:
- COVER
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 72
- UNITS:
- KIT
MSRP: $116.00Now: $85.46Was: $116.00 -
On Sale
Belt Drives Ltd 1.5" 65 Tooth Pulley for 1999 Harley-Davidson FLHTCI Electra Glide Classic RPP-65
BELT DRIVES LTD.
MSRP: $574.00Now: $395.96Was: $574.00If you're running a 1999 Harley-Davidson FLHTCI Electra Glide Classic, pulley selection directly impacts your belt drive's efficiency and longevity. This Belt Drives Ltd pulley delivers precision-machined construction and proven RMA compatibility,...DS325817- SKU:
- DS325817
- Availability:
- Ships Same Business Day
- Weight:
- 6.38 LBS
- MATERIAL:
- BILLET ALUMINUM
- MODEL:
- SOLID
- TOOTH COUNT:
- 65
- WIDTH IMPERIAL:
- 1-1/2'
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- PULLEY
MSRP: $574.00Now: $395.96Was: $574.00 -
On Sale
Belt Drives Ltd 1.5in 70 Tooth Rear Pulley for 1986-1999 Harley Davidson FLHTC Electra Glide Classic RPP-70
BELT DRIVES LTD.
MSRP: $574.00Now: $395.96Was: $574.00A properly sized rear pulley is critical to achieving the right final drive ratio and ensuring your belt system operates smoothly under load. This Belt Drives Ltd 70-tooth pulley delivers the precision engineering and durability you need for reliable,...DS325818- SKU:
- DS325818
- Availability:
- Ships Same Business Day
- Weight:
- 8.06 LBS
- MATERIAL:
- BILLET ALUMINUM
- TOOTH COUNT:
- 70
- MODEL:
- SOLID
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 1-1/2'
- PRODUCT NAME:
- PULLEY
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
MSRP: $574.00Now: $395.96Was: $574.00 -
On Sale
Belt Drives Ltd 1.5" 65 Tooth Mesh Pulley for 1994-1999 Harley Davidson FLHR Road King RPMS-65
BELT DRIVES LTD.
MSRP: $645.08Now: $445.46Was: $645.08Running a worn or undersized pulley on your 1994-1999 Road King compromises belt tension stability and accelerates drivetrain wear. This CNC-machined 65-tooth pulley delivers precise belt engagement and reliable power transmission, keeping your primary...DS325824- SKU:
- DS325824
- Availability:
- Ships Same Business Day
- Weight:
- 4.85 LBS
- MODEL:
- MESH
- TOOTH COUNT:
- 65
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- PULLEY
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $645.08Now: $445.46Was: $645.08 -
On Sale
Belt Drives Ltd Replacement Primary Drive Belt 1980-1982 Harley-Davidson Sturgis FXB PCC-78-118
BELT DRIVES LTD.
MSRP: $325.54Now: $240.26Was: $325.54Primary drive belts wear with every ride, and a compromised belt risks slippage, power loss, and potential catastrophic failure. The Belt Drives Ltd PCC-78-118 is engineered specifically for 1980-1982 Harley-Davidson Sturgis FXB models, delivering the...DS360018- SKU:
- DS360018
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- STYLE:
- RIBBED
- TOOTH COUNT:
- 78
- UNITS:
- EACH
- PRODUCT NAME:
- DRIVE BELT
- TYPE:
- PRIMARY
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 1-1/8'
MSRP: $325.54Now: $240.26Was: $325.54 -
On Sale
Belt Drives Ltd Steel Drive Plate Round Dogs 2009 Harley-Davidson Dyna Fat Bob FXDF ERDS-100
BELT DRIVES LTD.
MSRP: $19.08Now: $13.46Was: $19.08If you're running a BDL Belt Drive clutch system on your 2009 Dyna Fat Bob, worn or damaged steel drive plate dogs will quickly degrade clutch engagement and responsiveness. The ERDS-100 replacement dogs restore precision fit and reliable power transfer,...DS360035- SKU:
- DS360035
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- MATERIAL:
- STEEL
- UNITS:
- EACH
- PRODUCT NAME:
- STEEL PLATE
- RIDING STYLE:
- STREET
- TYPE:
- DRIVE PLATE
MSRP: $19.08Now: $13.46Was: $19.08 -
On Sale
Belt Drives Ltd 28 Tooth Transmission Pulley for Harley Sportster 1991-2003 TPS-28
BELT DRIVES LTD.
MSRP: $265.23Now: $182.66Was: $265.23Reducing unsprung weight is one of the most effective upgrades for Harley Sportster performance, and the Belt Drives Ltd TPS-28 Transmission Pulley delivers exactly that. By cutting pulley mass by roughly one-third compared to stock, you'll notice...DS360046- SKU:
- DS360046
- Availability:
- Ships Same Business Day
- Weight:
- 2.19 LBS
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- TOOTH COUNT:
- 28
- PRODUCT NAME:
- PULLEY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $265.23Now: $182.66Was: $265.23 -
On Sale
Belt Drives Ltd 29 Tooth Transmission Pulley for 1991-2003 Harley-Davidson Sportster XLH883 TPS-29
BELT DRIVES LTD.
MSRP: $265.23Now: $182.66Was: $265.23Reducing rotating mass on your primary drive improves throttle response and reduces parasitic power loss—this 29-tooth transmission pulley sheds a third of the weight of stock options while maintaining the strength needed for reliable performance. If...DS360047- SKU:
- DS360047
- Availability:
- Ships Same Business Day
- Weight:
- 2.38 LBS
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- PULLEY
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 29
- UNITS:
- EACH
MSRP: $265.23Now: $182.66Was: $265.23Qty in Cart: 0Quantity:Price:MSRP: $265.23Now: $182.66Was: $265.23Subtotal: -
On Sale
Belt Drives Ltd 30 Tooth Transmission Pulley for 1991-2003 Harley Sportster TPS-30
BELT DRIVES LTD.
