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
-
On Sale
Belt Drives Ltd 96 Tooth 11mm x 1-1/2in Primary Drive Belt BDL-30884
BELT DRIVES LTD.
MSRP: $172.92Now: $164.27Was: $172.92The BDL-30884 Replacement Belt is designed specifically for BDL primary drives, ensuring optimal performance and durability. This high-quality belt offers a reliable solution for maintaining the...DS360011- SKU:
- DS360011
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- DRIVE BELT
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 1-1/2'
- STYLE:
- RIBBED
- TOOTH COUNT:
- 96
MSRP: $172.92Now: $164.27Was: $172.92 -
On Sale
Belt Drives Ltd 30 Tooth Transmission Pulley TP-30
BELT DRIVES LTD.
MSRP: $265.23Now: $251.97Was: $265.23Reducing unsprung weight at the transmission improves acceleration response and reduces rotational inertia—critical gains for both street and track applications. The Belt Drives Ltd TP-30 delivers...DS360165- SKU:
- DS360165
- Availability:
- Ships Same Business Day
- Weight:
- 2.69 LBS
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- PULLEY
- TOOTH COUNT:
- 30
MSRP: $265.23Now: $251.97Was: $265.23 -
On Sale
Belt Drives Ltd 8mm 144 Tooth Primary Belt for 1955-1984 Harley-Davidson FL Models BDL-37144-1
BELT DRIVES LTD.
MSRP: $105.38Now: $100.11Was: $105.38If you're running a classic Harley-Davidson FL with a BDL primary drive, belt degradation directly impacts power delivery and reliability. This OEM replacement belt restores the precision fit and...DS360012- SKU:
- DS360012
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- STYLE:
- RIBBED
- TOOTH COUNT:
- 144
- PRODUCT NAME:
- DRIVE BELT
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $105.38Now: $100.11Was: $105.38Qty in Cart: 0Quantity:Price:MSRP: $105.38Now: $100.11Was: $105.38Subtotal: -
On Sale
Belt Drives Ltd Replacement Primary Belt 144 Tooth 2 Inch Wide for Harley-Davidson FL 1955-1964 BDL-37144-2
BELT DRIVES LTD.
MSRP: $144.46Now: $137.24Was: $144.46If your Harley FL primary drive is showing signs of belt wear or slippage, you're losing power delivery efficiency and risking catastrophic drive failure. The BDL-37144-2 replacement belt restores...DS360013- SKU:
- DS360013
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 144
- WIDTH IMPERIAL:
- 2'
- UNITS:
- EACH
- PRODUCT NAME:
- DRIVE BELT
- TYPE:
- PRIMARY
- STYLE:
- RIBBED
MSRP: $144.46Now: $137.24Was: $144.46 -
On Sale
Belt Drives Ltd 78 Tooth 14mm Primary Drive Belt for Harley-Davidson FL 1946-1952 BDL-38078
BELT DRIVES LTD.
MSRP: $288.77Now: $274.33Was: $288.77Primary belt wear is inevitable on vintage Harley FL models, and a slipping or degraded belt directly compromises throttle response and overall drivetrain efficiency. The Belt Drives Ltd BDL-38078...DS360015- SKU:
- DS360015
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- STYLE:
- RIBBED
- TOOTH COUNT:
- 78
- TYPE:
- PRIMARY
- PRODUCT NAME:
- DRIVE BELT
- WIDTH IMPERIAL:
- 1-1/2'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $288.77Now: $274.33Was: $288.77 -
On Sale
Belt Drives Ltd 11mm Belt Drive Kit for 1955-1964 Harley-Davidson FLH 47-31SK-2
BELT DRIVES LTD.
