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!
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- Qty in Cart
- Quantity
- Price
- Subtotal
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FEULING OIL PUMP CORP. Compensator Spring - Replacement - Twin Cam 2035
FEULING OIL PUMP CORP.
$59.95Excessive crankshaft harmonics and sluggish low-RPM response are telltale signs of worn compensator springs in your Twin Cam engine. The Feuling Oil Pump Corp. Compensator Spring replaces the factory outer spring with a thicker, stronger design that...11200463- SKU:
- 11200463
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$59.95 -
BAKER DRIVETRAIN Primary Rebuild Kit - '07-'17 Softail, '06-'17 Dyna PRK-FXST-2
BAKER DRIVETRAIN
$119.00When you pull your primary case, you need a complete seal solution—not a guessing game about which gaskets and O-rings will hold pressure and keep oil where it belongs. The BAKER DRIVETRAIN Primary Rebuild Kit eliminates the hassle of sourcing individual...11200439- SKU:
- 11200439
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
$119.00 -
BAKER DRIVETRAIN Primary Rebuild Kit - '94-'06 Softail, '94-'05 Dyna PRK-FXST
BAKER DRIVETRAIN
$119.00When you're inside your primary case, you need seals and gaskets that won't let you down—and you don't want to waste time sourcing individual components from multiple suppliers. The BAKER DRIVETRAIN Primary Rebuild Kit gives you everything you need in...11200440- SKU:
- 11200440
- Availability:
- Ships Same Business Day
- Weight:
- 1.48 LBS
$119.00 -
BAKER DRIVETRAIN Primary Rebuild Kit - '07-'16 Touring PRK-FL-2
BAKER DRIVETRAIN
$119.00When you crack open your primary case for inspection or maintenance, you need a complete gasket and seal kit that won't force you to source parts from multiple suppliers. The BAKER DRIVETRAIN Primary Rebuild Kit keeps you from reusing compromised seals...11200438- SKU:
- 11200438
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
$119.00 -
BAKER DRIVETRAIN Primary Rebuild Kit - '94-'06 Touring PRK-FL
BAKER DRIVETRAIN
$119.00When you crack open your primary case for service, inspection, or rebuild work, you need a complete gasket and seal solution—not a scattered collection of individual parts. The BAKER DRIVETRAIN Primary Rebuild Kit eliminates guesswork by delivering every...11200441- SKU:
- 11200441
- Availability:
- Ships Same Business Day
- Weight:
- 1.48 LBS
$119.00 -
BAKER DRIVETRAIN Primary Rebuild Kit - M8 Softail PRK-ST-M8
BAKER DRIVETRAIN
$149.00When you crack open your M8 Softail primary case, you need gaskets and seals that won't leave you chasing oil leaks for the next thousand miles. This comprehensive Baker rebuild kit eliminates guesswork by bundling every gasket, seal, and O-ring required...11200442- SKU:
- 11200442
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
$149.00 -
BAKER DRIVETRAIN Primary Rebuild Kit - M8 Touring PRK-FL-M8
BAKER DRIVETRAIN
$149.00When you pull your M8 Touring primary case, using OEM gaskets and seals is a gamble—dried-out or compromised seals lead to leaks, contamination, and costly damage. The BAKER DRIVETRAIN Primary Rebuild Kit gives you a complete, factory-quality replacement...11200443- SKU:
- 11200443
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
$149.00 -
DRAG SPECIALTIES Primary Tensioner Kit - '91-'03 XL G15-0945
DRAG SPECIALTIES
$52.95A worn or outdated primary tensioner system compromises both reliability and performance on your Harley-Davidson XL. This auto-adjust kit eliminates manual tension adjustments and the guesswork that comes with them, giving you consistent,...11200446- SKU:
- 11200446
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$52.95 -
DRAG SPECIALTIES Primary Tensioner Kit - '01-'06 Twin Cam/'01-'05 Dyna G15-0946
DRAG SPECIALTIES
