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 Inner Primary Bearing 210202
DRAG SPECIALTIES
$100.65A worn or failing inner primary bearing compromises your drivetrain's efficiency and can lead to costly damage downstream. The DRAG Specialties Inner Primary Bearing 210202 delivers the precision and...11320005- SKU:
- 11320005
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY MAINSHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
$100.65 -
DRAG SPECIALTIES Rear Sprocket - Gloss Black - Flat - 48-Tooth 16421EB
DRAG SPECIALTIES
$87.69If you're converting your cruiser or custom build from belt drive to chain drive, sprocket selection is critical to your overall drivetrain performance and longevity. The DRAG Specialties 48-tooth...12101844- SKU:
- 12101844
- Availability:
- Ships Same Business Day
- Weight:
- 4.80 LBS
- CHAIN SIZE:
- 530
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 2.220'
- TYPE:
- CONVERSION
- UNITS:
- EACH
- MATERIAL:
- STEEL
- OFFSET IMPERIAL:
- CENTERED
- PRODUCT NAME:
- SPROCKET
- STYLE:
- FLAT
- TOOTH COUNT:
- 48
- TYPE:
- DRIVE
$87.69Qty in Cart: 0Quantity:Price:$87.69Subtotal: -
DRAG SPECIALTIES Rear Drive Belt - 140-Tooth - 24mm BDL SPC-140-1
DRAG SPECIALTIES
$258.48If you're pushing your bike to the limit, a failing drive belt will kill your performance and leave you stranded. The DRAG SPECIALTIES 140-Tooth Rear Drive Belt delivers the tensile strength and...12040113- SKU:
- 12040113
- Availability:
- Ships Same Business Day
- Weight:
- 1.93 LBS
- MATERIAL:
- CARBON FIBER
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 140
- TYPE:
- REAR DRIVE
- PRODUCT NAME:
- BELT
- UNITS:
- EACH
$258.48 -
On Sale
S&S CYCLE Final Drive Belt - 127-Tooth - 1 1/2" 106-0349
S&S CYCLE
MSRP: $292.95Now: $263.66Was: $292.95A final drive belt is the critical link between your transmission and rear wheel—any slippage or wear directly impacts acceleration, reliability, and power transfer. The S&S Cycle 127-tooth belt uses...12040094- SKU:
- 12040094
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
- PRODUCT NAME:
- BELT
- TOOTH COUNT:
- 127
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- X3N CARBON
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- REAR DRIVE
MSRP: $292.95Now: $263.66Was: $292.95Qty in Cart: 0Quantity:Price:MSRP: $292.95Now: $263.66Was: $292.95Subtotal: -
On Sale
S&S CYCLE Final Drive Belt - 125-Tooth - 1 1/8" 106-0357
S&S CYCLE
MSRP: $278.95Now: $251.06Was: $278.95A reliable final drive belt is critical to maintaining consistent power delivery and preventing catastrophic drivetrain failure. The S&S Cycle 125-tooth belt uses Gates Carbon X3N material—engineered...12040102- SKU:
- 12040102
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 1-1/8'
- MATERIAL:
- X3N CARBON
- PRODUCT NAME:
- BELT
- UNITS:
- EACH
- TOOTH COUNT:
- 125
- TYPE:
- REAR DRIVE
MSRP: $278.95Now: $251.06Was: $278.95 -
DRAG SPECIALTIES Rear Pulley Spacer - .940" 193086
DRAG SPECIALTIES
$54.52When you're running a wide rear tire setup, proper wheel spacing is critical—incorrect offset can cause rubbing, uneven wear, and compromised handling. The DRAG SPECIALTIES Rear Pulley Spacer...12010102- SKU:
- 12010102
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PULLEY
- UNITS:
- EACH
- WIDTH IMPERIAL:
- 0,940'
- MATERIAL:
- BILLET ALUMINUM
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPACER
$54.52 -
DRAG SPECIALTIES Rear Pulley Spacer - 1.00" 193088
DRAG SPECIALTIES
