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 1965-1978 Harley-Davidson FLH 62-40SK-3
BELT DRIVES LTD.
MSRP: $764.62Now: $688.16Was: $764.62If you're running a classic FLH and tired of chain maintenance headaches, this belt drive kit delivers the reliability and smooth operation your vintage Harley deserves. A primary belt system reduces...DS360102- SKU:
- DS360102
- Availability:
- Ships Same Business Day
- Weight:
- 8.69 LBS
- COLOR/FINISH:
- ANODIZED
- TOOTH COUNT:
- 132
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 5/16'
- UNITS:
- KIT
- WIDTH IMPERIAL:
- 1-1/2'
MSRP: $764.62Now: $688.16Was: $764.62 -
On Sale
Belt Drives Ltd 8mm 1.5in Primary Belt Drive Kit for 1955-1957 Harley-Davidson Hydra Glide FL 62-39SK-2
BELT DRIVES LTD.
MSRP: $764.62Now: $688.16Was: $764.62If you're running a kick-start Harley-Davidson Hydra Glide from the mid-1950s, a reliable primary drive system is non-negotiable for consistent performance and longevity. This Belt Drives Ltd 8mm kit...DS360103- SKU:
- DS360103
- Availability:
- Ships Same Business Day
- Weight:
- 8.25 LBS
- COLOR/FINISH:
- ANODIZED
- TOOTH COUNT:
- 132
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 5/16'
- WIDTH IMPERIAL:
- 1-1/2'
- UNITS:
- KIT
MSRP: $764.62Now: $688.16Was: $764.62 -
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: $764.62Now: $688.16Was: $764.62If 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...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: $764.62Now: $688.16Was: $764.62 -
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: $905.38Now: $814.84Was: $905.38If 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...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: $905.38Now: $814.84Was: $905.38 -
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...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: $162.15Now: $145.94Was: $162.15A 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...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: $162.15Now: $145.94Was: $162.15 -
On Sale
Belt Drives Ltd 1-5/8" Belt Drive for 1990-2006 Harley-Davidson Softail and Dyna EVBB-2SL
BELT DRIVES LTD.
MSRP: $1,359.85Now: $1,223.87Was: $1,359.85The 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...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: $1,359.85Now: $1,223.87Was: $1,359.85 -
On Sale
Belt Drives Ltd Clutch Hub for Top Fuel 1990-2006 Softail TFCH-180
BELT DRIVES LTD.
MSRP: $333.85Now: $300.47Was: $333.85When 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...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: $333.85Now: $300.47Was: $333.85 -
On Sale
Belt Drives Ltd Replacement Primary Drive Belt for Harley-Davidson FL 1200 1970-1977 BDL-30853 ST
BELT DRIVES LTD.
MSRP: $105.38Now: $94.84Was: $105.38Primary 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...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: $105.38Now: $94.84Was: $105.38 -
On Sale
Belt Drives Ltd 144 Tooth 8mm x 3in Primary Drive Belt BDL-37144-3
BELT DRIVES LTD.
MSRP: $227.23Now: $204.51Was: $227.23Belt 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...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: $227.23Now: $204.51Was: $227.23 -
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...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
$308.41Qty in Cart: 0Quantity:Price:$308.41Subtotal: -
On Sale
Belt Drives Ltd 2" Open Belt Drive Kit for 2017-2019 Harley-Davidson Touring Models EVO-16BH-2B
BELT DRIVES LTD.
MSRP: $4,731.38Now: $4,258.24Was: $4,731.38If 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...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: $4,731.38Now: $4,258.24Was: $4,731.38 -
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...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...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: $1,359.85Now: $1,223.87Was: $1,359.85If 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...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: $1,359.85Now: $1,223.87Was: $1,359.85 -
On Sale
EASTERN MOTORCYCLE PARTS Chain Tensioner Lock Tab A-39996-65
EASTERN MOTORCYCLE PARTS
Now: $13.47Was: $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...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
Now: $13.47Was: $14.80 -
On Sale
Jims Inner Primary Bearing Seal for Harley-Davidson Big Twin 1990-2006 8961
JIMS
MSRP: $17.75Now: $15.98Was: $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...11200414- SKU:
- 11200414
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- BEARING KIT
- TYPE:
- INNER PRIMARY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $17.75Now: $15.98Was: $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...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...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...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:
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.
