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 Mini-Dome Pulley Cover Kit for Harley-Davidson FLST Heritage Softail 1986-1989 MD-200
BELT DRIVES LTD.
MSRP: $88.95Now: $80.06Was: $88.95A clean, protected pulley system is essential for both aesthetic appeal and reliable primary drive operation on your Heritage Softail. The Belt Drives Ltd Mini-Dome Pulley Cover Kit delivers OEM-quality protection while giving your motor that finished,...DS360420- SKU:
- DS360420
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- UNITS:
- KIT
- TOOTH COUNT:
- 47
- TOOTH COUNT:
- 76
- TYPE:
- PULLEY
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
MSRP: $88.95Now: $80.06Was: $88.95 -
On Sale
Belt Drives Ltd Starter Housing for 1990-2006 Harley Davidson Softail TFSH-100
BELT DRIVES LTD.
MSRP: $121.95Now: $109.76Was: $121.95If you're running a BDL Belt Drive clutch system on your Softail, the starter housing is your foundation for reliable power transfer and consistent engagement under high RPM loading. A quality housing eliminates slip, vibration, and premature...11200047- SKU:
- 11200047
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- HOUSING
MSRP: $121.95Now: $109.76Was: $121.95 -
On Sale
Belt Drives Ltd 9T Starter Pinion Gear for 1996-2006 Harley Davidson FLHR Road King PG-100A
BELT DRIVES LTD.
MSRP: $156.95Now: $141.26Was: $156.95If you're running a BDL Belt Drive clutch system on your Road King, you need a pinion gear that can handle the demands of real-world riding without compromise. The Belt Drives Ltd PG-100A is precision-machined to ensure consistent power transfer and...11200057- SKU:
- 11200057
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- LENGTH METRIC:
- 115.8 MM
- PRODUCT NAME:
- PINION GEAR
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 9
- UNITS:
- KIT
- LENGTH IMPERIAL:
- 4-9/16'
- LENGTH:
- 115,8 MM (4-9/16')
MSRP: $156.95Now: $141.26Was: $156.95 -
On Sale
Belt Drives Ltd 2" SS Belt Drive Without Cover 1990-2006 Harley-Davidson Softail SS-2
BELT DRIVES LTD.
MSRP: $2,411.95Now: $2,170.76Was: $2,411.95If you're running a 1990-2006 Harley-Davidson Softail and want to eliminate the friction and wear of traditional clutch dogs, this Belt Drives Ltd stainless steel belt drive delivers the smoother engagement and reduced maintenance you need. The one-piece...11200082- SKU:
- 11200082
- Availability:
- Ships Same Business Day
- Weight:
- 36.20 LBS
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BELT DRIVE KIT
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 2'
MSRP: $2,411.95Now: $2,170.76Was: $2,411.95 -
On Sale
Belt Drives Ltd Primary Chain Drive Kit with Ball-Bearing Lockup Clutch for 1990-2006 Harley-Davidson Softail and Dyna Models CDBCS-1-90
BELT DRIVES LTD.
MSRP: $1,344.95Now: $1,210.46Was: $1,344.95The stock primary drive in your 1990-2006 Softail or Dyna wastes power and demands excessive clutch effort—especially if you're pushing your engine's performance envelope. The Belt Drives Ltd Primary Chain Drive Kit replaces that compromise with a...11200179- SKU:
- 11200179
- Availability:
- Ships Same Business Day
- Weight:
- 23.35 LBS
- RIDING STYLE:
- STREET
- FEATURES:
- INCLUDES COMPENSATOR
- UNITS:
- KIT
- TOOTH COUNT:
- 25
- PRODUCT NAME:
- PRIMARY CHAIN DRIVE KIT
MSRP: $1,344.95Now: $1,210.46Was: $1,344.95 -
On Sale
Belt Drives Ltd 3" Belt Drive Kit for 1990-2006 Harley-Davidson Softail Models EVOB-9S
BELT DRIVES LTD.
MSRP: $2,684.95Now: $2,416.46Was: $2,684.95A quality belt drive system directly impacts your Softail's reliability, efficiency, and rideability. The Belt Drives Ltd. EVOB-9S eliminates the maintenance headaches of chain systems while delivering smooth, quiet power delivery to the rear wheel—no...11200251- SKU:
- 11200251
- Availability:
- Ships Same Business Day
- Weight:
- 38.10 LBS
- MATERIAL:
- KEVLAR
- PRODUCT NAME:
- BELT DRIVE KIT
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- MATERIAL:
- STEEL
- WIDTH IMPERIAL:
- 3'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $2,684.95Now: $2,416.46Was: $2,684.95 -
On Sale
Belt Drives Ltd 2" Open Belt Drive Kit for 1990-2006 Harley-Davidson Softail EV-575
BELT DRIVES LTD.
