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Harley Primary Drive Systems and Parts

Harley Primary Drive Systems and Parts

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

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
  • On Sale
    Belt Drives Ltd 96 Tooth 11mm x 1-1/2in Primary Drive Belt BDL-30884

    Belt Drives Ltd 96 Tooth 11mm x 1-1/2in Primary Drive Belt BDL-30884

    BELT DRIVES LTD.

    MSRP: $172.92
    Now: $164.27
    Was: $172.92
    The BDL-30884 Replacement Belt is designed specifically for BDL primary drives, ensuring optimal performance and durability. This high-quality belt offers a reliable solution for maintaining the...
    DS360011
    SKU:
    DS360011
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    PRODUCT NAME:
    DRIVE BELT
    TYPE:
    PRIMARY
    WIDTH IMPERIAL:
    1-1/2'
    STYLE:
    RIBBED
    TOOTH COUNT:
    96
    MSRP: $172.92
    Now: $164.27
    Was: $172.92
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $172.92
    Now: $164.27
    Was: $172.92
    Subtotal:
  • On Sale
    Belt Drives Ltd 30 Tooth Transmission Pulley TP-30

    Belt Drives Ltd 30 Tooth Transmission Pulley TP-30

    BELT DRIVES LTD.

    MSRP: $265.23
    Now: $251.97
    Was: $265.23
    Reducing unsprung weight at the transmission improves acceleration response and reduces rotational inertia—critical gains for both street and track applications. The Belt Drives Ltd TP-30 delivers...
    DS360165
    SKU:
    DS360165
    Availability:
    Ships Same Business Day
    Weight:
    2.69 LBS
    MATERIAL:
    6061 T-6 BILLET ALUMINUM
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    COLOR/FINISH:
    ANODIZED
    PRODUCT NAME:
    PULLEY
    TOOTH COUNT:
    30
    MSRP: $265.23
    Now: $251.97
    Was: $265.23
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $265.23
    Now: $251.97
    Was: $265.23
    Subtotal:
  • On Sale
    Belt Drives Ltd 8mm 144 Tooth Primary Belt for 1955-1984 Harley-Davidson FL Models BDL-37144-1

    Belt Drives Ltd 8mm 144 Tooth Primary Belt for 1955-1984 Harley-Davidson FL Models BDL-37144-1

    BELT DRIVES LTD.

    MSRP: $105.38
    Now: $100.11
    Was: $105.38
    If you're running a classic Harley-Davidson FL with a BDL primary drive, belt degradation directly impacts power delivery and reliability. This OEM replacement belt restores the precision fit and...
    DS360012
    SKU:
    DS360012
    Availability:
    Ships Same Business Day
    Weight:
    0.70 LBS
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    STYLE:
    RIBBED
    TOOTH COUNT:
    144
    PRODUCT NAME:
    DRIVE BELT
    TYPE:
    PRIMARY
    WIDTH IMPERIAL:
    1-1/2'
    MSRP: $105.38
    Now: $100.11
    Was: $105.38
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $105.38
    Now: $100.11
    Was: $105.38
    Subtotal:
  • On Sale
    Belt Drives Ltd Replacement Primary Belt 144 Tooth 2 Inch Wide for Harley-Davidson FL 1955-1964 BDL-37144-2

    Belt Drives Ltd Replacement Primary Belt 144 Tooth 2 Inch Wide for Harley-Davidson FL 1955-1964 BDL-37144-2

    BELT DRIVES LTD.

    MSRP: $144.46
    Now: $137.24
    Was: $144.46
    If your Harley FL primary drive is showing signs of belt wear or slippage, you're losing power delivery efficiency and risking catastrophic drive failure. The BDL-37144-2 replacement belt restores...
    DS360013
    SKU:
    DS360013
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    RIDING STYLE:
    STREET
    TOOTH COUNT:
    144
    WIDTH IMPERIAL:
    2'
    UNITS:
    EACH
    PRODUCT NAME:
    DRIVE BELT
    TYPE:
    PRIMARY
    STYLE:
    RIBBED
    MSRP: $144.46
    Now: $137.24
    Was: $144.46
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $144.46
    Now: $137.24
    Was: $144.46
    Subtotal:
  • On Sale
    Belt Drives Ltd 78 Tooth 14mm Primary Drive Belt for Harley-Davidson FL 1946-1952 BDL-38078

    Belt Drives Ltd 78 Tooth 14mm Primary Drive Belt for Harley-Davidson FL 1946-1952 BDL-38078

    BELT DRIVES LTD.

