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 8mm 1.5in Primary Belt Drive Kit for 1948-1954 Harley-Davidson FL 62-39TK-1
BELT DRIVES LTD.
MSRP: $627.95Now: $565.16Was: $627.95If you're running a classic Harley-Davidson FL from the late 1930s through mid-1950s, the integrity of your primary drive directly impacts reliability and performance. This Belt Drives Ltd kit replaces worn or failing mechanical systems with...DS360104- SKU:
- DS360104
- Availability:
- Ships Same Business Day
- Weight:
- 8.63 LBS
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ANODIZED
- THICKNESS IMPERIAL:
- 5/16'
- UNITS:
- KIT
- PRODUCT NAME:
- BELT DRIVE KIT
- TOOTH COUNT:
- 132
MSRP: $627.95Now: $565.16Was: $627.95 -
On Sale
Belt Drives Ltd 11mm Belt Drive Kit for 1980-1983 Harley-Davidson Touring and 1982-1983 FXR 47-31SE-5
BELT DRIVES LTD.
MSRP: $693.95Now: $624.56Was: $693.95If you're running a 1980-1983 Harley-Davidson Touring or 1982-1983 FXR, upgrading to a modern belt drive system eliminates the maintenance headaches of chain drive while delivering smoother power transfer and longer service intervals. Belt Drives Ltd's...DS360105- SKU:
- DS360105
- Availability:
- Ships Same Business Day
- Weight:
- 11.38 LBS
- COLOR/FINISH:
- ANODIZED
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BELT DRIVE KIT
- UNITS:
- KIT
MSRP: $693.95Now: $624.56Was: $693.95 -
On Sale
Belt Drives Ltd Transmission Pulley 31 Tooth for 1995-2006 Harley-Davidson Softail FLSTN TP-31
BELT DRIVES LTD.
MSRP: $202.95Now: $182.66Was: $202.95A lighter transmission pulley directly improves throttle response and reduces parasitic drag on your engine, translating to noticeable gains in acceleration and overall drivability. The TP-31's 6061 T-6 aluminum construction cuts weight to one-third that...DS360166- SKU:
- DS360166
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- TOOTH COUNT:
- 31
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- PULLEY
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $202.95Now: $182.66Was: $202.95Qty in Cart: 0Quantity:Price:MSRP: $202.95Now: $182.66Was: $202.95Subtotal: -
On Sale
Belt Drives Ltd Replacement Primary Belt 11mm 99 Teeth for Harley-Davidson FL Models BDL-1185
BELT DRIVES LTD.
MSRP: $132.95Now: $119.66Was: $132.95A worn or damaged primary belt directly compromises power transfer efficiency and reliability—exactly what you can't afford in demanding riding conditions. The BDL-1185 Replacement Primary Belt delivers the precision engineering and durability required...DS360009- SKU:
- DS360009
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- STYLE:
- RIBBED
- PRODUCT NAME:
- DRIVE BELT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 99
- UNITS:
- EACH
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $132.95Now: $119.66Was: $132.95 -
On Sale
Belt Drives Ltd 1-5/8" Belt Drive for 1990-2006 Harley-Davidson Softail and Dyna EVBB-2SL
BELT DRIVES LTD.
MSRP: $1,116.95Now: $1,005.26Was: $1,116.95The Belt Drives Ltd 1-5/8" Belt Drive EVBB-2SL delivers reliable power transfer and smooth clutch engagement for your Softail or Dyna without compromise. This complete system eliminates the guesswork of sourcing individual components, arriving ready for...11200247- SKU:
- 11200247
- Availability:
- Ships Same Business Day
- Weight:
- 16.00 LBS
- MATERIAL:
- KEVLAR
- WIDTH IMPERIAL:
- 1-5/8'
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
MSRP: $1,116.95Now: $1,005.26Was: $1,116.95 -
On Sale
Belt Drives Ltd Clutch Hub for Top Fuel 1990-2006 Softail TFCH-180
BELT DRIVES LTD.
MSRP: $255.95Now: $230.36Was: $255.95When you're running top fuel in a Softail, your clutch hub absorbs extreme rotational forces that demand precision engineering and uncompromising durability. Belt Drives Ltd's TFCH-180 is CNC-machined from high-grade aluminum and hard anodized to...11200035- SKU:
- 11200035
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- COLOR/FINISH:
- ANODIZED
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 3-3/8'
- PRODUCT NAME:
- CLUTCH HUB
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $255.95Now: $230.36Was: $255.95 -
On Sale
Belt Drives Ltd Replacement Primary Drive Belt for Harley-Davidson FL 1200 1970-1977 BDL-30853 ST
BELT DRIVES LTD.
