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
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ALTO PRODUCTS Steel Plate Set with Anti-Rattler - Big Twin '41-'67 095753AC
ALTO PRODUCTS
$48.95Proper valve train geometry is critical for consistent power delivery and longevity in classic Big Twin engines. The ALTO PRODUCTS Steel Plate Set with Anti-Rattler eliminates unwanted valve train...11310480- SKU:
- 11310480
- Availability:
- Ships Same Business Day
- Weight:
- 2.31 LBS
- MATERIAL:
- STEEL
- TYPE:
- CLUTCH
- PRODUCT NAME:
- PLATE SET
- RIDING STYLE:
- STREET
- UNITS:
- SET OF 3
$48.95Qty in Cart: 0Quantity:Price:$48.95Subtotal: -
ALTO PRODUCTS Steel Plate Set with Anti-Rattler - Big Twin '68-Early '84 095753AD
ALTO PRODUCTS
$63.95Worn or damaged steel plates compromise clutch engagement and create unwanted noise in your Big Twin—exactly what you want to avoid on the street or track. The ALTO PRODUCTS Steel Plate Set...11310481- SKU:
- 11310481
- Availability:
- Ships Same Business Day
- Weight:
- 3.09 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PLATE SET
- TYPE:
- CLUTCH
- UNITS:
- SET OF 4
$63.95Qty in Cart: 0Quantity:Price:$63.95Subtotal: -
ALTO PRODUCTS Steel Plate Set 095753D
ALTO PRODUCTS
$39.95Precision-engineered steel plates are essential for structural reinforcement, chassis bracing, and load distribution in high-performance applications. This ALTO PRODUCTS set delivers the rigidity and...11310484- SKU:
- 11310484
- Availability:
- Ships Same Business Day
- Weight:
- 3.02 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- PLATE SET
- TYPE:
- CLUTCH
- UNITS:
- SET OF 4
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
ALTO PRODUCTS Steel Plate Set 095753M
ALTO PRODUCTS
$56.95Steel plate sets are foundational components for suspension geometry, drivetrain mounting, and structural reinforcement in performance builds. Precision-manufactured plates ensure accurate fitment...11310486- SKU:
- 11310486
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- PLATE SET
- TYPE:
- CLUTCH
- UNITS:
- SET OF 7
$56.95Qty in Cart: 0Quantity:Price:$56.95Subtotal: -
ALTO PRODUCTS Steel Plate Set 095753N
ALTO PRODUCTS
$67.95ALTO Products steel plate sets are engineered for builders and fabricators who demand precision and durability in high-stress applications. Whether you're reinforcing chassis components, constructing...11310487- SKU:
- 11310487
- Availability:
- Ships Same Business Day
- Weight:
- 1.37 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- UNITS:
- SET OF 8
- PRODUCT NAME:
- PLATE SET
- TYPE:
- CLUTCH
$67.95Qty in Cart: 0Quantity:Price:$67.95Subtotal: -
ALTO PRODUCTS Steel Plate - Standard - Big Twin '41-Early '84 095761-290UP1
ALTO PRODUCTS
$10.95A worn or slipping clutch plate directly compromises power transfer and throttle response, turning your Big Twin into a liability on the road or track. ALTO Products' precision-engineered steel plate...11310488- SKU:
- 11310488
- Availability:
- Ships Same Business Day
- Weight:
- 0.73 LBS
- PRODUCT NAME:
- CLUTCH PLATE
- UNITS:
- EACH
- STYLE:
- STANDARD
- DRIVE PLATE MATERIAL:
- STEEL
- RIDING STYLE:
- STREET
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
ALTO PRODUCTS Steel Plate with Anti Rattler 095753K
ALTO PRODUCTS
$18.95A worn or damaged clutch plate directly impacts your transmission's ability to transfer power smoothly and efficiently. The ALTO PRODUCTS Steel Plate with Anti Rattler (095753K) restores OEM-level...11310489- SKU:
- 11310489
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- DRIVE PLATE MATERIAL:
- STEEL
- PRODUCT NAME:
- CLUTCH PLATE
$18.95Qty in Cart: 0Quantity:Price:$18.95Subtotal: -