    MSRP: $288.77
    Now: $274.33
    Was: $288.77
    Primary belt wear is inevitable on vintage Harley FL models, and a slipping or degraded belt directly compromises throttle response and overall drivetrain efficiency. The Belt Drives Ltd BDL-38078...
    DS360015
    SKU:
    DS360015
    Availability:
    Ships Same Business Day
    Weight:
    0.81 LBS
    STYLE:
    RIBBED
    TOOTH COUNT:
    78
    TYPE:
    PRIMARY
    PRODUCT NAME:
    DRIVE BELT
    WIDTH IMPERIAL:
    1-1/2'
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    MSRP: $288.77
    Now: $274.33
    Was: $288.77
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $288.77
    Now: $274.33
    Was: $288.77
    Subtotal:
  • On Sale
    Belt Drives Ltd 11mm Belt Drive Kit for 1955-1964 Harley-Davidson FLH 47-31SK-2

    Belt Drives Ltd 11mm Belt Drive Kit for 1955-1964 Harley-Davidson FLH 47-31SK-2

    BELT DRIVES LTD.

    MSRP: $764.62
    Now: $726.39
    Was: $764.62
    If you're running a classic FLH and still relying on an outdated chain drive, you're sacrificing reliability and adding unnecessary maintenance to your riding schedule. This 11mm belt drive kit...
    DS360108
    SKU:
    DS360108
    Availability:
    Ships Same Business Day
    Weight:
    8.90 LBS
    PRODUCT NAME:
    BELT DRIVE KIT
    COLOR/FINISH:
    ANODIZED
    UNITS:
    KIT
    WIDTH IMPERIAL:
    1-1/2'
    MATERIAL:
    ALUMINUM
    RIDING STYLE:
    STREET
    MSRP: $764.62
    Now: $726.39
    Was: $764.62
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $764.62
    Now: $726.39
    Was: $764.62
    Subtotal:
  • On Sale
    Belt Drives Ltd 8mm 2in Primary Belt Drive Kit for 1955-1984 Harley-Davidson Kick Start Models 76-47-2S

    Belt Drives Ltd 8mm 2in Primary Belt Drive Kit for 1955-1984 Harley-Davidson Kick Start Models 76-47-2S

    BELT DRIVES LTD.

    MSRP: $850.92
    Now: $808.37
    Was: $850.92
    If you're running a kick-start Harley from the golden age of American motorcycling, you know that stock primary drives weren't engineered for reliability. Belt Drives Ltd's 8mm 2" primary belt drive...
    DS360115
    SKU:
    DS360115
    Availability:
    Ships Same Business Day
    Weight:
    11.25 LBS
    PRODUCT NAME:
    BELT DRIVE KIT
    THICKNESS IMPERIAL:
    5/16'
    UNITS:
    KIT
    COLOR/FINISH:
    ANODIZED
    MATERIAL:
    ALUMINUM
    RIDING STYLE:
    STREET
    TOOTH COUNT:
    144
    WIDTH IMPERIAL:
    2'
    MSRP: $850.92
    Now: $808.37
    Was: $850.92
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $850.92
    Now: $808.37
    Was: $850.92
    Subtotal:
  • On Sale
    Belt Drives Ltd 3" Front Pulley 47 Tooth for 1984-1989 Harley-Davidson Softail 47EV-3

    Belt Drives Ltd 3" Front Pulley 47 Tooth for 1984-1989 Harley-Davidson Softail 47EV-3

    BELT DRIVES LTD.

    MSRP: $289.33
    Now: $274.86
    Was: $289.33
    Your Softail's belt drive system demands precise pulley geometry to maintain proper tension, power delivery, and longevity. The Belt Drives Ltd 3" Front Pulley delivers the exact 47-tooth profile...
    DS360122
    SKU:
    DS360122
    Availability:
    Ships Same Business Day
    Weight:
    3.40 LBS
    COLOR/FINISH:
    ANODIZED
    UNITS:
    EACH
    MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    PULLEY
    RIDING STYLE:
    STREET
    TOOTH COUNT:
    47
    TYPE:
    MOTOR SHAFT
    MSRP: $289.33
    Now: $274.86
    Was: $289.33
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $289.33
    Now: $274.86
    Was: $289.33
    Subtotal:
  • On Sale
    Belt Drives Ltd 11mm Belt Drive Kit for 1965-1984 Harley-Davidson Shovelhead Electric Start 4-Speed 47-31SE-4

    Belt Drives Ltd 11mm Belt Drive Kit for 1965-1984 Harley-Davidson Shovelhead Electric Start 4-Speed 47-31SE-4

    BELT DRIVES LTD.