MSRP: $85.95Now: $77.36Was: $85.95Primary drive belt wear is one of the most common culprits behind power loss and unreliable starts on classic Harley-Davidson FL models. The BDL-30853 ST is a precision-engineered replacement belt designed to restore the efficient power transfer between...DS360007- SKU:
- DS360007
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- TOOTH COUNT:
- 132
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- STYLE:
- RIBBED
- PRODUCT NAME:
- DRIVE BELT
- TYPE:
- PRIMARY
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $85.95Now: $77.36Was: $85.95 -
On Sale
Belt Drives Ltd 144 Tooth 8mm x 3in Primary Drive Belt BDL-37144-3
BELT DRIVES LTD.
MSRP: $185.95Now: $167.36Was: $185.95Belt slippage and power loss compromise your drive system's efficiency and reliability. The BDL-37144-3 replacement belt delivers consistent engagement and optimal power transfer, engineered to OEM specifications for your BDL primary drive setup. Replace...DS360014- SKU:
- DS360014
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 144
- TYPE:
- PRIMARY
- PRODUCT NAME:
- DRIVE BELT
- WIDTH IMPERIAL:
- 3'
- STYLE:
- RIBBED
- UNITS:
- EACH
MSRP: $185.95Now: $167.36Was: $185.95 -
DRAG SPECIALTIES Compensating Sprocket Kit 241270-LBX1
DRAG SPECIALTIES
$308.41Compensating sprockets are critical for maintaining consistent engine timing and preventing chain stretch-induced performance loss on high-revving engines. This complete kit delivers the precision engineering needed to keep your drivetrain operating at...DS195197- SKU:
- DS195197
- Availability:
- Ships Same Business Day
- Weight:
- 5.70 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- SPROCKET KIT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 24
- TYPE:
- COMPENSATING
$308.41 -
On Sale
Belt Drives Ltd 2" Open Belt Drive Kit for 2017-2019 Harley-Davidson Touring Models EVO-16BH-2B
BELT DRIVES LTD.
MSRP: $3,884.95Now: $3,496.46Was: $3,884.95If you're running big-inch displacement or forced induction on your 2017-2019 Touring model, your factory belt drive wasn't designed to handle the power you're making. Belt Drives Ltd's EVO-16BH-2B open belt drive kit delivers the durability and...11200399- SKU:
- 11200399
- Availability:
- Ships Same Business Day
- Weight:
- 42.03 LBS
- SIZE IMPERIAL:
- 2'
- COLOR/FINISH:
- BLACK
- TYPE:
- PRIMARY BELT DRIVE
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 52
- TOOTH COUNT:
- 69
MSRP: $3,884.95Now: $3,496.46Was: $3,884.95 -
On Sale
Belt Drives Ltd 3" 8mm Drive Belt for Harley-Davidson Dyna 1991-2005 EVOB-122S
BELT DRIVES LTD.
MSRP: $2,871.95Now: $2,584.76Was: $2,871.95If you're running a Harley-Davidson Dyna and want reliable, smooth power delivery without the maintenance headaches of chain drive, a quality belt system is non-negotiable. The Belt Drives Ltd 3" 8mm Drive Belt EVOB-122S delivers the durability and...11200245- SKU:
- 11200245
- Availability:
- Ships Same Business Day
- Weight:
- 37.60 LBS
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- MATERIAL:
- STEEL
- WIDTH IMPERIAL:
- 3'
- MATERIAL:
- KEVLAR
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $2,871.95Now: $2,584.76Was: $2,871.95Qty in Cart: 0Quantity:Price:MSRP: $2,871.95Now: $2,584.76Was: $2,871.95Subtotal: -
On Sale
Belt Drives Ltd 3" Belt Drive 1986-1989 Softail FXST EVOB-9T
BELT DRIVES LTD.
