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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DRAG SPECIALTIES Sprocket Shaft Extension - 5-Speed 26-0018
DRAG SPECIALTIES
$54.54High-quality OEM replacement component11200270- SKU:
- 11200270
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- CHROME
- TYPE:
- SPROCKET
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHAFT EXTENSION
$54.54 -
DRAG SPECIALTIES Inner Primary Bearing Kit 25-3103
DRAG SPECIALTIES
$60.08Includes pinion seal, main shaft seal, bearing snap rings, inner bearing race and bearing, Fits OEM and most aftermarket inner primaries11200281- SKU:
- 11200281
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- TYPE:
- INNER PRIMARY MAINSHAFT
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$60.08 -
DRAG SPECIALTIES Compensating Sprocket Kit 241274
DRAG SPECIALTIES
$305.86Complete kits contain a high-quality sprocket, sprocket shaft extension, sliding cam, sprocket nut and cover with spring plateDS195196- SKU:
- DS195196
- Availability:
- Ships Same Business Day
- Weight:
- 5.68 LBS
- TOOTH COUNT:
- 25
- UNITS:
- KIT
- TYPE:
- COMPENSATING
- PRODUCT NAME:
- SPROCKET KIT
- RIDING STYLE:
- STREET
$305.86 -
DRAG SPECIALTIES Primary Chain - #35-3 x 94 CA35-3S2N/1000
DRAG SPECIALTIES
$129.73Improved fatigue resistance, Pre-loaded to reduce initial elongation, Endless construction using high-quality raw materials for long life, Made in Italy11200286- SKU:
- 11200286
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- NUMBER OF LINKS:
- 94
- PRODUCT NAME:
- PRIMARY CHAIN
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$129.73 -
DRAG SPECIALTIES Inner Primary Mainshaft Bearing with Seal 25-3101
DRAG SPECIALTIES
$60.08Includes pinion seal, main shaft seal, bearing snap rings, inner bearing race and bearing, Fits OEM and most aftermarket inner primaries11200162- SKU:
- 11200162
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PRODUCT NAME:
- SEAL KIT
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY MAINSHAFT
- UNITS:
- KIT
$60.08 -
DRAG SPECIALTIES Primary Chain Adjusting Shoe 15-0905-SC1
DRAG SPECIALTIES
$16.43Replaces stock nylon shoeDS192002- SKU:
- DS192002
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- NYLON
- PRODUCT NAME:
- ADJUSTING SHOE
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY CHAIN
- UNITS:
- EACH
$16.43Qty in Cart: 0Quantity:Price:$16.43Subtotal: -
DRAG SPECIALTIES Inner Primary Bearing Race 40-2337
DRAG SPECIALTIES
$13.42Fits most OEM and most aftermarket inner primaries11200305- SKU:
- 11200305
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING
$13.42 -
DRAG SPECIALTIES Primary Tension Shoe 15-0986
DRAG SPECIALTIES
$17.46Replaces stock nylon shoe11200079- SKU:
- 11200079
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- ADJUSTING SHOE
- TYPE:
- PRIMARY CHAIN
$17.46 -
DRAG SPECIALTIES Primary Chain Adjuster Kit G15-0940K
DRAG SPECIALTIES
$212.13Manual primary chain adjuster, Stops over-tightening of the primary chain that can occur with the stock automatic adjuster, Reduces the stress on the motor sprocket bearings and transmission drive bearings, Allows correct adjustment of the primary chain...11200393- SKU:
- 11200393
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- PRIMARY CHAIN ADJUSTER KIT
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
$212.13 -
DRAG SPECIALTIES Compensator Kit D26-0145K
DRAG SPECIALTIES
$424.31Designed to handle high torque and horsepower in high-performance engine applications, Increased travel helps protect the motor and drivetrain from the harsh shock of full throttle launches, Kit features a 34-tooth compensator sprocket, heavy-duty spring...11200404- SKU:
- 11200404
- Availability:
- Ships Same Business Day
- Weight:
- 11.35 LBS
- TOOTH COUNT:
- 34
- UNITS:
- KIT
- PRODUCT NAME:
- COMPENSATOR
- RIDING STYLE:
- STREET
$424.31 -
DRAG SPECIALTIES Primary Chain Adjuster G15-0941K
DRAG SPECIALTIES
$65.87Includes bracket shoe and retaining clip, Zinc plated, Replaces OEM adjuster11200352- SKU:
- 11200352
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- COLOR/FINISH:
- ZINC
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY CHAIN
- PRODUCT NAME:
- CHAIN ADJUSTER KIT
- UNITS:
- EACH
- MATERIAL:
- STEEL
$65.87 -
S&S CYCLE Inner Primary Bearing Race 560-0241
S&S CYCLE
$82.95Eliminates bearing race movement that can cause costly damage to transmission seal and output bearing, A must for high-performance applications, Made in the U.S.A.11200335- SKU:
- 11200335
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING RACE
$82.95 -
DRAG SPECIALTIES Primary Chain - 428-2 x 82 C226T3/002
DRAG SPECIALTIES
$145.18Improved fatigue resistance, Pre-loaded to reduce initial elongation, Endless construction using high-quality raw materials for long life, Made in Italy11200283- SKU:
- 11200283
- Availability:
- Ships Same Business Day
- Weight:
- 3.50 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- PRIMARY CHAIN
- RIDING STYLE:
- STREET
- NUMBER OF LINKS:
- 82
$145.18 -
DRAG SPECIALTIES Primary Chain Adjusting Shoe 15-0904-SC1
DRAG SPECIALTIES
$10.25Replaces stock nylon shoeDS192001- SKU:
- DS192001
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- PRIMARY CHAIN
- UNITS:
- EACH
- PRODUCT NAME:
- ADJUSTING SHOE
- RIDING STYLE:
- STREET
$10.25Qty in Cart: 0Quantity:Price:$10.25Subtotal: -
DRAG SPECIALTIES Compensating Sprocket Kit 241272-LBX1
DRAG SPECIALTIES
$299.68Complete kits contain a high-quality sprocket, sprocket shaft extension, sliding cam, sprocket nut and cover with spring plateDS195198- SKU:
- DS195198
- Availability:
- Ships Same Business Day
- Weight:
- 6.08 LBS
- TOOTH COUNT:
- 24
- PRODUCT NAME:
- SPROCKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- COMPENSATING
- UNITS:
- KIT
$299.68 -
DRAG SPECIALTIES Primary Shoe Adjuster 210029
DRAG SPECIALTIES
$50.42Includes bracket shoe and retaining clip, Zinc plated, Replaces OEM adjuster78050022- SKU:
- 78050022
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- CHAIN ADJUSTER KIT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ZINC
- TYPE:
- PRIMARY CHAIN
$50.42 -
S&S CYCLE Inner Primary Bearing Race 56-5089
S&S CYCLE
$81.95Eliminates bearing race movement that can cause costly damage to transmission seal and output bearing, A must for high-performance applications, Made in the U.S.A.11200148- SKU:
- 11200148
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- PRODUCT NAME:
- BEARING RACE
- UNITS:
- EACH
$81.95 -
Belt Drives Ltd 8mm Primary Drive Belt for 1971-1984 Harley-Davidson FXR and 1966-1984 Touring BDL-132-1-5/8
BELT DRIVES LTD.
$106.95Enhance the performance of your BDL primary drive with the BDL-132-1-5/8 replacement belt. Designed for durability and efficiency, this belt ensures smooth operation and reliable power transmission. Upgrade your machinery with this high-quality...DS360003- SKU:
- DS360003
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- PRODUCT NAME:
- DRIVE BELT
- WIDTH IMPERIAL:
- 1-5/8'
- STYLE:
- RIBBED
- TYPE:
- PRIMARY
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 132
- UNITS:
- EACH
$106.95Qty in Cart: 0Quantity:Price:$106.95Subtotal: -
Belt Drives Ltd 132 Tooth 1-1/2in Wide Primary Drive Belt for Harley-Davidson FLH 1970-1977 BDL-30853 BE
BELT DRIVES LTD.
$85.95Enhance the performance of your BDL primary drive with the BDL-30853 BE Replacement Belt. Designed for durability and efficiency, this belt ensures optimal power transmission and longevity, making it a reliable choice for your machinery needs. ...DS360008- SKU:
- DS360008
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- STYLE:
- RIBBED
- TOOTH COUNT:
- 132
- UNITS:
- EACH
- PRODUCT NAME:
- DRIVE BELT
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 1-1/2'
- RIDING STYLE:
- STREET
$85.95 -
Belt Drives Ltd Front Pulley 1-1/2" 45EVSH Harley-Davidson FLH 1955-1964 DS360416
BELT DRIVES LTD.
$289.95Experience superior performance with the BELT DRIVES LTD. Front Pulley, expertly crafted from high-quality aluminum and finished with a hard anodized coating. Proudly made in the U.S.A., this pulley is designed for durability and precision, ensuring...DS360416- SKU:
- DS360416
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PULLEY
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ANODIZED
- TOOTH COUNT:
- 45
- UNITS:
- EACH
- TYPE:
- MOTOR SHAFT
$289.95Qty in Cart: 0Quantity:Price:$289.95Subtotal:
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.