MSRP: $265.23Now: $182.66Was: $265.23Reducing unsprung weight on your Harley's drivetrain directly improves acceleration, handling, and fuel efficiency—and this Belt Drives Ltd transmission pulley delivers measurable gains without sacrificing durability. The 6061 T-6 aluminum construction...DS360048- SKU:
- DS360048
- Availability:
- Ships Same Business Day
- Weight:
- 2.63 LBS
- TOOTH COUNT:
- 30
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- PULLEY
MSRP: $265.23Now: $182.66Was: $265.23 -
On Sale
Belt Drives Ltd 138 Tooth 8mm Primary Drive Belt for Harley Davidson Softail 1986-2003 BDL-138K
BELT DRIVES LTD.
MSRP: $184.62Now: $135.86Was: $184.62If you're running a BDL primary drive on your Harley Davidson Softail, belt degradation is a silent threat to reliability and performance. The BDL-138K replaces worn or damaged belts with OEM-equivalent construction, restoring consistent power transfer...DS360086- SKU:
- DS360086
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PRODUCT NAME:
- DRIVE BELT
- WIDTH IMPERIAL:
- 1-5/8'
- STYLE:
- RIBBED
- TYPE:
- PRIMARY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TOOTH COUNT:
- 138
MSRP: $184.62Now: $135.86Was: $184.62 -
On Sale
Belt Drives Ltd 8mm Primary Belt Drive Electric Start 79-84 Harley-Davidson 61-41SE-2
BELT DRIVES LTD.
MSRP: $890.00Now: $657.86Was: $890.00If you're running a 1979-1984 electric start Harley-Davidson, a primary belt drive upgrade is one of the most effective ways to improve reliability, reduce maintenance, and deliver smoother power delivery. Belt drives eliminate the mess and wear of chain...DS360098- SKU:
- DS360098
- Availability:
- Ships Same Business Day
- Weight:
- 9.40 LBS
- COLOR/FINISH:
- ANODIZED
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BELT DRIVE KIT
- TOOTH COUNT:
- 132
- THICKNESS IMPERIAL:
- 5/16'
- UNITS:
- KIT
MSRP: $890.00Now: $657.86Was: $890.00 -
On Sale
Belt Drives Ltd 8mm Primary Belt Drive Electric Start 1965-1978 61-41SE-1
BELT DRIVES LTD.
MSRP: $890.00Now: $657.86Was: $890.00A reliable primary belt drive is foundational to smooth power delivery and clutch longevity on classic Harley-Davidson models. This Belt Drives Ltd system eliminates slack and wear associated with chain primaries, reducing maintenance while improving...DS360099- SKU:
- DS360099
- Availability:
- Ships Same Business Day
- Weight:
- 10.06 LBS
- WIDTH IMPERIAL:
- 1-1/2'
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- COLOR/FINISH:
- ANODIZED
- THICKNESS IMPERIAL:
- 5/16'
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- TOOTH COUNT:
- 132
MSRP: $890.00Now: $657.86Was: $890.00 -
On Sale
Belt Drives Ltd 8mm 1.5in Primary Belt Drive Kit for 1979-1984 Harley-Davidson FXR 61-41SK-4
BELT DRIVES LTD.
MSRP: $764.62Now: $565.16Was: $764.62A worn or inefficient primary drive directly impacts power delivery and clutch responsiveness on your FXR. This complete Belt Drives Ltd kit eliminates slippage and drivetrain lag with precision-engineered components that maintain tight tolerances...DS360101- SKU:
- DS360101
- Availability:
- Ships Same Business Day
- Weight:
- 8.81 LBS
- UNITS:
- KIT
- THICKNESS IMPERIAL:
- 5/16'
- WIDTH IMPERIAL:
- 1-1/2'
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 132
MSRP: $764.62Now: $565.16Was: $764.62 -
On Sale
Belt Drives Ltd 8mm 1.5in Primary Belt Drive Kit for 1965-1978 Harley-Davidson FLH 62-40SK-3
BELT DRIVES LTD.
MSRP: $764.62Now: $565.16Was: $764.62If you're running a classic FLH and tired of chain maintenance headaches, this belt drive kit delivers the reliability and smooth operation your vintage Harley deserves. A primary belt system reduces noise, eliminates the need for constant adjustments,...DS360102- SKU:
- DS360102
- Availability:
- Ships Same Business Day
- Weight:
- 8.69 LBS
- COLOR/FINISH:
- ANODIZED
- TOOTH COUNT:
- 132
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 5/16'
- UNITS:
- KIT
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $764.62Now: $565.16Was: $764.62 -
On Sale
Belt Drives Ltd 8mm 1.5in Primary Belt Drive Kit for 1955-1957 Harley-Davidson Hydra Glide FL 62-39SK-2
BELT DRIVES LTD.
MSRP: $764.62Now: $565.16Was: $764.62If you're running a kick-start Harley-Davidson Hydra Glide from the mid-1950s, a reliable primary drive system is non-negotiable for consistent performance and longevity. This Belt Drives Ltd 8mm kit eliminates the wear and maintenance headaches of worn...DS360103- SKU:
- DS360103
- Availability:
- Ships Same Business Day
- Weight:
- 8.25 LBS
- COLOR/FINISH:
- ANODIZED
- TOOTH COUNT:
- 132
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 5/16'
- WIDTH IMPERIAL:
- 1-1/2'
- UNITS:
- KIT
MSRP: $764.62Now: $565.16Was: $764.62