MSRP: $2,759.95Now: $2,483.96Was: $2,759.95If you're running a 1986-1989 Softail FXST, your belt drive is the critical link between engine and rear wheel—and a worn or inadequate system kills both reliability and performance. The Belt Drives Ltd EVOB-9T delivers precise power transfer with...11200252- SKU:
- 11200252
- Availability:
- Ships Same Business Day
- Weight:
- 37.90 LBS
- MATERIAL:
- KEVLAR
- PRODUCT NAME:
- BELT DRIVE KIT
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- MATERIAL:
- STEEL
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 3'
MSRP: $2,759.95Now: $2,483.96Was: $2,759.95Qty in Cart: 0Quantity:Price:MSRP: $2,759.95Now: $2,483.96Was: $2,759.95Subtotal: -
On Sale
Belt Drives Ltd 1-5/8" Belt Drive with Chain for 1980-1983 Harley-Davidson Tour Glide FLT EVBB-3T-5
BELT DRIVES LTD.
MSRP: $1,116.95Now: $1,005.26Was: $1,116.95If you're running a 1980-1983 Tour Glide FLT, this Belt Drives Ltd system delivers the reliability and smooth power delivery that separates a dialed-in machine from a maintenance headache. A quality belt drive eliminates chain stretch, reduces vibration,...11200253- SKU:
- 11200253
- Availability:
- Ships Same Business Day
- Weight:
- 15.80 LBS
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- MATERIAL:
- STEEL
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 1-5/8'
- MATERIAL:
- KEVLAR
MSRP: $1,116.95Now: $1,005.26Was: $1,116.95 -
EASTERN MOTORCYCLE PARTS Chain Tensioner Lock Tab A-39996-65
EASTERN MOTORCYCLE PARTS
$14.80A properly tensioned chain is fundamental to reliable motorcycle performance and longevity. This Eastern Motorcycle Parts chain tensioner lock tab secures your chain tension adjustment, preventing unwanted slippage that compromises power delivery and...11200189- SKU:
- 11200189
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- LOCK TAB
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY CHAIN
- TYPE:
- ADJUSTER PLATE
$14.80 -
Jims Inner Primary Bearing Seal for Harley-Davidson Big Twin 1990-2006 8961
JIMS
$17.75A failing inner primary bearing seal is one of the most common sources of oil weeping in Big Twin motors—and it's a problem that compounds quickly if left unaddressed. The JIMS 8961 replaces the original seal with precision-engineered construction that...11200414- SKU:
- 11200414
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- BEARING KIT
- TYPE:
- INNER PRIMARY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$17.75 -
DRAG SPECIALTIES Chain Tensioner Mount 18120-BX-LB1
DRAG SPECIALTIES
$83.69A worn or antiquated chain tensioner can compromise drivetrain alignment and accelerate sprocket wear. This complete DRAG SPECIALTIES kit delivers a straightforward solution whether you're restoring a vintage build or assembling a custom harley from...DS181201- SKU:
- DS181201
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
- PRODUCT NAME:
- CHAIN ADJUSTER KIT
- MATERIAL:
- NYLON
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY CHAIN
- UNITS:
- KIT
$83.69 -
GARDNER-WESTCOTT Primary Cover Hardware P-10-24-08N
GARDNER-WESTCOTT
$67.95Your primary cover hardware is one of the first things fellow riders notice—and it's the first line of defense against dirt, debris, and moisture entering your engine. The GARDNER-WESTCOTT P-10-24-08N delivers genuine chrome-plated socket-head bolts that...DS175009- SKU:
- DS175009
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BOLT KIT
- COLOR/FINISH:
- CHROME
- TYPE:
- PRIMARY COVER
- MATERIAL:
- STEEL
- UNITS:
- KIT
$67.95Qty in Cart: 0Quantity:Price:$67.95Subtotal: -
GARDNER-WESTCOTT Primary Cover Hardware P-10-17-08
GARDNER-WESTCOTT
$67.95A quality primary cover hardware kit is essential for maintaining proper engine sealing and ensuring your cover fasteners won't corrode or seize over time. The GARDNER-WESTCOTT P-10-17-08 delivers polished chrome socket-head bolts that resist weather and...DS175008- SKU:
- DS175008
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- MATERIAL:
- STEEL
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- BOLT KIT
- RIDING STYLE:
- STREET
$67.95Qty in Cart: 0Quantity:Price:$67.95Subtotal: -
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 polished chrome socket-head bolts that secure your primary,...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 with precision-engineered components built to handle...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:
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.
