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
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DIAMOND Primary Chain - #428-2-82 - 4-Speed DMD-4282RV82NCA
DIAMOND
$208.95A primary chain is the backbone of your 4-speed transmission's power delivery—it needs to handle aggressive acceleration and consistent load without stretching or breaking. Diamond's endless link design eliminates weak master link connections, giving you...DS192090- SKU:
- DS192090
- Availability:
- Ships Same Business Day
- Weight:
- 3.56 LBS
- PRODUCT NAME:
- PRIMARY CHAIN
- RIDING STYLE:
- STREET
- NUMBER OF LINKS:
- 82
- UNITS:
- EACH
$208.95 -
DIAMOND Primary Chain - #35-3-94 DMD-C35-3R94NRI
DIAMOND
$174.95A primary chain is the backbone of your engine's power delivery system—it directly impacts reliability, efficiency, and overall drivetrain longevity. The DIAMOND Primary Chain #35-3-94 delivers the precision engineering and durability demanded by serious...DS192092- SKU:
- DS192092
- Availability:
- Ships Same Business Day
- Weight:
- 2.38 LBS
- RIDING STYLE:
- STREET
- NUMBER OF LINKS:
- 94
- PRODUCT NAME:
- PRIMARY CHAIN
- UNITS:
- EACH
$174.95 -
DIAMOND Primary Chain - 428-2 x 86 DMD-4282RV86NCA
DIAMOND
$218.95A reliable primary chain is foundational to consistent power delivery and engine longevity. The DIAMOND 428-2 x 86 Primary Chain delivers the strength and precision needed for high-rpm applications, whether you're running a street bike, mini bike, or...11200410- SKU:
- 11200410
- Availability:
- Ships Same Business Day
- Weight:
- 3.75 LBS
- PRODUCT NAME:
- PRIMARY CHAIN
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MODEL:
- DIAMOND
$218.95 -
DIAMOND Primary Chain - #428-2-76 - 5-Speed DMD-4282RV76NCA
DIAMOND
$192.95A reliable primary chain is the backbone of any high-performance drivetrain—if it fails, so does your machine. The DIAMOND Primary Chain #428-2-76 delivers the durability and precision that professional racers and serious enthusiasts demand, engineered...DS192094- SKU:
- DS192094
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- NUMBER OF LINKS:
- 76
- PRODUCT NAME:
- PRIMARY CHAIN
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$192.95 -
DRAG SPECIALTIES Primary Chain Adjuster 71517
DRAG SPECIALTIES
$25.70A worn or misaligned primary chain creates excessive slack, leading to erratic engagement, noise, and potential drivetrain damage. The DRAG Specialties Primary Chain Adjuster 71517 restores precise tension and alignment, ensuring smooth power delivery...DS192004- SKU:
- DS192004
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- COLOR/FINISH:
- ZINC
- MATERIAL:
- STEEL
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CHAIN ADJUSTER KIT
- TYPE:
- PRIMARY CHAIN
- UNITS:
- EACH
$25.70 -
DRAG SPECIALTIES Primary Chain - 428-2 x 76 C226T3/006
DRAG SPECIALTIES
$137.97A primary chain is fundamental to your bike's power delivery—it's the direct mechanical link between your engine and transmission. The DRAG Specialties 428-2 x 76 C226T3/006 is engineered for reliability and longevity, featuring pre-loaded construction...11200282- SKU:
- 11200282
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- NUMBER OF LINKS:
- 76
- UNITS:
- EACH
- PRODUCT NAME:
- PRIMARY CHAIN
- RIDING STYLE:
- STREET
$137.97 -
DRAG SPECIALTIES Primary Chain - #35-3 x 96 CA35-3S2N/1001
DRAG SPECIALTIES
$131.79Drag Specialties' #35-3 x 96 primary chain is engineered for the demands of high-RPM racing and heavy-duty street applications. Pre-loaded construction minimizes initial stretch, keeping your timing precise and reducing the need for early adjustment...11200287- SKU:
- 11200287
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- PRODUCT NAME:
- PRIMARY CHAIN
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- NUMBER OF LINKS:
- 96
$131.79 -
DRAG SPECIALTIES Mainshaft Bearing Kit 25-3102
DRAG SPECIALTIES
$31.11A worn or failing mainshaft bearing compromises clutch engagement, increases drivetrain slop, and accelerates wear on adjacent components. This sealed bearing kit restores the precise tolerances your transmission demands, whether you're running stock...11200217- SKU:
- 11200217
- Availability:
- Ships Same Business Day
- Weight:
- 0.52 LBS
- TYPE:
- INNER PRIMARY MAINSHAFT
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
$31.11 -
DRAG SPECIALTIES Inner Primary Bearing R16-2RS-W
DRAG SPECIALTIES
$11.81A worn or failing inner primary bearing creates excessive play in your transmission mainshaft, leading to poor power delivery, increased noise, and potential catastrophic drivetrain failure during hard acceleration. The DRAG Specialties R16-2RS-W sealed...11200177- SKU:
- 11200177
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- TYPE:
- INNER PRIMARY MAINSHAFT
- UNITS:
- EACH
$11.81 -
On Sale
Belt Drives Ltd Front Pulley 1-5/8" 45 Tooth for 79-84 FX Shovel 84-86 Softail 45EV DS360415
BELT DRIVES LTD.
