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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On Sale
Belt Drives Ltd 11mm 1-1/2in Primary Belt 92T Harley-Davidson 1941-1984 BDL-5S11
BELT DRIVES LTD.
MSRP: $198.92Now: $179.03Was: $198.92The 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...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: $198.92Now: $179.03Was: $198.92 -
On Sale
BAKER DRIVETRAIN Primary Adjuster Shoe DD6-178
BAKER DRIVETRAIN
MSRP: $49.00Now: $44.10Was: $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
MSRP: $49.00Now: $44.10Was: $49.00 -
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...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...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,...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...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
$26.45A 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...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
$26.45 -
DRAG SPECIALTIES Primary Chain - 428-2 x 76 C226T3/006
DRAG SPECIALTIES
$158.95A 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...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
$158.95 -
DRAG SPECIALTIES Primary Chain - #35-3 x 96 CA35-3S2N/1001
DRAG SPECIALTIES
$157.89Drag 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...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
$157.89 -
DRAG SPECIALTIES Mainshaft Bearing Kit 25-3102
DRAG SPECIALTIES
$32.01A 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...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
$32.01 -
DRAG SPECIALTIES Inner Primary Bearing R16-2RS-W
DRAG SPECIALTIES
$12.16A 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...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
$12.16 -
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...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: $289.95Qty in Cart: 0Quantity:Price:MSRP: $289.95Now: $260.96Was: $289.95Subtotal: -
On Sale
Belt Drives Ltd 3" Front Pulley for 1986-1989 Harley-Davidson Softail Models 47-OFP
BELT DRIVES LTD.
MSRP: $258.00Now: $232.20Was: $258.00Engineered 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...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: $258.00Now: $232.20Was: $258.00 -
On Sale
Belt Drives Ltd 3" Offset Pulley 48 Tooth for 1982-1994 Harley FXR 48-OFP
BELT DRIVES LTD.
MSRP: $258.00Now: $232.20Was: $258.00Proper 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...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: $258.00Now: $232.20Was: $258.00 -
On Sale
Belt Drives Ltd 130 Tooth 8mm x 41mm Primary Drive Belt BDL-130K
BELT DRIVES LTD.
MSRP: $189.38Now: $170.44Was: $189.38A 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...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: $189.38Now: $170.44Was: $189.38Qty in Cart: 0Quantity:Price:MSRP: $189.38Now: $170.44Was: $189.38Subtotal: -
On Sale
Belt Drives Ltd 8mm Primary Drive Belt 138 Teeth for 1970-1983 Harley-Davidson Touring BDL-138-38K
BELT DRIVES LTD.
MSRP: $184.62Now: $166.16Was: $184.62If 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...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: $184.62Now: $166.16Was: $184.62 -
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: $1,533.85Now: $1,380.47Was: $1,533.85If 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...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: $1,533.85Now: $1,380.47Was: $1,533.85 -
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...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: $180.00Now: $162.00Was: $180.00If 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...11200044- SKU:
- 11200044
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- PRODUCT NAME:
- REAR PULLEY COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $180.00Now: $162.00Was: $180.00 -
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: $211.85Now: $190.67Was: $211.85Primary 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...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: $211.85Now: $190.67Was: $211.85
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.