MSRP: $764.62Now: $726.39Was: $764.62If you're running a classic FLH and still relying on an outdated chain drive, you're sacrificing reliability and adding unnecessary maintenance to your riding schedule. This 11mm belt drive kit...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: $764.62Now: $726.39Was: $764.62 -
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: $850.92Now: $808.37Was: $850.92If you're running a kick-start Harley from the golden age of American motorcycling, you know that stock primary drives weren't engineered for reliability. Belt Drives Ltd's 8mm 2" primary belt drive...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: $850.92Now: $808.37Was: $850.92 -
On Sale
Belt Drives Ltd 3" Front Pulley 47 Tooth for 1984-1989 Harley-Davidson Softail 47EV-3
BELT DRIVES LTD.
MSRP: $289.33Now: $274.86Was: $289.33Your Softail's belt drive system demands precise pulley geometry to maintain proper tension, power delivery, and longevity. The Belt Drives Ltd 3" Front Pulley delivers the exact 47-tooth profile...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: $289.33Now: $274.86Was: $289.33Qty in Cart: 0Quantity:Price:MSRP: $289.33Now: $274.86Was: $289.33Subtotal: -
On Sale
Belt Drives Ltd 11mm Belt Drive Kit for 1965-1984 Harley-Davidson Shovelhead Electric Start 4-Speed 47-31SE-4
BELT DRIVES LTD.
MSRP: $905.38Now: $860.11Was: $905.38If you're running a carbureted Shovelhead with an electric starter, a belt drive system eliminates the mechanical complexity of traditional chain drives while delivering smoother power delivery and...DS360106- SKU:
- DS360106
- Availability:
- Ships Same Business Day
- Weight:
- 11.25 LBS
- WIDTH IMPERIAL:
- 1-1/2'
- UNITS:
- KIT
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
MSRP: $905.38Now: $860.11Was: $905.38 -
On Sale
Belt Drives Ltd 11mm Belt Drive Kit for 1965-1984 Harley-Davidson Shovelhead Kick Start Spline Shaft 47-31SK-3
BELT DRIVES LTD.
MSRP: $826.15Now: $784.84Was: $826.15If you're running a classic Shovelhead with a kick-start spline shaft, the belt drive system is critical to reliable engine starting and overall drivetrain longevity. Belt Drives Ltd's 11mm kit...DS360107- SKU:
- DS360107
- Availability:
- Ships Same Business Day
- Weight:
- 10.13 LBS
- WIDTH IMPERIAL:
- 1-1/2'
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- COLOR/FINISH:
- ANODIZED
MSRP: $826.15Now: $784.84Was: $826.15 -
On Sale
Belt Drives Ltd 11mm Belt Drive Kit for 1948-1954 Harley-Davidson FL 47-31TK-1
BELT DRIVES LTD.
MSRP: $764.62Now: $726.39Was: $764.62If you're running a classic Harley-Davidson FL from the pre-1955 era, a belt drive conversion eliminates the maintenance headaches of chain lubrication while delivering smoother power delivery to the...DS360109- SKU:
- DS360109
- Availability:
- Ships Same Business Day
- Weight:
- 8.80 LBS
- PRODUCT NAME:
- BELT DRIVE KIT
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ANODIZED
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $764.62Now: $726.39Was: $764.62 -
On Sale
Belt Drives Ltd Compensator Sprocket 25 Tooth Harley-Davidson Softail 1984-1993 CS-25A-1
BELT DRIVES LTD.
MSRP: $178.77Now: $169.83Was: $178.77Stock compensator sprockets rely on springs that wear out, absorb power, and complicate maintenance. The Belt Drives Ltd Compensator Sprocket eliminates this weakness with a three-piece design that...11015001- SKU:
- 11015001
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- RIDING STYLE:
- STREET
- TYPE:
- COMPENSATING
- PRODUCT NAME:
- SPROCKET
- TOOTH COUNT:
- 25
- UNITS:
- EACH
MSRP: $178.77Now: $169.83Was: $178.77 -
On Sale
Belt Drives Ltd 33T Transmission Pulley for 1985-2006 Harley Big Twin TP-33
BELT DRIVES LTD.
