Harley Primary Drive Systems and Parts
Harley-Davidson Primary Drive Systems & Parts at JJ Motorsports
Upgrade your Harley's primary drive with premium belt drive systems and components from JJ Motorsports, featuring high-strength pulleys, replacement belts, and complete kits for smoother power transfer, reduced maintenance, and classic open-primary style on Evo, Twin Cam, and Big Twin models. These durable parts deliver reliable performance and timeless looks.
Shop Belt Drives Ltd primary systems for race-proven quality. Explore related categories such as Harley drivetrain for clutches and chains, or Harley for exhaust and suspension to complete your open-primary build.
Top Harley-Davidson Primary Drive Systems & Parts
- Belt Drives Ltd Transmission Pulley TP-30 – 30-tooth rear transmission pulley; precision-machined for belt drive conversions on Evo and Twin Cam.
- Belt Drives Ltd Replacement Belt BDL-132 – High-strength 132-tooth replacement belt; 8mm pitch for long life on open primary systems.
- Belt Drives Ltd Belt Drive Evo 16BH-2C – Complete 2-inch belt drive kit for Evo engines; includes clutch, pulleys, and guard for classic open-primary style.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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On Sale
Belt Drives Ltd Mini-Dome Pulley Cover Kit for Harley-Davidson FLST Heritage Softail 1986-1989 MD-200
BELT DRIVES LTD.
MSRP: $88.95Now: $80.06Was: $88.95Enhance the performance and appearance of your pulley system with the Mini-Dome Pulley Covers MD-200. This comprehensive kit includes everything you need for a seamless installation, ensuring your motor operates efficiently and looks great. Proudly made...DS360420- SKU:
- DS360420
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- UNITS:
- KIT
- TOOTH COUNT:
- 47
- TOOTH COUNT:
- 76
- TYPE:
- PULLEY
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
MSRP: $88.95Now: $80.06Was: $88.95 -
On Sale
Belt Drives Ltd Starter Housing for 1990-2006 Harley Davidson Softail TFSH-100
BELT DRIVES LTD.
MSRP: $121.95Now: $109.76Was: $121.95Enhance your BDL Belt Drive clutches with the premium Starter Housing designed specifically for the Top Fuel TFSH-100. This robust housing ensures optimal performance and reliability, making it an essential component for serious racers and enthusiasts...11200047- SKU:
- 11200047
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- HOUSING
MSRP: $121.95Now: $109.76Was: $121.95 -
On Sale
Belt Drives Ltd 9T Starter Pinion Gear for 1996-2006 Harley Davidson FLHR Road King PG-100A
BELT DRIVES LTD.
MSRP: $156.95Now: $141.26Was: $156.95Enhance your BDL Belt Drive clutches with the precision-engineered Pinion Gear +1" PG-100A. Designed for optimal performance and durability, this gear ensures smooth operation and efficient power transfer. Upgrade your system for improved reliability and...11200057- SKU:
- 11200057
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- LENGTH METRIC:
- 115.8 MM
- PRODUCT NAME:
- PINION GEAR
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 9
- UNITS:
- KIT
- LENGTH IMPERIAL:
- 4-9/16'
- LENGTH:
- 115,8 MM (4-9/16')
MSRP: $156.95Now: $141.26Was: $156.95 -
On Sale
Belt Drives Ltd 2" SS Belt Drive Without Cover 1990-2006 Harley-Davidson Softail SS-2
BELT DRIVES LTD.
MSRP: $2,411.95Now: $2,170.76Was: $2,411.95Experience unmatched performance and sleek design with our 2" Stainless Steel Belt Drive. Engineered with a robust one-piece billet motor plate, this belt drive ensures reliability and efficiency, making it the perfect addition to your ride. ...11200082- SKU:
- 11200082
- Availability:
- Ships Same Business Day
- Weight:
- 36.20 LBS
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BELT DRIVE KIT
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 2'
MSRP: $2,411.95Now: $2,170.76Was: $2,411.95 -
On Sale
Belt Drives Ltd Primary Chain Drive Kit with Ball-Bearing Lockup Clutch for 1990-2006 Harley-Davidson Softail and Dyna Models CDBCS-1-90
BELT DRIVES LTD.