MSRP: $289.95Now: $260.96Was: $289.95Engineered for precision and durability, this front pulley is crafted from high-quality aluminum and features a hard anodized finish for enhanced wear resistance. Proudly made in the U.S.A., it is designed to deliver optimal performance and reliability...DS360415- SKU:
- DS360415
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- COLOR/FINISH:
- ANODIZED
- TOOTH COUNT:
- 45
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PULLEY
- RIDING STYLE:
- STREET
- TYPE:
- MOTOR SHAFT
MSRP: $289.95Now: $260.96Was: $289.95 -
On Sale
Belt Drives Ltd 3" Front Pulley for 1986-1989 Harley-Davidson Softail Models 47-OFP
BELT DRIVES LTD.
MSRP: $197.95Now: $178.16Was: $197.95Engineered for precision and durability, the BELT DRIVES LTD. 3" Front Pulley is crafted from high-quality aluminum and finished with a hard anodized coating. Proudly made in the U.S.A., this pulley ensures optimal performance and longevity in demanding...DS360417- SKU:
- DS360417
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- PRODUCT NAME:
- PULLEY
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 47
- TYPE:
- MOTOR SHAFT
MSRP: $197.95Now: $178.16Was: $197.95 -
On Sale
Belt Drives Ltd 3" Offset Pulley 48 Tooth for 1982-1994 Harley FXR 48-OFP
BELT DRIVES LTD.
MSRP: $197.95Now: $178.16Was: $197.95Proper belt alignment is critical for maximizing drivetrain efficiency and extending component lifespan on your FXR. This 48-tooth offset pulley delivers precision fitment for 3" belt systems while maintaining the exact spacing your motor demands. Belt...DS360422- SKU:
- DS360422
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- TOOTH COUNT:
- 48
- UNITS:
- EACH
- PRODUCT NAME:
- PULLEY
- RIDING STYLE:
- STREET
- TYPE:
- MOTOR SHAFT
MSRP: $197.95Now: $178.16Was: $197.95 -
On Sale
Belt Drives Ltd 130 Tooth 8mm x 41mm Primary Drive Belt BDL-130K
BELT DRIVES LTD.
MSRP: $155.95Now: $140.36Was: $155.95A worn or damaged primary drive belt compromises the entire efficiency of your BDL system, leading to slippage, power loss, and potential drivetrain damage. The BDL-130K Replacement Belt restores precision fit and load capacity, ensuring consistent power...DS360430- SKU:
- DS360430
- Availability:
- Ships Same Business Day
- Weight:
- 0.52 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 130
- UNITS:
- EACH
- STYLE:
- RIBBED
- PRODUCT NAME:
- DRIVE BELT
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 1-5/8'
MSRP: $155.95Now: $140.36Was: $155.95 -
On Sale
Belt Drives Ltd 8mm Primary Drive Belt 138 Teeth for 1970-1983 Harley-Davidson Touring BDL-138-38K
BELT DRIVES LTD.
MSRP: $150.95Now: $135.86Was: $150.95If you're running a BDL primary drive on your classic Harley-Davidson Touring, belt wear is inevitable—and when it happens, you need a direct replacement that matches the original's precision engineering. The Belt Drives Ltd 8mm Primary Drive Belt...23021252- SKU:
- 23021252
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- DRIVE BELT
- WIDTH IMPERIAL:
- 1-1/2'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- STYLE:
- RIBBED
- TOOTH COUNT:
- 138
- TYPE:
- PRIMARY
MSRP: $150.95Now: $135.86Was: $150.95 -
On Sale
Belt Drives Ltd 3" 8mm Belt Drive with Clutch for 1965-1984 Harley-Davidson Shovelhead FLH Electra Glide EV-76-47S
BELT DRIVES LTD.
