Harley Drivetrain
Harley Bike Drivetrain Parts at JJ Motorsports
Upgrade your Harley's drivetrain for smoother power delivery and reliability with components from JJ Motorsports. Our selection includes transmission mounting plates, offset sprockets, mechanical reverse kits, starter spacers, pulley spacers, and primary covers designed for heavy-duty use, easy bolt-in installation, and enhanced performance. Compatible with Big Twins, Softail, Dyna, and more, these parts feature chrome finishes, billet aluminum, and CNC-machined steel for corrosion resistance and custom fitment.
Shop trusted brands like Paughco for primary covers and PBI for sprockets. Explore related categories such as Harley engine parts for rebuilds or Harley suspension for balanced setups.
Top Harley Drivetrain Products
- PAUGHCO Transmission Plate - OE Type 4-Speed 218 – Heavy-duty steel for Big Twins with 4-speed transmissions.
- PBI Offset Transmission Sprocket - 22-Tooth 281-22 – CNC-machined chromoly steel with 0.750" offset for 530 chains.
- MOTOR TRIKE Mechanical Reverse Kit MTTR-0025 – Lightweight aluminum with electronic cut-off for easy parking.
- TERRY COMPONENTS Starter Spacer 779000 – Billet aluminum, 1-1/2" thick for longer starters.
- PINGEL Rear Pulley Spacer 62051 – Billet aluminum for wider tires up to 142mm.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
DRAG SPECIALTIES Wrinkle Black Derby Cover D33-0110WB
DRAG SPECIALTIES
$81.95A quality derby cover protects your primary cover from road debris and UV exposure while adding a finished aesthetic to your engine bay. This die-cast Drag Specialties cover combines durability with a sleek wrinkle black finish that complements modern...11070558- SKU:
- 11070558
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- COLOR/FINISH:
- WRINKLE BLACK
- MOUNTING STYLE:
- 5 HOLE
- MATERIAL:
- ALUMINUM
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- DERBY COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$81.95 -
DRAG SPECIALTIES Primary Tension Shoe 15-0986
DRAG SPECIALTIES
$17.97Stock nylon primary tension shoes wear quickly under sustained load, compromising clutch engagement consistency and shifting reliability. This OEM-equivalent replacement restores factory performance standards without the expense of a full clutch assembly...11200079- SKU:
- 11200079
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- ADJUSTING SHOE
- TYPE:
- PRIMARY CHAIN
$17.97Qty in Cart: 0Quantity:Price:$17.97Subtotal: -
DRAG SPECIALTIES Primary Chain Adjuster Kit G15-0940K
DRAG SPECIALTIES
$218.31Stock automatic primary chain adjusters can over-tighten over time, accelerating wear on your motor sprocket and transmission drive bearings—two components you can't afford to compromise. This manual adjuster kit gives you precise control, allowing you...11200393- SKU:
- 11200393
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- PRIMARY CHAIN ADJUSTER KIT
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
$218.31 -
DRAG SPECIALTIES Compensator Kit D26-0145K
DRAG SPECIALTIES
$436.67High-performance launches demand a compensator that can absorb extreme torque spikes without sacrificing reliability. This DRAG SPECIALTIES kit features increased travel and a heavy-duty spring pack to protect your motor and drivetrain from the shock of...11200404- SKU:
- 11200404
- Availability:
- Ships Same Business Day
- Weight:
- 11.35 LBS
- TOOTH COUNT:
- 34
- UNITS:
- KIT
- PRODUCT NAME:
- COMPENSATOR
- RIDING STYLE:
- STREET
$436.67Qty in Cart: 0Quantity:Price:$436.67Subtotal: -
DRAG SPECIALTIES Chrome Derby Cover 33-0067
DRAG SPECIALTIES
$72.95A polished derby cover transforms your engine's appearance while protecting critical internal components from contamination and debris. This die-cast chrome piece is built tough enough for the street or strip, delivering a finished look that complements...11070006- SKU:
- 11070006
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- DIE-CAST
- MOUNTING STYLE:
- 6 HOLE
$72.95 -