MSRP: $2,556.95Now: $2,301.26Was: $2,556.95If you're running a Softail and want genuine power transfer improvement without compromise, a quality belt drive system isn't optional—it's essential. The Belt Drives Ltd EV-575 delivers measurable performance gains through its ball-bearing lockup clutch...11200226- SKU:
- 11200226
- Availability:
- Ships Same Business Day
- Weight:
- 34.30 LBS
- COLOR/FINISH:
- CHROME
- TOOTH COUNT:
- 142
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 2'
- COLOR/FINISH:
- POLISHED
- MATERIAL:
- KEVLAR
- STYLE:
- RIBBED
- UNITS:
- KIT
MSRP: $2,556.95Now: $2,301.26Was: $2,556.95 -
On Sale
Belt Drives Ltd Belt Drive Kit for 1955-1964 Harley-Davidson Models 61-39SK-2
BELT DRIVES LTD.
MSRP: $627.95Now: $565.16Was: $627.95If you're running a kick-start Harley from the classic era, your primary drive system needs to handle sustained torque without compromise. Belt Drives Ltd's purpose-built kit replaces worn or inadequate stock components with precision-engineered pulley...11200423- SKU:
- 11200423
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
MSRP: $627.95Now: $565.16Was: $627.95 -
On Sale
Belt Drives Ltd 2" Open Belt Drive Kit for 2007-2017 Harley-Davidson Softail and Dyna Models EVO-8S-2
BELT DRIVES LTD.
MSRP: $3,033.95Now: $2,730.56Was: $3,033.95If you're running an EVO engine in your Softail or Dyna, your stock clutch is leaving power on the table. Belt Drives Ltd's open belt drive kit replaces that worn-out assembly with a precision-engineered system that delivers 60% more surface contact...11200229- SKU:
- 11200229
- Availability:
- Ships Same Business Day
- Weight:
- 34.85 LBS
- STYLE:
- RIBBED
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 2'
- COLOR/FINISH:
- POLISHED
- MATERIAL:
- KEVLAR
- PRODUCT NAME:
- BELT DRIVE KIT
- TOOTH COUNT:
- 142
MSRP: $3,033.95Now: $2,730.56Was: $3,033.95Qty in Cart: 0Quantity:Price:MSRP: $3,033.95Now: $2,730.56Was: $3,033.95Subtotal: -
On Sale
Belt Drives Ltd 14mm 1-1/2in Primary Belt 69T Harley-Davidson 1985-1996 FLH FLT FXR PCC-69-112
BELT DRIVES LTD.
MSRP: $236.95Now: $213.26Was: $236.95Primary belt wear is one of the most common failure points in Harley big-twin drives—and a worn belt will rob you of power transfer efficiency and create unpredictable drivetrain behavior. The PCC-69-112 from Belt Drives Ltd. is a direct replacement...DS360016- SKU:
- DS360016
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- STYLE:
- RIBBED
- TYPE:
- PRIMARY
- PRODUCT NAME:
- DRIVE BELT
- TOOTH COUNT:
- 69
- WIDTH IMPERIAL:
- 1-1/2'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $236.95Now: $213.26Was: $236.95Qty in Cart: 0Quantity:Price:MSRP: $236.95Now: $213.26Was: $236.95Subtotal: -
On Sale
Belt Drives Ltd 8mm 3" Primary Belt Drive Kick Start Spline Shaft 1955-1984 76-47-3S
BELT DRIVES LTD.
MSRP: $691.95Now: $622.76Was: $691.95A reliable primary belt drive is fundamental to smooth power delivery and consistent clutch engagement on classic Harley-Davidson and similar platforms. This Belt Drives Ltd kit delivers the durability and precision fit that serious riders demand, with...DS360113- SKU:
- DS360113
- Availability:
- Ships Same Business Day
- Weight:
- 11.90 LBS
- WIDTH IMPERIAL:
- 3'
- TOOTH COUNT:
- 144
- UNITS:
- KIT
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- RIDING STYLE:
- STREET
MSRP: $691.95Now: $622.76Was: $691.95 -
On Sale
Belt Drives Ltd Transmission Pulley 32T for Harley-Davidson Softail Custom FXSTC 1986-1999 TP-32
BELT DRIVES LTD.
MSRP: $202.95Now: $182.66Was: $202.95Upgrading to a lighter transmission pulley directly improves throttle response and reduces parasitic drag on your engine—critical gains for any Big Twin build. The Belt Drives Ltd TP-32 sheds one-third of the weight carried by stock pulleys while...DS360167- SKU:
- DS360167
- Availability:
- Ships Same Business Day
- Weight:
- 3.06 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- 6061 T-6 BILLET ALUMINUM
- TOOTH COUNT:
- 32
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- PULLEY
MSRP: $202.95Now: $182.66Was: $202.95Qty in Cart: 0Quantity:Price:MSRP: $202.95Now: $182.66Was: $202.95Subtotal: -
EASTERN MOTORCYCLE PARTS Bearing - 9231 41-0111
EASTERN MOTORCYCLE PARTS
$49.95Bearing failure in your primary drive system doesn't just compromise performance—it can sideline your bike entirely. This Eastern Motorcycle Parts bearing (9231 41-0111) is engineered as a direct OEM replacement, delivering the precision tolerances and...11200309- SKU:
- 11200309
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING
- TYPE:
- INNER PRIMARY MAINSHAFT
$49.95 -
On Sale
Belt Drives Ltd 3" Belt Drive with Support for Harley-Davidson Softail 1990-2006 EVOB-900
BELT DRIVES LTD.