    MSRP: $905.38
    Now: $860.11
    Was: $905.38
    If you're running a carbureted Shovelhead with an electric starter, a belt drive system eliminates the mechanical complexity of traditional chain drives while delivering smoother power delivery and...
    DS360106
    SKU:
    DS360106
    Availability:
    Ships Same Business Day
    Weight:
    11.25 LBS
    WIDTH IMPERIAL:
    1-1/2'
    UNITS:
    KIT
    COLOR/FINISH:
    ANODIZED
    MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    BELT DRIVE KIT
    RIDING STYLE:
    STREET
    MSRP: $905.38
    Now: $860.11
    Was: $905.38
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $905.38
    Now: $860.11
    Was: $905.38
    Subtotal:
  • On Sale
    Belt Drives Ltd 11mm Belt Drive Kit for 1965-1984 Harley-Davidson Shovelhead Kick Start Spline Shaft 47-31SK-3

    Belt Drives Ltd 11mm Belt Drive Kit for 1965-1984 Harley-Davidson Shovelhead Kick Start Spline Shaft 47-31SK-3

    BELT DRIVES LTD.

    MSRP: $826.15
    Now: $784.84
    Was: $826.15
    If you're running a classic Shovelhead with a kick-start spline shaft, the belt drive system is critical to reliable engine starting and overall drivetrain longevity. Belt Drives Ltd's 11mm kit...
    DS360107
    SKU:
    DS360107
    Availability:
    Ships Same Business Day
    Weight:
    10.13 LBS
    WIDTH IMPERIAL:
    1-1/2'
    RIDING STYLE:
    STREET
    UNITS:
    KIT
    MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    BELT DRIVE KIT
    COLOR/FINISH:
    ANODIZED
    MSRP: $826.15
    Now: $784.84
    Was: $826.15
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $826.15
    Now: $784.84
    Was: $826.15
    Subtotal:
  • On Sale
    Belt Drives Ltd 11mm Belt Drive Kit for 1948-1954 Harley-Davidson FL 47-31TK-1

    Belt Drives Ltd 11mm Belt Drive Kit for 1948-1954 Harley-Davidson FL 47-31TK-1

    BELT DRIVES LTD.

    MSRP: $764.62
    Now: $726.39
    Was: $764.62
    If you're running a classic Harley-Davidson FL from the pre-1955 era, a belt drive conversion eliminates the maintenance headaches of chain lubrication while delivering smoother power delivery to the...
    DS360109
    SKU:
    DS360109
    Availability:
    Ships Same Business Day
    Weight:
    8.80 LBS
    PRODUCT NAME:
    BELT DRIVE KIT
    UNITS:
    KIT
    MATERIAL:
    ALUMINUM
    RIDING STYLE:
    STREET
    COLOR/FINISH:
    ANODIZED
    WIDTH IMPERIAL:
    1-1/2'
    MSRP: $764.62
    Now: $726.39
    Was: $764.62
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $764.62
    Now: $726.39
    Was: $764.62
    Subtotal:
  • On Sale
    Belt Drives Ltd Compensator Sprocket 25 Tooth Harley-Davidson Softail 1984-1993 CS-25A-1

    Belt Drives Ltd Compensator Sprocket 25 Tooth Harley-Davidson Softail 1984-1993 CS-25A-1

    BELT DRIVES LTD.

    MSRP: $178.77
    Now: $169.83
    Was: $178.77
    Stock compensator sprockets rely on springs that wear out, absorb power, and complicate maintenance. The Belt Drives Ltd Compensator Sprocket eliminates this weakness with a three-piece design that...
    11015001
    SKU:
    11015001
    Availability:
    Ships Same Business Day
    Weight:
    3.55 LBS
    RIDING STYLE:
    STREET
    TYPE:
    COMPENSATING
    PRODUCT NAME:
    SPROCKET
    TOOTH COUNT:
    25
    UNITS:
    EACH
    MSRP: $178.77
    Now: $169.83
    Was: $178.77
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $178.77
    Now: $169.83
    Was: $178.77
    Subtotal:
  • On Sale
    Belt Drives Ltd 33T Transmission Pulley for 1985-2006 Harley Big Twin TP-33

    Belt Drives Ltd 33T Transmission Pulley for 1985-2006 Harley Big Twin TP-33

    BELT DRIVES LTD.