DRAG SPECIALTIES Primary Chain Adjuster G15-0941K
DRAG SPECIALTIES
$67.79Proper primary chain tension is critical for reliable power transfer and longevity in high-performance engines. A worn or damaged adjuster compromises your chain's alignment and can lead to accelerated wear, noise, and potential failure under load. The...11200352- SKU:
- 11200352
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- COLOR/FINISH:
- ZINC
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY CHAIN
- PRODUCT NAME:
- CHAIN ADJUSTER KIT
- UNITS:
- EACH
- MATERIAL:
- STEEL
$67.79Qty in Cart: 0Quantity:Price:$67.79Subtotal: -
DRAG SPECIALTIES Chrome Derby Cover 33-0017K-BC427
DRAG SPECIALTIES
$49.95A derby cover serves as both protective hardware and a visual accent on your Big Twin engine—keeping debris and moisture away from critical internals while adding polish to your build. This Drag Specialties chrome piece delivers a factory-quality fit...DS375650- SKU:
- DS375650
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- DIE-CAST
- MOUNTING STYLE:
- 3 HOLE
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
On Sale
S&S CYCLE Trap Door 56-1027
S&S CYCLE
MSRP: $519.95Now: $467.96Was: $519.95The S&S Cycle Trap Door (56-1027) is engineered for riders who demand reliable, precision-built components that integrate seamlessly with high-performance engine systems. This billet construction piece eliminates common air leakage issues while...561027- SKU:
- 561027
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- TRANSMISSION TYPE:
- 5-SPEED
- TYPE:
- TRANSMISSION
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- TRAP DOOR
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $519.95Now: $467.96Was: $519.95 -
On Sale
S&S CYCLE Transmission Door 56-1025
S&S CYCLE
MSRP: $443.95Now: $399.56Was: $443.95A transmission door serves as a critical access point for routine maintenance, fluid checks, and internal inspections on your Harley-Davidson. The S&S Cycle Transmission Door 56-1025 replaces worn or damaged OEM doors with a billet-aluminum component...11050229- SKU:
- 11050229
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- CASE
- UNITS:
- EACH
MSRP: $443.95Now: $399.56Was: $443.95 -
On Sale
S&S CYCLE Final Drive Belt - 135-Tooth - 1 1/2" 106-0354
S&S CYCLE
MSRP: $275.95Now: $248.36Was: $275.95A reliable final drive belt is critical to maintaining consistent power delivery and preventing catastrophic drivetrain failure on your machine. The S&S Cycle 135-tooth belt uses Gates Carbon X3N material—a premium compound engineered to resist heat,...12040099- SKU:
- 12040099
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 1-1/2'
- TOOTH COUNT:
- 135
- MATERIAL:
- X3N CARBON
- PRODUCT NAME:
- BELT
- UNITS:
- EACH
- TYPE:
- REAR DRIVE
MSRP: $275.95Now: $248.36Was: $275.95Qty in Cart: 0Quantity:Price:MSRP: $275.95Now: $248.36Was: $275.95Subtotal: -
On Sale
S&S CYCLE Inner Primary Bearing Race 560-0241
S&S CYCLE
MSRP: $82.95Now: $74.66Was: $82.95Transmission bearing race movement is a silent killer in high-performance applications—it compromises seal integrity and accelerates output bearing wear, leading to catastrophic failure. The S&S CYCLE Inner Primary Bearing Race eliminates this play with...11200335- SKU:
- 11200335
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING RACE
MSRP: $82.95Now: $74.66Was: $82.95 -
DRAG SPECIALTIES Drive Pulley Installation Kit 191384-HC4
DRAG SPECIALTIES
$37.40A properly secured drive pulley is critical to reliable forced induction performance—improper fastening can lead to boost loss, belt slippage, or catastrophic compressor failure. The DRAG SPECIALTIES Drive Pulley Installation Kit ensures your...12030009- SKU:
- 12030009
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PULLEY
- PRODUCT NAME:
- INSTALLATION KIT
- UNITS:
- KIT
$37.40 -
DRAG SPECIALTIES Clutch Basket 148422
DRAG SPECIALTIES