MSRP: $1,344.95Now: $1,210.46Was: $1,344.95Upgrade your ride with the BDL Primary Drive Kit, designed for optimal performance and ease of use. Featuring a state-of-the-art ball-bearing lockup clutch, this kit enhances power transfer while significantly reducing clutch effort. Enjoy a smoother and...11200179- SKU:
- 11200179
- Availability:
- Ships Same Business Day
- Weight:
- 23.35 LBS
- RIDING STYLE:
- STREET
- FEATURES:
- INCLUDES COMPENSATOR
- UNITS:
- KIT
- TOOTH COUNT:
- 25
- PRODUCT NAME:
- PRIMARY CHAIN DRIVE KIT
MSRP: $1,344.95Now: $1,210.46Was: $1,344.95 -
On Sale
Belt Drives Ltd 3" Belt Drive Kit for 1990-2006 Harley-Davidson Softail Models EVOB-9S
BELT DRIVES LTD.
MSRP: $2,684.95Now: $2,416.46Was: $2,684.95Experience superior performance with the Belt Drives Ltd. 3" Belt Drive EVOB-9S, designed for seamless integration and optimal efficiency. This comprehensive kit includes everything you need for a straightforward installation, ensuring a reliable and...11200251- SKU:
- 11200251
- Availability:
- Ships Same Business Day
- Weight:
- 38.10 LBS
- MATERIAL:
- KEVLAR
- PRODUCT NAME:
- BELT DRIVE KIT
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- MATERIAL:
- STEEL
- WIDTH IMPERIAL:
- 3'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $2,684.95Now: $2,416.46Was: $2,684.95 -
On Sale
Belt Drives Ltd 2" Open Belt Drive Kit for 1990-2006 Harley-Davidson Softail EV-575
BELT DRIVES LTD.
MSRP: $2,556.95Now: $2,301.26Was: $2,556.95Experience superior power transfer with the Enhanced Performance Drive Belt EV-575, designed for optimal efficiency and reliability. Featuring a ball-bearing lockup clutch, this kit offers increased surface contact for smoother operation, ensuring your...11200226- SKU:
- 11200226
- Availability:
- Ships Same Business Day
- Weight:
- 34.30 LBS
- COLOR/FINISH:
- CHROME
- TOOTH COUNT:
- 142
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 2'
- COLOR/FINISH:
- POLISHED
- MATERIAL:
- KEVLAR
- STYLE:
- RIBBED
- UNITS:
- KIT
MSRP: $2,556.95Now: $2,301.26Was: $2,556.95 -
On Sale
Belt Drives Ltd Belt Drive Kit for 1955-1964 Harley-Davidson Models 61-39SK-2
BELT DRIVES LTD.
MSRP: $627.95Now: $565.16Was: $627.95Upgrade your motorcycle's performance with the Belt Drives Ltd. Belt Drive Kit designed for models from 1955 to early 1984. This kit features a robust 61-tooth basket and a precision-engineered 39-tooth front pulley, ensuring smooth power transfer and...11200423- SKU:
- 11200423
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
MSRP: $627.95Now: $565.16Was: $627.95Qty in Cart: 0Quantity:Price:MSRP: $627.95Now: $565.16Was: $627.95Subtotal: -
On Sale
Belt Drives Ltd 2" Open Belt Drive Kit for 2007-2017 Harley-Davidson Softail and Dyna Models EVO-8S-2
BELT DRIVES LTD.
MSRP: $3,033.95Now: $2,730.56Was: $3,033.95Experience enhanced performance with the Belt Drives Ltd. 2" Drive Belt EVO-8S-2, designed for optimal power transfer and durability. This advanced clutch system features a ball-bearing lockup mechanism that significantly increases surface contact,...11200229- SKU:
- 11200229
- Availability:
- Ships Same Business Day
- Weight:
- 34.85 LBS
- STYLE:
- RIBBED
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 2'
- COLOR/FINISH:
- POLISHED
- MATERIAL:
- KEVLAR
- PRODUCT NAME:
- BELT DRIVE KIT
- TOOTH COUNT:
- 142
MSRP: $3,033.95Now: $2,730.56Was: $3,033.95Qty in Cart: 0Quantity:Price:MSRP: $3,033.95Now: $2,730.56Was: $3,033.95Subtotal: -
On Sale
Belt Drives Ltd 14mm 1-1/2in Primary Belt 69T Harley-Davidson 1985-1996 FLH FLT FXR PCC-69-112
BELT DRIVES LTD.
