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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TERRY COMPONENTS Starter Spacer 779000
TERRY COMPONENTS
$142.95When upgrading to a high-output aftermarket starter, the factory fuel filler neck often sits too close to the enlarged motor, creating clearance issues that compromise installation and aesthetics. The TERRY COMPONENTS Starter Spacer 779000 solves this...DS196233- SKU:
- DS196233
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- COLOR/FINISH:
- POLISHED
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- SPACER BLOCK
$142.95 -
POWERSTANDS RACING Primary Chain Tensioner 12-02001-22
POWERSTANDS RACING
$222.95Proper primary chain tension is critical to engine longevity and performance—too tight and you're accelerating wear on bearings and sprockets, too loose and you risk chain slap and timing issues. The POWERSTANDS Racing Primary Chain Tensioner gives you...11200409- SKU:
- 11200409
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- CHAIN TENSIONER
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$222.95 -
POWERSTANDS RACING Primary Chain Tensioner 12-02000-22
POWERSTANDS RACING
$222.95A properly tensioned primary chain is critical to reliable engine performance, yet manual adjustment leaves room for human error and over-tightening that can damage bearings and reduce engine life. The POWERSTANDS RACING Primary Chain Tensioner...11200408- SKU:
- 11200408
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- CHAIN TENSIONER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$222.95 -
POWERSTANDS RACING Primary Chain Tensioner 12-02002-22
POWERSTANDS RACING
$222.95A properly tensioned primary chain is essential for reliable power delivery and engine longevity. The POWERSTANDS RACING Primary Chain Tensioner maintains consistent chain tension throughout throttle transitions and engine load cycles, preventing...11200424- SKU:
- 11200424
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- CHAIN TENSIONER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$222.95 -
On Sale
Belt Drives Ltd 96 Tooth 11mm x 1-1/2in Primary Drive Belt BDL-30884
BELT DRIVES LTD.
MSRP: $163.95Now: $147.56Was: $163.95The 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 efficiency of your drive system, providing smooth operation...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: $163.95Now: $147.56Was: $163.95 -
On Sale
Belt Drives Ltd 30 Tooth Transmission Pulley for 1991-2003 Harley-Davidson Sportster and Buell Models TPS-30
BELT DRIVES LTD.
MSRP: $202.95Now: $182.66Was: $202.95Reducing 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 these benefits through precision 6061 T-6 aluminum...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: $202.95Now: $182.66Was: $202.95 -
On Sale
Belt Drives Ltd 8mm 144 Tooth Primary Belt for 1955-1984 Harley-Davidson FL Models BDL-37144-1
BELT DRIVES LTD.
MSRP: $93.95Now: $84.56Was: $93.95If 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 durability your drive system demands, eliminating slippage...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: $93.95Now: $84.56Was: $93.95 -
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: $118.95Now: $107.06Was: $118.95If 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 reliable torque transfer and eliminates the guesswork of...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: $118.95Now: $107.06Was: $118.95 -
On Sale
Belt Drives Ltd 78 Tooth 14mm Primary Drive Belt for Harley-Davidson FL 1946-1952 BDL-38078
BELT DRIVES LTD.
MSRP: $236.95Now: $213.26Was: $236.95Primary 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 replacement belt restores the precision power transfer...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: $236.95Now: $213.26Was: $236.95 -
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: $585.95If 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 eliminates chain stretch, reduces vibration, and delivers...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: $651.95If 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 kit eliminates the weak points of chain-driven...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: $272.95Your 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 your 1984-1989 model requires, engineered with...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 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 -
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: $96.26Was: $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 essential component for optimal performance. ...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: $96.26Was: $106.95Qty in Cart: 0Quantity:Price:MSRP: $106.95Now: $96.26Was: $106.95Subtotal: -
On Sale
Belt Drives Ltd 1990-2002 Harley-Davidson Softail 3" Primary Drive Belt BDL-141-3
BELT DRIVES LTD.
MSRP: $185.95Now: $167.36Was: $185.95The 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 and longevity in demanding conditions. Upgrade your drive...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: $185.95Now: $167.36Was: $185.95 -
On Sale
Belt Drives Ltd 3in Rubber Belt for 2000-2002 Harley-Davidson FLTR Road Glide BDL-132-3
BELT DRIVES LTD.
MSRP: $167.95Now: $151.16Was: $167.95Enhance 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. Upgrade your system with this high-quality replacement...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: $167.95Now: $151.16Was: $167.95 -
On Sale
Belt Drives Ltd 11mm 1-1/2in Primary Belt 92T Harley-Davidson 1941-1984 BDL-5S11
BELT DRIVES LTD.
MSRP: $163.95Now: $147.56Was: $163.95The BDL-5S11 Replacement Belt from Belt Drives Ltd. is engineered for optimal performance in BDL primary drives. This durable and reliable belt ensures smooth operation, enhancing the efficiency of your machinery while providing long-lasting service. ...DS360010- SKU:
- DS360010
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 92
- UNITS:
- EACH
- STYLE:
- RIBBED
- PRODUCT NAME:
- DRIVE BELT
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $163.95Now: $147.56Was: $163.95 -
BAKER DRIVETRAIN Primary Adjuster Shoe DD6-178
BAKER DRIVETRAIN
$49.00Made in the U.S.A.11200220- SKU:
- 11200220
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY CHAIN
- MODEL:
- FAT SHOE
- PRODUCT NAME:
- ADJUSTING SHOE
- UNITS:
- EACH
$49.00
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.