$81.57A properly functioning primary tensioner is essential for maintaining consistent chain tension and preventing premature wear on your Twin Cam or Dyna drivetrain. This DRAG Specialties auto-adjust kit eliminates the guesswork of manual adjustment and...11200447- SKU:
- 11200447
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
$81.57 -
DRAG SPECIALTIES Primary Tensioner Kit - Big Twin G15-0947
DRAG SPECIALTIES
$117.61A worn or outdated primary tensioner system compromises chain security and engine reliability—two non-negotiables in high-performance riding. The DRAG Specialties Primary Tensioner Kit upgrades your Big Twin to an auto-adjust design, eliminating manual...11200448- SKU:
- 11200448
- Availability:
- Ships Same Business Day
- Weight:
- 1.74 LBS
$117.61 -
BAKER DRIVETRAIN Armored Attitude Chain Adjuster - Replacement Shoe 176-67A
BAKER DRIVETRAIN
$46.95Chain slap and wear aren't just noise—they're performance killers that compromise drivetrain reliability and power delivery. This BAKER DRIVETRAIN replacement shoe keeps your chain adjuster operating at peak efficiency, ensuring consistent tension and...11200452- SKU:
- 11200452
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$46.95Qty in Cart: 0Quantity:Price:$46.95Subtotal: -
On Sale
S&S CYCLE Heavy Duty Compensator Ramp - Gray - M8 560-0360
S&S CYCLE
MSRP: $349.95Now: $314.96Was: $349.95A worn or compromised compensator ramp directly impacts engine reliability and clutch performance on your M8—especially under load or aggressive riding conditions. This S&S Cycle heavy-duty replacement restores proper compensation geometry while...11200459- SKU:
- 11200459
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
MSRP: $349.95Now: $314.96Was: $349.95 -
DARKHORSE MOTOR COMPANY Man O-War Motor Sprocket - M8 DH-MMS-A34
DARKHORSE MOTOR COMPANY
$579.95If you're running a Milwaukee 8 and tired of the noise and harshness that comes with solid compensators, the Man O-War Motor Sprocket delivers the torque response you need without sacrificing rider comfort. This performance-engineered primary drive...11200460- SKU:
- 11200460
- Availability:
- Ships Same Business Day
- Weight:
- 8.33 LBS
$579.95 -
DARKHORSE MOTOR COMPANY Replacement Cushion Kit - Man O-War DH-MCR-K
DARKHORSE MOTOR COMPANY
$49.95Keep your Man O-War motorsprocket performing at peak efficiency with this complete replacement cushion kit. Over time, cushion wear degrades sprocket response and introduces harmful vibration into your drivetrain. This OEM-equivalent kit supplies all...11200461- SKU:
- 11200461
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$49.95 -
DARKHORSE MOTOR COMPANY Replacement Cushion Kit - Man O-War - With Compression Tool DH-MCCR-K
DARKHORSE MOTOR COMPANY
$114.95Motorsprocket cushions wear out—it's inevitable. Rather than replacing your entire Man O-War assembly, this kit lets you rebuild the cushioning system with fresh components, restoring dampening performance and extending drivetrain life. OEM-quality...11200462- SKU:
- 11200462
- Availability:
- Ships Same Business Day
- Weight:
- 0.84 LBS
$114.95 -
DRAG SPECIALTIES Compensator Spring Pack - '09-'22 241276
DRAG SPECIALTIES
$81.05A worn or failing compensator spring directly impacts clutch engagement consistency and overall drivetrain reliability—especially critical if you're running your bike hard or putting serious miles on it. This OEM-quality replacement restores factory-spec...11200444- SKU:
- 11200444
- Availability:
- Ships Same Business Day
- Weight:
- 3.68 LBS
- TYPE:
- SPRING
- UNITS:
- PACK
- PRODUCT NAME:
- COMPENSATOR
- RIDING STYLE:
- STREET
$81.05 -
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
$222.95Qty in Cart: 0Quantity:Price:$222.95Subtotal: -
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
$222.95Qty in Cart: 0Quantity:Price:$222.95Subtotal:
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.