$436.67A worn or damaged clutch basket compromises your engine's power delivery and risks catastrophic internal damage. The DRAG SPECIALTIES Clutch Basket 148422 restores precise clutch engagement and reliability, whether you're building a high-revving race...11321583- SKU:
- 11321583
- Availability:
- Ships Same Business Day
- Weight:
- 4.80 LBS
- PRODUCT NAME:
- CLUTCH BASKET
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$436.67 -
DRAG SPECIALTIES Clutch Release Kit 144005
DRAG SPECIALTIES
$55.07A worn or damaged clutch release system compromises your ability to make clean, consistent shifts—critical whether you're on the track or the street. This DRAG SPECIALTIES kit delivers OEM-equivalent components engineered to restore full engagement...11321476- SKU:
- 11321476
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- CLUTCH RELEASE KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$55.07 -
DRAG SPECIALTIES Clutch Basket 148141
DRAG SPECIALTIES
$356.11A worn or damaged clutch basket compromises power transfer and leads to slippage, missed shifts, and potential catastrophic drivetrain failure. This OEM-spec replacement from Drag Specialties restores your clutch assembly to factory performance standards...11321379- SKU:
- 11321379
- Availability:
- Ships Same Business Day
- Weight:
- 5.25 LBS
- PRODUCT NAME:
- CLUTCH SHELL
- TYPE:
- CLUTCH
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$356.11Qty in Cart: 0Quantity:Price:$356.11Subtotal: -
DRAG SPECIALTIES Clutch Pushrod End 370186-BC3
DRAG SPECIALTIES
$16.91A reliable clutch pushrod end is critical to maintaining consistent mechanical clutch engagement and preventing premature wear on your clutch assembly. The DRAG SPECIALTIES 370186-BC3 delivers the durability and precision fit you need for dependable...78050015- SKU:
- 78050015
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- TYPE:
- CLUTCH
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- PUSHROD END
$16.91 -
DRAG SPECIALTIES Transmission Cover - Chrome 302092-BC403
DRAG SPECIALTIES
$92.17A polished transmission cover isn't just cosmetic—it protects your transmission case from debris, road salt, and impact while presenting a finished, professional appearance in the engine bay. Chrome finishes resist corrosion and maintain their shine...DS325519- SKU:
- DS325519
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- PRODUCT NAME:
- COVER
- TYPE:
- TRANSMISSION SIDE
- MOUNTING STYLE:
- 6 HOLE
- MATERIAL:
- ZINC
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$92.17 -
DRAG SPECIALTIES Transmission Top Cover I35-0029C/G
DRAG SPECIALTIES
$118.67A transmission top cover is essential for maintaining proper fluid containment and preventing contamination of your transmission's internal components. This DRAG SPECIALTIES cover features die-cast construction for durability and includes a factory-spec...11050250- SKU:
- 11050250
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP
$118.67 -
DRAG SPECIALTIES Transmission Top Cover - Black 35-0027MB
DRAG SPECIALTIES
$79.45A transmission top cover serves as both a functional and aesthetic component that protects your transmission while maintaining a cohesive engine bay appearance. This DRAG SPECIALTIES cover in flat black pairs seamlessly with modern black or chrome engine...11050210- SKU:
- 11050210
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- COLOR/FINISH:
- BLACK
- MOUNTING STYLE:
- 5 HOLE
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- POWDER-COATED
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP
$79.45 -
DRAG SPECIALTIES 5 Stud Pressure Plate 17-0023A
DRAG SPECIALTIES
$14.79If you're running a five-stud clutch setup, your pressure plate is the critical link between engine power and drivetrain control. A worn or inadequate pressure plate compromises clamping force, leading to slippage under acceleration and unpredictable...11312180- SKU:
- 11312180
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- STEEL
- STYLE:
- FIVE-STUD
- TYPE:
- CLUTCH
- UNITS:
- EACH
- PRODUCT NAME:
- PRESSURE PLATE
- RIDING STYLE:
- STREET
$14.79