ALTO PRODUCTS Steel Plate - Small Lug - Big Twin '41-Early '84 095761B290UP1
ALTO PRODUCTS
$11.95A worn or marginal clutch plate compromises both power delivery and reliability—especially critical in a Big Twin engine where precise engagement directly impacts performance and longevity. The ALTO...11310490- SKU:
- 11310490
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- DRIVE PLATE MATERIAL:
- STEEL
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CLUTCH PLATE
- STYLE:
- SMALL LUG
- UNITS:
- EACH
$11.95Qty in Cart: 0Quantity:Price:$11.95Subtotal: -
On Sale
ANDREWS Mainshaft - 2nd Gear 252020
ANDREWS
MSRP: $135.95Now: $122.36Was: $135.95The ANDREWS Mainshaft 2nd Gear delivers the precision engagement your transmission demands during aggressive acceleration and gear changes. Whether you're rebuilding a high-mileage transmission or...DS199431- SKU:
- DS199431
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- STYLE:
- STANDARD RATIO
- TYPE:
- SECOND GEAR
- PRODUCT NAME:
- GEAR
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $135.95Now: $122.36Was: $135.95Qty in Cart: 0Quantity:Price:MSRP: $135.95Now: $122.36Was: $135.95Subtotal: -
On Sale
ANDREWS Countershaft - 3rd Gear 253030
ANDREWS
MSRP: $133.95Now: $120.56Was: $133.95If you're experiencing gear slip, notchy shifts, or worn engagement on third gear, a worn countershaft is often the culprit—and it compromises your entire drivetrain's reliability. The ANDREWS...DS199432- SKU:
- DS199432
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 23
- TYPE:
- THIRD GEAR
- PRODUCT NAME:
- COUNTERSHAFT
- STYLE:
- STANDARD RATIO
- UNITS:
- EACH
MSRP: $133.95Now: $120.56Was: $133.95 -
On Sale
ANDREWS Mainshaft - 3rd Gear 253050
ANDREWS
MSRP: $133.95Now: $120.56Was: $133.95A worn or damaged third gear on your mainshaft will compromise acceleration, shift response, and overall drivetrain reliability. The ANDREWS Mainshaft 3rd Gear 253050 is precision-engineered to...DS199433- SKU:
- DS199433
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GEAR
- TYPE:
- THIRD GEAR
- UNITS:
- EACH
- STYLE:
- STANDARD RATIO
MSRP: $133.95Now: $120.56Was: $133.95 -
On Sale
ANDREWS Mainshaft - 1st Gear 251050
ANDREWS
MSRP: $102.95Now: $92.66Was: $102.95The ANDREWS Mainshaft 1st Gear is engineered for serious transmission builds where reliability and precise gear ratios are non-negotiable. Whether you're rebuilding a high-revving engine or upgrading...DS199434- SKU:
- DS199434
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- TYPE:
- FIRST GEAR
- PRODUCT NAME:
- GEAR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- STYLE:
- STANDARD RATIO
MSRP: $102.95Now: $92.66Was: $102.95 -
On Sale
ANDREWS Countershaft - 1st Gear 251060
ANDREWS
MSRP: $143.95Now: $129.56Was: $143.95A worn or damaged countershaft first gear directly undermines acceleration, shift quality, and powertrain reliability. The ANDREWS 251060 delivers OEM-equivalent precision geometry and material...DS199435- SKU:
- DS199435
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- TYPE:
- FIRST GEAR
- TOOTH COUNT:
- 17
- UNITS:
- EACH
- PRODUCT NAME:
- COUNTERSHAFT
- STYLE:
- STANDARD RATIO
MSRP: $143.95Now: $129.56Was: $143.95Qty in Cart: 0Quantity:Price:MSRP: $143.95Now: $129.56Was: $143.95Subtotal: -
On Sale
ANDREWS Close-Ratio Gear Set 254850
ANDREWS
MSRP: $422.95Now: $380.66Was: $422.95A close-ratio gear set transforms your acceleration by minimizing RPM gaps between gears, keeping your engine in the optimal power band longer. Whether you're on the track or pushing hard on the...DS199436- SKU:
- DS199436
- Availability:
- Ships Same Business Day
- Weight:
- 2.26 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GEAR SET
- RIDING STYLE:
- STREET
- STYLE:
- CLOSE RATIO