    MSRP: $265.23
    Now: $251.97
    Was: $265.23
    Reducing parasitic drag on your drivetrain directly translates to measurable gains in acceleration and fuel efficiency. The Belt Drives Ltd TP-33 transmission pulley sheds approximately two-thirds of...
    DS360168
    SKU:
    DS360168
    Availability:
    Ships Same Business Day
    Weight:
    3.15 LBS
    PRODUCT NAME:
    PULLEY
    RIDING STYLE:
    STREET
    COLOR/FINISH:
    ANODIZED
    UNITS:
    EACH
    MATERIAL:
    6061 T-6 BILLET ALUMINUM
    TOOTH COUNT:
    33
    MSRP: $265.23
    Now: $251.97
    Was: $265.23
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $265.23
    Now: $251.97
    Was: $265.23
    Subtotal:
  • On Sale
    Belt Drives Ltd Top Fuel Street Drive Replacement Belt for Harley-Davidson FLSTF Fat Boy 1990-2006 BDL-14-85

    Belt Drives Ltd Top Fuel Street Drive Replacement Belt for Harley-Davidson FLSTF Fat Boy 1990-2006 BDL-14-85

    BELT DRIVES LTD.

    MSRP: $410.77
    Now: $390.23
    Was: $410.77
    Primary drive belts are critical wear items on any Harley-Davidson—inadequate power transfer and premature belt failure directly impact reliability and performance. The Belt Drives Ltd Top Fuel...
    DS360192
    SKU:
    DS360192
    Availability:
    Ships Same Business Day
    Weight:
    2.15 LBS
    RIDING STYLE:
    STREET
    TOOTH COUNT:
    85
    UNITS:
    EACH
    WIDTH IMPERIAL:
    3-3/8'
    STYLE:
    RIBBED
    PRODUCT NAME:
    DRIVE BELT
    TYPE:
    PRIMARY
    MSRP: $410.77
    Now: $390.23
    Was: $410.77
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $410.77
    Now: $390.23
    Was: $410.77
    Subtotal:
  • On Sale
    Belt Drives Ltd 1.5" 70 Tooth Mesh Pulley for Harley-Davidson Softail Springer 1995-1997 RPMS-70 Belt Drives Ltd 1.5" 70 Tooth Mesh Pulley for Harley-Davidson Softail Springer 1995-1997 RPMS-70

    Belt Drives Ltd 1.5" 70 Tooth Mesh Pulley for Harley-Davidson Softail Springer 1995-1997 RPMS-70

    BELT DRIVES LTD.

    MSRP: $645.08
    Now: $612.83
    Was: $645.08
    Experience superior performance with the BELT DRIVES LTD. 1.50" Pulley Mesh 70 Tooth RPMS-70. Crafted from high-quality CNC billet aluminum, this pulley ensures durability and precision for your...
    DS325842
    SKU:
    DS325842
    Availability:
    Ships Same Business Day
    Weight:
    6.25 LBS
    UNITS:
    EACH
    PRODUCT NAME:
    PULLEY
    TOOTH COUNT:
    70
    MATERIAL:
    BILLET ALUMINUM
    COLOR/FINISH:
    CHROME
    MODEL:
    MESH
    RIDING STYLE:
    STREET
    WIDTH IMPERIAL:
    1-1/2'
    MSRP: $645.08
    Now: $612.83
    Was: $645.08
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $645.08
    Now: $612.83
    Was: $645.08
    Subtotal:
  • On Sale
    Belt Drives Ltd 132 Tooth 1-3/4" Primary Belt for 1972-1984 Harley-Davidson FX Models BDL-132

    Belt Drives Ltd 132 Tooth 1-3/4" Primary Belt for 1972-1984 Harley-Davidson FX Models BDL-132

    BELT DRIVES LTD.

    MSRP: $130.31
    Now: $123.79
    Was: $130.31
    Upgrade your BDL primary drive system with the BDL-132 Replacement Belt, engineered for optimal performance and durability. This high-quality belt ensures smooth operation and enhances the efficiency...
    DS360001
    SKU:
    DS360001
    Availability:
    Ships Same Business Day
    Weight:
    0.56 LBS
    PRODUCT NAME:
    DRIVE BELT
    STYLE:
    RIBBED
    TOOTH COUNT:
    132
    TYPE:
    PRIMARY
    WIDTH IMPERIAL:
    1-3/4'
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    MSRP: $130.31
    Now: $123.79
    Was: $130.31
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $130.31
    Now: $123.79
    Was: $130.31
    Subtotal:
  • On Sale
    Belt Drives Ltd 141 Tooth 1-3/4" Primary Drive Belt for 1990-2006 Harley-Davidson Softail BDL-141

    Belt Drives Ltd 141 Tooth 1-3/4" Primary Drive Belt for 1990-2006 Harley-Davidson Softail BDL-141

    BELT DRIVES LTD.