MSRP: $265.23Now: $251.97Was: $265.23Reducing parasitic drag on your drivetrain directly translates to measurable gains in acceleration and fuel efficiency. The Belt Drives Ltd TP-33 transmission pulley sheds approximately two-thirds of...DS360168- SKU:
- DS360168
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- PRODUCT NAME:
- PULLEY
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ANODIZED
- UNITS:
- EACH
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- TOOTH COUNT:
- 33
MSRP: $265.23Now: $251.97Was: $265.23 -
On Sale
Belt Drives Ltd Top Fuel Street Drive Replacement Belt for Harley-Davidson FLSTF Fat Boy 1990-2006 BDL-14-85
BELT DRIVES LTD.
MSRP: $410.77Now: $390.23Was: $410.77Primary drive belts are critical wear items on any Harley-Davidson—inadequate power transfer and premature belt failure directly impact reliability and performance. The Belt Drives Ltd Top Fuel...DS360192- SKU:
- DS360192
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 85
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 3-3/8'
- STYLE:
- RIBBED
- PRODUCT NAME:
- DRIVE BELT
- TYPE:
- PRIMARY
MSRP: $410.77Now: $390.23Was: $410.77 -
On Sale
Belt Drives Ltd 1.5" 70 Tooth Mesh Pulley for Harley-Davidson Softail Springer 1995-1997 RPMS-70
BELT DRIVES LTD.
MSRP: $645.08Now: $612.83Was: $645.08Experience 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...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: $645.08Now: $612.83Was: $645.08 -
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: $130.31Now: $123.79Was: $130.31Upgrade 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...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: $130.31Now: $123.79Was: $130.31 -
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: $130.31Now: $123.79Was: $130.31Enhance 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...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: $130.31Now: $123.79Was: $130.31Qty in Cart: 0Quantity:Price:MSRP: $130.31Now: $123.79Was: $130.31Subtotal: -
On Sale
Belt Drives Ltd 141 Tooth 1-5/8" Primary Drive Belt for 1986-1999 Harley-Davidson Softail BDL-141-1-5/8
BELT DRIVES LTD.
MSRP: $106.95Now: $101.60Was: $106.95Upgrade your BDL primary drive with the high-performance Replacement Belt BDL-141-1-5/8. Designed for durability and efficiency, this belt ensures smooth operation and longevity, making it an...DS360004- SKU:
- DS360004
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- DRIVE BELT
- WIDTH IMPERIAL:
- 1-5/8'
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
- UNITS:
- EACH
- STYLE:
- RIBBED
- TOOTH COUNT:
- 141
MSRP: $106.95Now: $101.60Was: $106.95Qty in Cart: 0Quantity:Price:MSRP: $106.95Now: $101.60Was: $106.95Subtotal: -
On Sale
Belt Drives Ltd 1990-2002 Harley-Davidson Softail 3" Primary Drive Belt BDL-141-3
BELT DRIVES LTD.
MSRP: $227.23Now: $215.87Was: $227.23The BDL-141-3 Replacement Belt from Belt Drives Ltd. is engineered for optimal performance in BDL primary drive systems. Designed for durability and reliability, this belt ensures smooth operation...DS360005- SKU:
- DS360005
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 3'
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
- STYLE:
- RIBBED
- TOOTH COUNT:
- 141
- PRODUCT NAME:
- DRIVE BELT
MSRP: $227.23Now: $215.87Was: $227.23 -
On Sale
Belt Drives Ltd 3in Rubber Belt for 2000-2002 Harley-Davidson FLTR Road Glide BDL-132-3
BELT DRIVES LTD.
MSRP: $204.77Now: $194.53Was: $204.77Enhance the performance of your BDL primary drives with the BDL-132-3 Replacement Belt. Engineered for durability and precision, this belt ensures a reliable power transfer for optimal efficiency...DS360006- SKU:
- DS360006
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- DRIVE BELT
- TOOTH COUNT:
- 132
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 3'
- STYLE:
- RIBBED
MSRP: $204.77Now: $194.53Was: $204.77
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.