$54.52When upgrading to a wider rear tire, wheel offset becomes critical to maintaining proper suspension geometry and brake clearance. The DRAG SPECIALTIES Rear Pulley Spacer provides the precise 1.00"...12010103- SKU:
- 12010103
- Availability:
- Ships Same Business Day
- Weight:
- 1.09 LBS
- PRODUCT NAME:
- SPACER
- TYPE:
- PULLEY
- UNITS:
- EACH
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- WIDTH IMPERIAL:
- 1.000'
$54.52 -
DRAG SPECIALTIES Rear Pulley Spacer - 1.375" 193090
DRAG SPECIALTIES
$59.87When you're running a wide rear tire setup, proper wheel spacing is non-negotiable for clearance and handling dynamics. This billet aluminum spacer maintains precise axle geometry while accommodating...12010105- SKU:
- 12010105
- Availability:
- Ships Same Business Day
- Weight:
- 1.56 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PULLEY
- WIDTH IMPERIAL:
- 1,375'
- COLOR/FINISH:
- RAW
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SPACER
- MATERIAL:
- BILLET ALUMINUM
- UNITS:
- EACH
$59.87 -
DRAG SPECIALTIES Rear Pulley Insert - XL '91-'03 302219
DRAG SPECIALTIES
$66.29A worn or damaged rear pulley insert compromises belt tension consistency and can lead to premature belt wear or slippage—especially critical for high-performance engines where precision timing...12010519- SKU:
- 12010519
- Availability:
- Ships Same Business Day
- Weight:
- 1.89 LBS
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MODEL:
- PRECISION-FORMED
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- TYPE:
- PULLEY
$66.29 -
DRAG SPECIALTIES Chrome Derby Cover 33-0016K-BC427
DRAG SPECIALTIES
$42.95A derby cover serves as both functional protection and visual statement on your Harley. This Drag Specialties chrome piece shields your primary cover from road debris and weather while delivering the...DS375647- SKU:
- DS375647
- Availability:
- Ships Same Business Day
- Weight:
- 1.13 LBS
- PRODUCT NAME:
- DERBY COVER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MOUNTING STYLE:
- 4 HOLE
- COLOR/FINISH:
- CHROME
- MATERIAL:
- DIE-CAST
- RIDING STYLE:
- STREET
$42.95Qty in Cart: 0Quantity:Price:$42.95Subtotal: -
DRAG SPECIALTIES Primary Chain Adjusting Shoe 15-0904-SC1
DRAG SPECIALTIES
$10.55Chain adjustment on cruisers and touring bikes demands a component that won't wear prematurely under load. The DRAG Specialties Primary Chain Adjusting Shoe replaces the stock nylon design with a...DS192001- SKU:
- DS192001
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- PRIMARY CHAIN
- UNITS:
- EACH
- PRODUCT NAME:
- ADJUSTING SHOE
- RIDING STYLE:
- STREET
$10.55 -
DRAG SPECIALTIES Lower Belt Guard - 07-17 FXST/FLST/FLSTF - Chrome G32-0323
DRAG SPECIALTIES
$150.82The Drag Specialties Lower Belt Guard protects your primary drivetrain from road debris, moisture, and environmental contamination that can compromise belt longevity and performance. This...12020069- SKU:
- 12020069
- Availability:
- Ships Same Business Day
- Weight:
- 1.14 LBS
- MOUNTING POSITION:
- LOWER
- RIDING STYLE:
- STREET
- TYPE:
- REAR BELT
- COLOR/FINISH:
- CHROME
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GUARD
- UNITS:
- EACH
$150.82 -
DRAG SPECIALTIES Compensating Sprocket Kit 241272-LBX1
DRAG SPECIALTIES
$308.41Harley-Davidson's compensating sprocket system manages engine torque delivery across the entire RPM band, preventing drivetrain shock and extending clutch life. This complete kit replaces worn...DS195198- SKU:
- DS195198
- Availability:
- Ships Same Business Day
- Weight:
- 6.08 LBS
- TOOTH COUNT:
- 24
- PRODUCT NAME:
- SPROCKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- COMPENSATING
- UNITS:
- KIT
$308.41 -