- TYPE:
- CLOSE RATIO
MSRP: $422.95Now: $380.66Was: $422.95Qty in Cart: 0Quantity:Price:MSRP: $422.95Now: $380.66Was: $422.95Subtotal: -
On Sale
ANDREWS Stock Ratio Clutch Gear 254710
ANDREWS
MSRP: $302.95Now: $272.66Was: $302.95The ANDREWS Stock Ratio Clutch Gear 254710 delivers reliable engagement and smooth power transfer for riders who demand consistent clutch performance without compromise. Built to OEM specifications,...DS199440- SKU:
- DS199440
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- CLUTCH GEAR
- TYPE:
- STOCK RATIO
- STYLE:
- STANDARD RATIO
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $302.95Now: $272.66Was: $302.95 -
On Sale
ANDREWS Countershaft Gear - 2nd/3rd Gear 296220
ANDREWS
MSRP: $95.95Now: $86.36Was: $95.95The ANDREWS Countershaft Gear 2nd/3rd delivers the precision gear engagement your transmission demands under sustained load and high-RPM shifts. Whether you're running stock or modified power,...DS199450- SKU:
- DS199450
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- GEAR
- TYPE:
- THIRD GEAR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 23
- STYLE:
- STANDARD RATIO
- TYPE:
- SECOND GEAR
MSRP: $95.95Now: $86.36Was: $95.95 -
On Sale
ANDREWS Countershaft Gear - 2nd/3rd Gear 296330
ANDREWS
MSRP: $154.95Now: $139.46Was: $154.95Precision gear selection directly impacts your transmission's efficiency and power delivery across critical mid-range RPM bands. The ANDREWS Countershaft Gear 2nd/3rd upgrade reduces parasitic losses...DS199451- SKU:
- DS199451
- Availability:
- Ships Same Business Day
- Weight:
- 0.82 LBS
- PRODUCT NAME:
- GEAR
- TRANSMISSION TYPE:
- 5 SPEED
- TYPE:
- SECOND GEAR
- TYPE:
- THIRD GEAR
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 27
- UNITS:
- EACH
- STYLE:
- STANDARD RATIO
MSRP: $154.95Now: $139.46Was: $154.95 -
On Sale
ANDREWS Main Drive Gear with Chain Drive 296550
ANDREWS
MSRP: $288.95Now: $260.06Was: $288.95The ANDREWS Main Drive Gear with Chain Drive is engineered for builders and racers who demand reliable, efficient power transfer in high-performance applications. This precision-machined component...DS199452- SKU:
- DS199452
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
- PRODUCT NAME:
- GEAR
- TYPE:
- MAIN DRIVE
- RIDING STYLE:
- STREET
- STYLE:
- CHAIN DRIVE
- STYLE:
- STANDARD RATIO
- TOOTH COUNT:
- 32
- MATERIAL:
- HIGH-NICKEL ALLOY STEEL
- UNITS:
- EACH
MSRP: $288.95Now: $260.06Was: $288.95 -
On Sale
ANDREWS Countershaft Gear - 5th Gear 296555
ANDREWS
MSRP: $58.95Now: $53.06Was: $58.95If you're rebuilding a transmission or upgrading to higher RPM capability, a quality countershaft gear is non-negotiable for reliability and power delivery. The ANDREWS 5th Gear delivers precision...DS199453- SKU:
- DS199453
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- TOOTH COUNT:
- 17
- TYPE:
- FIFTH GEAR
- RIDING STYLE:
- STREET
- STYLE:
- STANDARD RATIO
- PRODUCT NAME:
- GEAR
- UNITS:
- EACH
- TRANSMISSION TYPE:
- 5 SPEED
MSRP: $58.95Now: $53.06Was: $58.95Qty in Cart: 0Quantity:Price:MSRP: $58.95Now: $53.06Was: $58.95Subtotal: -
On Sale
ANDREWS Main Drive Gear with Belt Drive 296585
ANDREWS
MSRP: $288.95Now: $260.06Was: $288.95A reliable main drive gear is fundamental to any high-performance engine's ability to deliver consistent power and longevity. The ANDREWS 296585 is engineered for engines that demand precision timing...DS199454- SKU:
- DS199454
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- MATERIAL:
- HIGH-NICKEL ALLOY STEEL
- STYLE:
- STANDARD RATIO
- TOOTH COUNT:
- 32
- TYPE:
- MAIN DRIVE
- PRODUCT NAME:
- GEAR
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- STYLE:
- BELT DRIVE
MSRP: $288.95Now: $260.06Was: $288.95