MSRP: $3,297.95Now: $2,968.16Was: $3,297.95If you're running a Softail and want to eliminate the weak points in your drivetrain, a quality belt drive system is non-negotiable. The Belt Drives Ltd 3" kit replaces sloppy chain systems with smooth, efficient power transfer while the outboard bearing...11200255- SKU:
- 11200255
- Availability:
- Ships Same Business Day
- Weight:
- 44.20 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- POLISHED
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 3'
- MATERIAL:
- 6061-ALUMINUM
- PRODUCT NAME:
- BELT DRIVE KIT
- MATERIAL:
- KEVLAR
MSRP: $3,297.95Now: $2,968.16Was: $3,297.95 -
DRAG SPECIALTIES Compensating Sprocket Shaft Extension - +1-3/8" 346238
DRAG SPECIALTIES
$78.39When running wide tires on your drag setup, stock transmission geometry creates clearance issues that compromise both performance and reliability. This Drag Specialties compensating sprocket shaft extension solves that problem with a precision-engineered...11200002- SKU:
- 11200002
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- PRODUCT NAME:
- SHAFT EXTENSION
- RIDING STYLE:
- STREET
- SIZE IMPERIAL:
- +1-3/8'
- UNITS:
- EACH
- MATERIAL:
- STEEL
- TYPE:
- COMPENSATING SPROCKET
$78.39Qty in Cart: 0Quantity:Price:$78.39Subtotal: -
DRAG SPECIALTIES Primary Drive Kit 210185
DRAG SPECIALTIES
$860.67A primary drive system is the heart of your clutch engagement and power delivery—get it wrong, and you're leaving performance on the table or facing catastrophic failure. The DRAG SPECIALTIES Primary Drive Kit 210185 delivers a complete, engineered...11200077- SKU:
- 11200077
- Availability:
- Ships Same Business Day
- Weight:
- 22.00 LBS
- TOOTH COUNT:
- 36
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PRIMARY CHAIN DRIVE KIT
$860.67 -
DRAG SPECIALTIES Primary Chain Adjusting Shoe 15-0906-SC1
DRAG SPECIALTIES
$16.91A worn or damaged primary chain adjusting shoe compromises your clutch engagement and drivetrain reliability—especially under load. This DRAG Specialties replacement shoe restores precise chain tension and prevents costly slack that leads to premature...DS192003- SKU:
- DS192003
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- PRIMARY CHAIN
- UNITS:
- EACH
- PRODUCT NAME:
- ADJUSTING SHOE
- RIDING STYLE:
- STREET
- MATERIAL:
- NYLON
$16.91Qty in Cart: 0Quantity:Price:$16.91Subtotal: -
DRAG SPECIALTIES Replacement Chain Adjuster Shoe G15-0940K-NU
DRAG SPECIALTIES
$24.33Stock automatic primary chain adjusters can creep over time, leading to excessive chain tension that accelerates wear on your motor sprocket and transmission drive bearings. The DRAG SPECIALTIES manual adjuster eliminates this problem by giving you...11200394- SKU:
- 11200394
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- EACH
- TYPE:
- PRIMARY
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- PRIMARY CHAIN ADJUSTER KIT
- RIDING STYLE:
- STREET
$24.33Qty in Cart: 0Quantity:Price:$24.33Subtotal: -
DRAG SPECIALTIES Compensating Sprocket - 24 Tooth 26-0020-24BXLB1
DRAG SPECIALTIES
$113.37A worn or damaged compensating sprocket compromises engine timing and throttle response, creating inconsistent power delivery and potential drivetrain stress. The DRAG SPECIALTIES 24-tooth compensating sprocket restores precise primary drive engagement,...DS191011- SKU:
- DS191011
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- PRODUCT NAME:
- SPROCKET
- TYPE:
- COMPENSATING
- MATERIAL:
- STEEL
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 24
$113.37 -
DRAG SPECIALTIES Primary Chain Adjuster Nut - XL '04-'17 G15-0941K-NU
DRAG SPECIALTIES
$10.55A properly tensioned primary chain is essential to reliable engine performance and longevity on your Harley-Davidson XL. Loose chain tension leads to premature wear, noise, and potential catastrophic failure—this OEM-spec adjuster nut ensures secure,...11200353- SKU:
- 11200353
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- ZINC
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- ADJUSTER NUT
- UNITS:
- EACH
- TYPE:
- SEALING
$10.55Qty in Cart: 0Quantity:Price:$10.55Subtotal:
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.