DRAG SPECIALTIES Rear Drive Belt - 136-Tooth - 1 1/2" BDL SPC-136
DRAG SPECIALTIES
$337.57A reliable rear drive belt is non-negotiable for consistent power delivery and engine protection. The DRAG SPECIALTIES 136-Tooth belt combines carbon fiber reinforcement with Goodyear engineering to...12040058- SKU:
- 12040058
- Availability:
- Ships Same Business Day
- Weight:
- 2.39 LBS
- MATERIAL:
- CARBON FIBER
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 136
- UNITS:
- EACH
- PRODUCT NAME:
- BELT
- TYPE:
- REAR DRIVE
- WIDTH IMPERIAL:
- 1-1/2'
$337.57 -
DRAG SPECIALTIES Rear Pulley Spacer - .125" 26-0128-S32
DRAG SPECIALTIES
$19.21When you upgrade to a wider rear tire, your sprocket or belt pulley alignment becomes critical—and that's where this spacer shim steps in. The DRAG SPECIALTIES Rear Pulley Spacer provides the precise...12010232- SKU:
- 12010232
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- SPROCKET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPACER
- COLOR/FINISH:
- ZINC
- TYPE:
- PULLEY
- WIDTH IMPERIAL:
- 0.125'
- RIDING STYLE:
- STREET
$19.21 -
DRAG SPECIALTIES Rear Pulley Insert - ST '00-'05 302218
DRAG SPECIALTIES
$109.09Worn or damaged rear pulley inserts compromise belt alignment and accelerate drive system wear—leading to costly downtime and potential catastrophic failure. The DRAG SPECIALTIES Rear Pulley Insert...12010518- SKU:
- 12010518
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 70
- TYPE:
- PULLEY
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- MOUNTING POSITION:
- REAR
- MODEL:
- PRECISION-FORMED
$109.09 -
DRAG SPECIALTIES Cush Drive Isolator Pulley W15-0562
DRAG SPECIALTIES
$39.54Cush drive isolator pulleys absorb drivetrain harmonics and vibration that can lead to premature wear on belts, bearings, and engine mounts. If you're running a high-revving or forced induction...12010844- SKU:
- 12010844
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CUSH DRIVE
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- ISOLATOR
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
$39.54 -
DRAG SPECIALTIES Lower Belt Guard - 99-08 FLHT/FLHX/FLHR/FLTR - Chrome G32-0327
DRAG SPECIALTIES
$91.97The Drag Specialties Lower Belt Guard provides essential protection for your primary drivetrain while maintaining the clean aesthetic of your touring cruiser. Chrome-finished construction resists...12020089- SKU:
- 12020089
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- GUARD
- UNITS:
- EACH
- TYPE:
- REAR BELT
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- LOWER
$91.97 -
DRAG SPECIALTIES Rear Drive Belt - 132-Tooth - 1 1/8" BDL SPC-132-118
DRAG SPECIALTIES
$311.15A reliable rear drive belt is critical to maintaining consistent power delivery and avoiding catastrophic drivetrain failure on the track or street. The DRAG SPECIALTIES 132-tooth belt delivers 33%...12040047- SKU:
- 12040047
- Availability:
- Ships Same Business Day
- Weight:
- 2.01 LBS
- RIDING STYLE:
- STREET
- WIDTH IMPERIAL:
- 1-1/8'
- PRODUCT NAME:
- BELT
- MATERIAL:
- CARBON FIBER
- TOOTH COUNT:
- 132
- UNITS:
- EACH
- TYPE:
- REAR DRIVE
$311.15 -
DRAG SPECIALTIES Primary Shoe Adjuster 210029
DRAG SPECIALTIES
$51.89Proper brake shoe adjustment is critical to maintaining consistent stopping power and preventing premature wear on your braking system. This OEM-replacement adjuster ensures your primary shoes seat...78050022- SKU:
- 78050022
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- CHAIN ADJUSTER KIT
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ZINC
- TYPE:
- PRIMARY CHAIN
$51.89