MSRP: $1,175.95Now: $1,058.36Was: $1,175.95If you're running a classic Shovelhead and tired of chain maintenance, noise, and power loss, a modern belt drive system is the single most practical upgrade you can make. Belt Drives Ltd's 3" 8mm system delivers reliable power transfer with virtually...23021263- SKU:
- 23021263
- Availability:
- Ships Same Business Day
- Weight:
- 18.50 LBS
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- MATERIAL:
- STEEL
- WIDTH IMPERIAL:
- 3'
- COLOR/FINISH:
- BLACK
- UNITS:
- KIT
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
MSRP: $1,175.95Now: $1,058.36Was: $1,175.95 -
On Sale
Belt Drives Ltd 11mm Belt Drive Kit for Harley-Davidson FLH Electra Glide 1979-1983 47-31SE-RB
BELT DRIVES LTD.
MSRP: $693.95Now: $624.56Was: $693.95If you're running a 1979-1983 FLH Electra Glide, a belt drive upgrade replaces the factory chain with a cleaner, quieter, and more reliable power transfer system that requires less maintenance and delivers consistent performance mile after mile. This...23025001- SKU:
- 23025001
- Availability:
- Ships Same Business Day
- Weight:
- 11.40 LBS
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- BELT DRIVE KIT
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $693.95Now: $624.56Was: $693.95Qty in Cart: 0Quantity:Price:MSRP: $693.95Now: $624.56Was: $693.95Subtotal: -
On Sale
Belt Drives Ltd Rear Pulley Cover for Softail 1990-2006 TFRPC-2000
BELT DRIVES LTD.
MSRP: $137.95Now: $124.16Was: $137.95If you're running a BDL belt drive clutch on your Softail, protecting that investment matters. The TFRPC-2000 rear pulley cover shields your drivetrain from road debris and wear while maintaining the clean lines of your build. This is the functional...11200044- SKU:
- 11200044
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- PRODUCT NAME:
- REAR PULLEY COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $137.95Now: $124.16Was: $137.95 -
On Sale
Belt Drives Ltd 140 Tooth 2 Inch Wide Primary Drive Belt for Harley-Davidson Touring 2009-2016 BDL-140-2
BELT DRIVES LTD.
MSRP: $173.95Now: $156.56Was: $173.95Primary drive belts are critical wear items that directly impact power delivery and ride quality on your Harley-Davidson touring rig. The BDL-140-2 replacement belt maintains the precise tension and engagement that your primary drive system demands,...11200095- SKU:
- 11200095
- Availability:
- Ships Same Business Day
- Weight:
- 0.67 LBS
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 2'
- STYLE:
- RIBBED
- UNITS:
- EACH
- PRODUCT NAME:
- DRIVE BELT
- TOOTH COUNT:
- 140
- TYPE:
- PRIMARY
MSRP: $173.95Now: $156.56Was: $173.95 -
On Sale
Belt Drives Ltd. Monster Top Fuel Belt Drive Kit for Harley-Davidson Softail 1990-2006 TF-2000
BELT DRIVES LTD.
MSRP: $3,839.95Now: $3,455.96Was: $3,839.95If you're running a high-performance Softail and want to eliminate the complexity of chain maintenance while gaining reliable power delivery, the Belt Drives Ltd. Monster Top Fuel Belt Drive Kit delivers the efficiency and durability that separates...11200173- SKU:
- 11200173
- Availability:
- Ships Same Business Day
- Weight:
- 51.60 LBS
- MATERIAL:
- STEEL
- UNITS:
- KIT
- MODEL:
- MONSTER
- PRODUCT NAME:
- BELT DRIVE KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $3,839.95Now: $3,455.96Was: $3,839.95 -
On Sale
Belt Drives Ltd 2" Belt Drive Kit for Harley Softail 1990-2006 Black EV-700B
BELT DRIVES LTD.
MSRP: $3,884.95Now: $3,496.46Was: $3,884.95If you're running a Softail and tired of stock belt-drive compromises, the Belt Drives Ltd EV-700B delivers the durability and customization you need without sacrificing reliability. The all-billet construction handles increased load and vibration while...11200320- SKU:
- 11200320
- Availability:
- Ships Same Business Day
- Weight:
- 18.10 LBS
- TOOTH COUNT:
- 142
- MATERIAL:
- BILLET ALUMINUM
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BELT DRIVE KIT
- WIDTH IMPERIAL:
- 2'
MSRP: $3,884.95Now: $3,496.46Was: $3,884.95
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.