    MSRP: $130.31
    Now: $123.79
    Was: $130.31
    Enhance the performance of your BDL primary drives with the BDL-141 Replacement Belt. Engineered for durability and precision, this belt ensures smooth operation and optimal power transfer, making it...
    DS360002
    SKU:
    DS360002
    Availability:
    Ships Same Business Day
    Weight:
    0.69 LBS
    PRODUCT NAME:
    DRIVE BELT
    STYLE:
    RIBBED
    TOOTH COUNT:
    141
    TYPE:
    PRIMARY
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    WIDTH IMPERIAL:
    1-3/4'
    MSRP: $130.31
    Now: $123.79
    Was: $130.31
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $130.31
    Now: $123.79
    Was: $130.31
    Subtotal:
  • On Sale
    Belt Drives Ltd 141 Tooth 1-5/8" Primary Drive Belt for 1986-1999 Harley-Davidson Softail BDL-141-1-5/8

    Belt Drives Ltd 141 Tooth 1-5/8" Primary Drive Belt for 1986-1999 Harley-Davidson Softail BDL-141-1-5/8

    BELT DRIVES LTD.

    MSRP: $106.95
    Now: $101.60
    Was: $106.95
    Upgrade your BDL primary drive with the high-performance Replacement Belt BDL-141-1-5/8. Designed for durability and efficiency, this belt ensures smooth operation and longevity, making it an...
    DS360004
    SKU:
    DS360004
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    PRODUCT NAME:
    DRIVE BELT
    WIDTH IMPERIAL:
    1-5/8'
    RIDING STYLE:
    STREET
    TYPE:
    PRIMARY
    UNITS:
    EACH
    STYLE:
    RIBBED
    TOOTH COUNT:
    141
    MSRP: $106.95
    Now: $101.60
    Was: $106.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $106.95
    Now: $101.60
    Was: $106.95
    Subtotal:
  • On Sale
    Belt Drives Ltd 1990-2002 Harley-Davidson Softail 3" Primary Drive Belt BDL-141-3

    Belt Drives Ltd 1990-2002 Harley-Davidson Softail 3" Primary Drive Belt BDL-141-3

    BELT DRIVES LTD.

    MSRP: $227.23
    Now: $215.87
    Was: $227.23
    The BDL-141-3 Replacement Belt from Belt Drives Ltd. is engineered for optimal performance in BDL primary drive systems. Designed for durability and reliability, this belt ensures smooth operation...
    DS360005
    SKU:
    DS360005
    Availability:
    Ships Same Business Day
    Weight:
    1.19 LBS
    UNITS:
    EACH
    WIDTH IMPERIAL:
    3'
    RIDING STYLE:
    STREET
    TYPE:
    PRIMARY
    STYLE:
    RIBBED
    TOOTH COUNT:
    141
    PRODUCT NAME:
    DRIVE BELT
    MSRP: $227.23
    Now: $215.87
    Was: $227.23
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $227.23
    Now: $215.87
    Was: $227.23
    Subtotal:
  • On Sale
    Belt Drives Ltd 3in Rubber Belt for 2000-2002 Harley-Davidson FLTR Road Glide BDL-132-3

    Belt Drives Ltd 3in Rubber Belt for 2000-2002 Harley-Davidson FLTR Road Glide BDL-132-3

    BELT DRIVES LTD.

    MSRP: $204.77
    Now: $194.53
    Was: $204.77
    Enhance the performance of your BDL primary drives with the BDL-132-3 Replacement Belt. Engineered for durability and precision, this belt ensures a reliable power transfer for optimal efficiency...
    DS360006
    SKU:
    DS360006
    Availability:
    Ships Same Business Day
    Weight:
    1.05 LBS
    UNITS:
    EACH
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    DRIVE BELT
    TOOTH COUNT:
    132
    TYPE:
    PRIMARY
    WIDTH IMPERIAL:
    3'
    STYLE:
    RIBBED
    MSRP: $204.77
    Now: $194.53
    Was: $204.77
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $204.77
    Now: $194.53
    Was: $204.77
    Subtotal:
  • Total: items /

Adding your products to cart

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)

  1. 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.
  2. 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.
  3. 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.
  4. Are tensioners necessary for primary chains? Yes, manual tensioners like Powerstands Racing prevent over-tightening, with billet aluminum construction for easy adjustments.
  5. 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.
  6. 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.

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

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Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

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