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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GARDNER-WESTCOTT Primary Cover Hardware P-10-18-08
GARDNER-WESTCOTT
$79.95If you're running a classic or custom engine build, OEM fasteners won't cut it—you need hardware that matches the quality of your work. The Gardner-Westcott Primary Cover Hardware Kit delivers...DS175007- SKU:
- DS175007
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- BOLT KIT
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal: -
On Sale
Belt Drives Ltd 2" Belt Drive Kit for 1990-2006 Harley-Davidson Softail EV-600-B
BELT DRIVES LTD.
MSRP: $3,191.95Now: $2,872.76Was: $3,191.95If you're running a belt drive on your Softail, you know that smooth power transfer and reliable engagement are non-negotiable. The Belt Drives Ltd EV-600-B replaces worn or damaged drive systems...11200257- SKU:
- 11200257
- Availability:
- Ships Same Business Day
- Weight:
- 37.55 LBS
- STYLE:
- RIBBED
- MATERIAL:
- KEVLAR
- TOOTH COUNT:
- 142
- COLOR/FINISH:
- BLACK
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 2'
MSRP: $3,191.95Now: $2,872.76Was: $3,191.95Qty in Cart: 0Quantity:Price:MSRP: $3,191.95Now: $2,872.76Was: $3,191.95Subtotal: -
On Sale
Jims Primary Bearing Upgrade 1990-2006 Harley-Davidson Softail Springer 8960
JIMS
MSRP: $51.00Now: $45.90Was: $51.00The primary bearing is your engine's foundation for efficient power transfer—when it wears, you're losing performance and risking catastrophic failure. The JIMS Primary Bearing Kit 8960 uses a...11200242- SKU:
- 11200242
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- BEARING KIT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
MSRP: $51.00Now: $45.90Was: $51.00 -
On Sale
EASTERN MOTORCYCLE PARTS Bearing - 8980 A-8980
EASTERN MOTORCYCLE PARTS
MSRP: $26.95Now: $24.52Was: $26.95Worn or failing primary bearings compromise both engine reliability and power delivery, making this OEM-equivalent bearing essential for any serious motorcycle builder or racer. The Eastern...11200344- SKU:
- 11200344
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY MAINSHAFT
- UNITS:
- EACH
MSRP: $26.95Now: $24.52Was: $26.95 -
On Sale
EASTERN MOTORCYCLE PARTS Bronze Bushing - 33445-89 A-33445-89
EASTERN MOTORCYCLE PARTS
MSRP: $14.95Now: $13.60Was: $14.95Bronze bushings are critical wear components that reduce friction and noise in pivot points, linkages, and suspension systems. A quality bushing like this Eastern Motorcycle Parts unit ensures smooth...21100453- SKU:
- 21100453
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- BRONZE
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY COVER
- UNITS:
- EACH
MSRP: $14.95Now: $13.60Was: $14.95 -
On Sale
EASTERN MOTORCYCLE PARTS Bronze Bushing - 33446-94 A-33446-94
EASTERN MOTORCYCLE PARTS
MSRP: $20.95Now: $19.06Was: $20.95Worn or damaged bushings compromise your motorcycle's handling precision and accelerate wear on connected components. This EASTERN MOTORCYCLE PARTS bronze bushing restores proper clearance and...21100454- SKU:
- 21100454
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- BRONZE
- TYPE:
- INNER PRIMARY COVER
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $20.95Now: $19.06Was: $20.95 -
DRAG SPECIALTIES Primary Tensioner Kit 15-0937K
DRAG SPECIALTIES
$102.77A worn or outdated primary tensioner system compromises both reliability and performance, introducing slack that affects power transfer and increases wear on your primary chain. The DRAG Specialties...11200160- SKU:
- 11200160
- Availability:
- Ships Same Business Day
- Weight:
- 1.08 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY CHAIN
- UNITS:
- KIT
- PRODUCT NAME:
- CHAIN ADJUSTER KIT
$102.77 -
DRAG SPECIALTIES Inner Primary Bushing 292241
DRAG SPECIALTIES
$20.09The inner primary bushing is a high-wear component that directly affects clutch engagement smoothness and primary drive reliability. Over time, worn bushings create excessive play in your primary...21100035- SKU:
- 21100035
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- MATERIAL:
- STEEL
- UNITS:
- EACH
$20.09 -
DRAG SPECIALTIES Inner Primary Bushing 292240
DRAG SPECIALTIES
$20.09Inner primary bushings are critical wear components that take constant punishment from gear meshing and rotational forces in your primary drivetrain. A worn or damaged bushing introduces play into...21100036- SKU:
- 21100036
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- BUSHING
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
$20.09 -
DRAG SPECIALTIES Outer Primary Bushing - '94-'06 292243
DRAG SPECIALTIES
$14.79Primary housing bushings wear down with every clutch engagement, leading to excessive play, noise, and potential drivetrain damage. This OEM-quality replacement from Drag Specialties restores proper...21100037- SKU:
- 21100037
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BUSHING
- UNITS:
- EACH
- MATERIAL:
- STEEL
- TYPE:
- STARTER SHAFT
$14.79 -
DRAG SPECIALTIES Outer Primary Bushing - '89-'93 292242
DRAG SPECIALTIES
$14.79Primary case bushings are critical wear items that directly impact clutch engagement precision and powertrain longevity. Over time, steel bushings wear, causing excess play in your primary drive and...21100038- SKU:
- 21100038
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- STARTER SHAFT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- BUSHING
- UNITS:
- EACH
$14.79 -
DRAG SPECIALTIES One-Piece Sprocket Kit 191205
DRAG SPECIALTIES
$198.17If you're running a solid-steel sprocket setup, you know that traditional diaphragm spring compensators create noise and complexity you don't need. The DRAG SPECIALTIES One-Piece Sprocket Kit...11200413- SKU:
- 11200413
- Availability:
- Ships Same Business Day
- Weight:
- 4.15 LBS
- PRODUCT NAME:
- SPROCKET KIT
- TYPE:
- PRIMARY
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
$198.17 -
DRAG SPECIALTIES Sprocket Kit 241336
DRAG SPECIALTIES
$361.38A properly sized sprocket kit is critical for maximizing your engine's power delivery and maintaining optimal chain tension across the entire RPM range. The DRAG SPECIALTIES Sprocket Kit 241336...11200435- SKU:
- 11200435
- Availability:
- Ships Same Business Day
- Weight:
- 10.71 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- SPROCKET KIT
- RIDING STYLE:
- STREET
$361.38Qty in Cart: 0Quantity:Price:$361.38Subtotal: -
DRAG SPECIALTIES Compensating Sprocket Shaft Extension - +1" 346232
DRAG SPECIALTIES
$78.39Running a wide tire setup? This compensating sprocket shaft extension solves the offset transmission clearance issue without requiring custom fabrication. A precision-engineered solution that...11200001- SKU:
- 11200001
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- MATERIAL:
- STEEL
- SIZE IMPERIAL:
- +1'
- TYPE:
- COMPENSATING SPROCKET
- PRODUCT NAME:
- SHAFT EXTENSION
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$78.39 -
DRAG SPECIALTIES Primary Drive Kit 210186
DRAG SPECIALTIES
$953.95A reliable primary drive system is the foundation of consistent power delivery and smooth engagement in any high-performance application. The DRAG Specialties Primary Drive Kit 210186 delivers the...11200076- SKU:
- 11200076
- Availability:
- Ships Same Business Day
- Weight:
- 22.75 LBS
- TOOTH COUNT:
- 25
- PRODUCT NAME:
- PRIMARY CHAIN DRIVE KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$953.95 -
DRAG SPECIALTIES Primary Drive Kit 210184
DRAG SPECIALTIES
$833.00A properly functioning primary drive system is the foundation of reliable clutch engagement and smooth power transfer to your wheel. The DRAG SPECIALTIES Primary Drive Kit 210184 delivers OEM-quality...11200078- SKU:
- 11200078
- Availability:
- Ships Same Business Day
- Weight:
- 21.75 LBS
- PRODUCT NAME:
- PRIMARY CHAIN DRIVE KIT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 37
- UNITS:
- KIT
$833.00Qty in Cart: 0Quantity:Price:$833.00Subtotal: -
DRAG SPECIALTIES Compensator Sprocket 241271
DRAG SPECIALTIES
$152.31The DRAG SPECIALTIES Compensator Sprocket is engineered to maintain precise primary drive engagement and reduce shock loads in your drivetrain. A quality compensator sprocket minimizes chain slack...11200304- SKU:
- 11200304
- Availability:
- Ships Same Business Day
- Weight:
- 5.40 LBS
- TYPE:
- COMPENSATING
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 34
- UNITS:
- EACH
$152.31 -
DRAG SPECIALTIES Primary Chain - 428-2 x 92 C226T3/009
DRAG SPECIALTIES
$189.69A primary chain is the foundation of reliable power delivery in any high-performance drivetrain. This DRAG SPECIALTIES 428-2 x 92 C226T3/009 chain delivers the fatigue resistance and consistency that...11200285- SKU:
- 11200285
- Availability:
- Ships Same Business Day
- Weight:
- 3.90 LBS
- UNITS:
- EACH
- NUMBER OF LINKS:
- 92
- PRODUCT NAME:
- PRIMARY CHAIN
- RIDING STYLE:
- STREET
$189.69 -
DRAG SPECIALTIES Primary Sprocket 191200
DRAG SPECIALTIES
$163.08If you're running a solid steel primary sprocket setup, you need a compensator that matches the durability of your drivetrain—not one that's fighting spring noise and wear every time you roll on the...11200390- SKU:
- 11200390
- Availability:
- Ships Same Business Day
- Weight:
- 4.75 LBS
- PRODUCT NAME:
- SPROCKET KIT
- TYPE:
- COMPENSATING
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- TOOTH COUNT:
- 34
$163.08Qty in Cart: 0Quantity:Price:$163.08Subtotal: -
DRAG SPECIALTIES Inner Primary Bearing 20-2037
DRAG SPECIALTIES
$35.25A worn or damaged inner primary bearing will compromise your entire drivetrain's efficiency and create costly secondary failures down the line. This OEM-spec bearing restores smooth power transfer...11200306- SKU:
- 11200306
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- INNER PRIMARY
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$35.25
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.