MSRP: $236.95Now: $213.26Was: $236.95The PCC-69-112 Replacement Belt from Belt Drives Ltd. is engineered for optimal performance in BDL primary drives. Designed for durability and efficiency, this belt ensures smooth operation and longevity, making it an essential component for your drive...DS360016- SKU:
- DS360016
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- STYLE:
- RIBBED
- TYPE:
- PRIMARY
- PRODUCT NAME:
- DRIVE BELT
- TOOTH COUNT:
- 69
- WIDTH IMPERIAL:
- 1-1/2'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $236.95Now: $213.26Was: $236.95Qty in Cart: 0Quantity:Price:MSRP: $236.95Now: $213.26Was: $236.95Subtotal: -
On Sale
Belt Drives Ltd 8mm 3" Primary Belt Drive Kick Start Spline Shaft 1955-1984 76-47-3S
BELT DRIVES LTD.
MSRP: $691.95Now: $622.76Was: $691.95Upgrade your motorcycle's performance with our high-quality 8mm Primary Belt Drive Kick Start Spline Shaft. Designed for durability and efficiency, this kit includes essential components to enhance your ride. Crafted in the U.S.A., it is perfect for...DS360113- SKU:
- DS360113
- Availability:
- Ships Same Business Day
- Weight:
- 11.90 LBS
- WIDTH IMPERIAL:
- 3'
- TOOTH COUNT:
- 144
- UNITS:
- KIT
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
MSRP: $691.95Now: $622.76Was: $691.95 -
On Sale
Belt Drives Ltd Transmission Pulley 32T for Harley-Davidson Softail Custom FXSTC 1986-1999 TP-32
BELT DRIVES LTD.
MSRP: $202.95Now: $182.66Was: $202.95Experience enhanced performance with the BELT DRIVES LTD. Transmission Pulley TP-32, expertly crafted from lightweight 6061 T-6 aluminum and finished with a durable hard anodized coating. Designed to significantly reduce weight while maintaining...DS360167- SKU:
- DS360167
- Availability:
- Ships Same Business Day
- Weight:
- 3.06 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- TOOTH COUNT:
- 32
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- PULLEY
MSRP: $202.95Now: $182.66Was: $202.95Qty in Cart: 0Quantity:Price:MSRP: $202.95Now: $182.66Was: $202.95Subtotal: -
EASTERN MOTORCYCLE PARTS Bearing - 9231 41-0111
EASTERN MOTORCYCLE PARTS
$49.95High-quality replacement component, Fits OEM and most aftermarket inner primaries11200309- SKU:
- 11200309
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- TYPE:
- INNER PRIMARY MAINSHAFT
$49.95 -
On Sale
Belt Drives Ltd 3" Belt Drive with Support for Harley-Davidson Softail 1990-2006 EVOB-900
BELT DRIVES LTD.
MSRP: $3,297.95Now: $2,968.16Was: $3,297.95This 3" belt drive kit is engineered for superior performance and durability, featuring an outboard bearing support that enhances stability for your rear shaft. Designed in the spirit of BDL's renowned "Top Fuel" belt kits, it includes a robust aramid...11200255- SKU:
- 11200255
- Availability:
- Ships Same Business Day
- Weight:
- 44.20 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- POLISHED
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 3'
- MATERIAL:
- 6061-ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- MATERIAL:
- KEVLAR
MSRP: $3,297.95Now: $2,968.16Was: $3,297.95 -
DRAG SPECIALTIES Compensating Sprocket Shaft Extension - +1-3/8" 346238
DRAG SPECIALTIES
$76.17Hardened alloy steel extension has been precision ground, For use with OEM or most aftermarket compensating sprockets, Used when offsetting transmission in wide tire applications11200002- SKU:
- 11200002
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- PRODUCT NAME:
- SHAFT EXTENSION
- RIDING STYLE:
- STREET
- SIZE IMPERIAL:
- +1-3/8'
- UNITS:
- EACH
- MATERIAL:
- STEEL
- TYPE:
- COMPENSATING SPROCKET
$76.17Qty in Cart: 0Quantity:Price:$76.17Subtotal: -
DRAG SPECIALTIES Primary Drive Kit 210185
DRAG SPECIALTIES
$836.31Kits include compensating sprocket assembly, chain adjuster assembly and complete clutch assembly with aramid friction plates, Primary chains sold separately11200077- SKU:
- 11200077
- Availability:
- Ships Same Business Day
- Weight:
- 22.00 LBS
- TOOTH COUNT:
- 36
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PRIMARY CHAIN DRIVE KIT
$836.31 -
DRAG SPECIALTIES Primary Chain Adjusting Shoe 15-0906-SC1
DRAG SPECIALTIES
$16.43Replaces stock nylon shoeDS192003- SKU:
- DS192003
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- PRIMARY CHAIN
- UNITS:
- EACH
- PRODUCT NAME:
- ADJUSTING SHOE
- RIDING STYLE:
- STREET
- MATERIAL:
- NYLON
$16.43Qty in Cart: 0Quantity:Price:$16.43Subtotal: -
DRAG SPECIALTIES Replacement Chain Adjuster Shoe G15-0940K-NU
DRAG SPECIALTIES
$23.64Manual primary chain adjuster, Stops over-tightening of the primary chain that can occur with the stock automatic adjuster, Reduces the stress on the motor sprocket bearings and transmission drive bearings, Allows correct adjustment of the primary chain...11200394- SKU:
- 11200394
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- EACH
- TYPE:
- PRIMARY
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- PRIMARY CHAIN ADJUSTER KIT
- RIDING STYLE:
- STREET
$23.64Qty in Cart: 0Quantity:Price:$23.64Subtotal: -
DRAG SPECIALTIES Compensating Sprocket - 24 Tooth 26-0020-24BXLB1
DRAG SPECIALTIES
$110.16Replacement steel compensating sprocketsDS191011- SKU:
- DS191011
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- PRODUCT NAME:
- SPROCKET
- TYPE:
- COMPENSATING
- MATERIAL:
- STEEL
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 24
$110.16Qty in Cart: 0Quantity:Price:$110.16Subtotal: -
DRAG SPECIALTIES Primary Chain Adjuster Nut - XL '04-'17 G15-0941K-NU
DRAG SPECIALTIES
$10.25Zinc-plated11200353- SKU:
- 11200353
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- ZINC
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- ADJUSTER NUT
- UNITS:
- EACH
- TYPE:
- SEALING
$10.25Qty in Cart: 0Quantity:Price:$10.25Subtotal:
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Primary Drive Systems and Parts
- Compatibility: Ensure parts fit your Harley's model (e.g., Evo, Twin Cam, Big Twin, Softail 1986-2006, FL/FLH 1946-1984, FX 1972-1984, Sportster/Buell 1991-2003). Use the vehicle selector for year-specific matches, including belt widths (1-1/2" to 3") and pitches (8mm to 14mm) to avoid power transfer issues.
- Type of Use: For classic open-primary style or kick-start setups, choose complete belt drive kits; street performance benefits from lightweight pulleys and tensioners for smoother operation and reduced weight in daily riding.
- Components and Upgrades: Select belts (132-144 tooth, ribbed), pulleys (30-70 tooth, front/rear), kits (with clutches, guards), tensioners (manual billet), spacers (starter), or adjuster shoes. Focus on hard anodized aluminum for durability and high-strength designs for reliable performance.
- Brand and Quality: Opt for Belt Drives Ltd (BDL) for premium kits and pulleys, Powerstands Racing for chain tensioners, Terry Components for starter spacers, or Baker Drivetrain for adjuster shoes. Prioritize USA-made billet aluminum and anodized finishes for corrosion resistance and longevity.
- Installation and Cost: Most parts are bolt-on with OEM hardware for easy DIY setup; kits may require additional components. Prices range from $49 for adjuster shoes to $651.95 for complete kits—factor in free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What Harley models do these primary drive systems support? Systems fit models like Softail (1986-2006), FL/FLH (1946-1984), FX (1972-1984), Sportster/Buell (1991-2003), and more—use the year/make/model filter for exact compatibility.
- How do belt drive kits improve performance? They provide smoother power transfer, reduced maintenance, and classic open-primary looks with high-strength pulleys and belts for durability.
- What is typically included in a belt drive kit? Kits like BDL's include clutches, pulleys, guards, and belts (e.g., 132-144 tooth, 8mm-14mm pitch)—check details for kick-start or specific widths.
- Are tensioners necessary for primary chains? Yes, manual tensioners like Powerstands Racing prevent over-tightening, with billet aluminum construction for easy adjustments.
- What if a part doesn't fit my Harley? Verify model, year, and specifications (e.g., tooth count, width) before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related drivetrain parts? Yes—explore clutches, belts, sprockets, or full drivetrain kits in the Harley drivetrain category to complement your primary drive upgrade.
