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
-
On Sale
BARNETT Lock-Up Pressure Plate - Hydraulic 618-30-33017
BARNETT
MSRP: $436.67Now: $393.00Was: $436.67A lock-up pressure plate is essential if you're running a high-performance clutch or building a custom drivetrain—it eliminates slip under load and delivers the crisp engagement that separates a built bike from a stock one. The BARNETT hydraulic model...11313901- SKU:
- 11313901
- Availability:
- Ships Same Business Day
- Weight:
- 2.16 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- PRESSURE PLATE
- STYLE:
- LOCK-UP
- UNITS:
- EACH
MSRP: $436.67Now: $393.00Was: $436.67 -
On Sale
BARNETT Lock-Up Pressure Plate - Mechanical 618-30-23017
BARNETT
MSRP: $436.67Now: $393.00Was: $436.67If you're running a high-RPM engine and need reliable clutch engagement without slip, a quality pressure plate is non-negotiable. The BARNETT Lock-Up Mechanical Pressure Plate delivers progressive clamping force that scales with engine speed, ensuring...11313902- SKU:
- 11313902
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PRESSURE PLATE
- STYLE:
- LOCK-UP
- UNITS:
- EACH
MSRP: $436.67Now: $393.00Was: $436.67 -
On Sale
BARNETT Scorpion Clutch Plate Kit - Hydraulic 306-32-10103
BARNETT
MSRP: $320.46Now: $288.41Was: $320.46The BARNETT Scorpion Clutch Plate Kit is the ideal replacement solution for maintaining peak engagement and holding power in hydraulic Scorpion clutch systems. Whether you're running a high-horsepower street machine or a track-focused build, worn clutch...11313903- SKU:
- 11313903
- Availability:
- Ships Same Business Day
- Weight:
- 3.43 LBS
- MODEL:
- SCORPION
- PRODUCT NAME:
- CLUTCH PLATE KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- STYLE:
- HYDRAULIC CLUTCH
MSRP: $320.46Now: $288.41Was: $320.46 -
BAKER DRIVETRAIN Direct Drive Gear Set - 6-Speed - Black DD6-411L-03
BAKER DRIVETRAIN
$3,195.00If you're running a 5-speed case and want to lower cruising RPMs without a complete transmission overhaul, the BAKER DRIVETRAIN 6-Speed Direct Drive Gear Set delivers real gains in efficiency and engine longevity. The addition of a true 6th gear (.86:1...11030053- SKU:
- 11030053
- Availability:
- Ships Same Business Day
- Weight:
- 30.00 LBS
- FIRST GEAR RATIO:
- 3.24:1
- PRODUCT NAME:
- GEAR SET
- RIDING STYLE:
- STREET
- STYLE:
- DIRECT DRIVE
- SIXTH GEAR RATIO:
- 0.86:1
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- MODEL:
- DD6
- TRANSMISSION TYPE:
- 6 SPEED
$3,195.00 -
BAKER DRIVETRAIN Direct Drive Gear Set - 6-Speed - Black DD6-411PL-03
BAKER DRIVETRAIN
$3,195.00If you're running a 5-speed case but want the fuel economy and reduced engine wear of a 6-speed transmission, the BAKER DRIVETRAIN Direct Drive Gear Set is a straightforward bolt-in solution that requires no case modifications. This is real-world...11030055- SKU:
- 11030055
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MODEL:
- DD6
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GEAR SET
- STYLE:
- DIRECT DRIVE
- UNITS:
- KIT
- FIRST GEAR RATIO:
- 3.24:1
- TRANSMISSION TYPE:
- 6 SPEED
- TYPE:
- TRANSMISSION
- SIXTH GEAR RATIO:
- 0.86:1
$3,195.00 -
BAKER DRIVETRAIN Direct Drive Gear Set - 6-Speed - Black DD6-411S-03
BAKER DRIVETRAIN
$3,195.00If you're running a 5-speed case and looking to drop RPM on the highway without sacrificing low-end punch, the Baker DD6 Direct Drive Gear Set transforms your cruising experience while maintaining aggressive acceleration when you need it. This 6-speed...11030056- SKU:
- 11030056
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MODEL:
- DD6
- RIDING STYLE:
- STREET
- SIXTH GEAR RATIO:
- 0.86:1
- TYPE:
- TRANSMISSION
- FIRST GEAR RATIO:
- 3.24:1
- TRANSMISSION TYPE:
- 6 SPEED
- PRODUCT NAME:
- GEAR SET
- STYLE:
- DIRECT DRIVE
- UNITS:
- KIT
$3,195.00 -
BAKER DRIVETRAIN 6-Speed Gear Set - Black OD6-401-03
BAKER DRIVETRAIN
$3,195.00A 6-speed overdrive transforms highway driving by dropping engine RPM at cruise, reducing fuel consumption and mechanical wear while maintaining responsive acceleration when you need it. The roller detent shift drum and precision-ground 8620 steel gears...11030057- SKU:
- 11030057
- Availability:
- Ships Same Business Day
- Weight:
- 29.00 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- FIRST GEAR RATIO:
- 2.94:1
- MODEL:
- OD6
- PRODUCT NAME:
- GEAR SET
- TRANSMISSION TYPE:
- 6 SPEED
- SIXTH GEAR RATIO:
- 0.86:1
- STYLE:
- OVERDRIVE
- TYPE:
- TRANSMISSION
$3,195.00 -
BAKER DRIVETRAIN 6-Speed Gear Set - Black OD6-401P-03
BAKER DRIVETRAIN
$3,195.00If you're running a 5-speed transmission and want measurably better shifting response, lower cruising RPMs, and the reliability of precision-engineered gears, this 6-speed conversion kit delivers all three. The roller detent shift drum and optimized gear...11030058- SKU:
- 11030058
- Availability:
- Ships Same Business Day
- Weight:
- 30.00 LBS
- RIDING STYLE:
- STREET
- SIXTH GEAR RATIO:
- 0.86:1
- STYLE:
- OVERDRIVE
- TYPE:
- TRANSMISSION
- FIRST GEAR RATIO:
- 2.94:1
- MODEL:
- OD6
- PRODUCT NAME:
- GEAR SET
- TRANSMISSION TYPE:
- 6 SPEED
- UNITS:
- KIT
$3,195.00 -
BAKER DRIVETRAIN 6-Speed Gear Set - Black OD6-401S-03
BAKER DRIVETRAIN
$3,195.00If you're pushing your transmission to its limits, a poorly-shifting gearset will cost you time on the track and comfort on the street. The Baker Drivetrain 6-Speed addresses both with precision-ground 8620 steel gears and a roller detent drum that...11030059- SKU:
- 11030059
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- STREET
- SIXTH GEAR RATIO:
- 0.86:1
- STYLE:
- OVERDRIVE
- UNITS:
- KIT
- TRANSMISSION TYPE:
- 6 SPEED
- FIRST GEAR RATIO:
- 2.94:1
- MODEL:
- OD6
- PRODUCT NAME:
- GEAR SET
- TYPE:
- TRANSMISSION
$3,195.00 -
BAKER DRIVETRAIN 6-Speed Gear Set - Black OD6-404P2-03
BAKER DRIVETRAIN
$3,195.00A 6-speed transmission delivers measurable gains where it counts: lower engine RPMs at highway speeds reduce fuel consumption and mechanical wear, while the optimized gear ratios—2.94 first and 0.86 sixth—give you both aggressive acceleration and relaxed...11030060- SKU:
- 11030060
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- FIRST GEAR RATIO:
- 2.94:1
- MODEL:
- OD6
- PRODUCT NAME:
- GEAR SET
- TRANSMISSION TYPE:
- 6 SPEED
- SIXTH GEAR RATIO:
- 0.86:1
- STYLE:
- OVERDRIVE
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$3,195.00 -
BAKER DRIVETRAIN 6-Speed Gear Set - Polished OD6-404SP-02
BAKER DRIVETRAIN
$3,195.00If you're running a 5-speed transmission and tired of notchy shifts or highway RPMs that kill fuel economy, the Baker Drivetrain 6-Speed Gear Set delivers the smoothness and efficiency of modern gearbox technology without replacing your transmission case...11030061- SKU:
- 11030061
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- FIRST GEAR RATIO:
- 2.94:1
- MODEL:
- OD6
- PRODUCT NAME:
- GEAR SET
- TRANSMISSION TYPE:
- 6 SPEED
- TYPE:
- TRANSMISSION
- RIDING STYLE:
- STREET
- SIXTH GEAR RATIO:
- 0.86:1
- STYLE:
- OVERDRIVE
- UNITS:
- KIT
$3,195.00 -
BAKER DRIVETRAIN 6-Speed Gear Set - Black OD6-404SP-03
BAKER DRIVETRAIN
$3,195.00Stock 5-speed transmissions leave performance on the table—higher RPMs at highway speeds, notchy shifts, and limited gear optimization. The Baker Drivetrain 6-Speed Gear Set transforms your transmission with precision-engineered ratios, roller detent...11030062- SKU:
- 11030062
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- FIRST GEAR RATIO:
- 2.94:1
- MODEL:
- OD6
- PRODUCT NAME:
- GEAR SET
- TRANSMISSION TYPE:
- 6 SPEED
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- STYLE:
- OVERDRIVE
- SIXTH GEAR RATIO:
- 0.86:1
- TYPE:
- TRANSMISSION
$3,195.00 -
BAKER DRIVETRAIN Direct Drive Gear Set - 6-Speed - Black DD6-411-03
BAKER DRIVETRAIN
$3,195.00If you're running a 5-speed Baker case and want to unlock real-world fuel economy and lower cruising RPMs without sacrificing acceleration, this 6-speed direct drive gear set delivers exactly that. The helical-cut 4th, 5th, and 6th gears run...11030052- SKU:
- 11030052
- Availability:
- Ships Same Business Day
- Weight:
- 31.06 LBS
- PRODUCT NAME:
- GEAR SET
- MODEL:
- DD6
- TRANSMISSION TYPE:
- 6 SPEED
- SIXTH GEAR RATIO:
- 0.86:1
- STYLE:
- DIRECT DRIVE
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- FIRST GEAR RATIO:
- 3.24:1
- RIDING STYLE:
- STREET
$3,195.00 -
On Sale
BAKER DRIVETRAIN Direct Drive Gear Set - 6-Speed - Black DD6-411P-03
BAKER DRIVETRAIN
MSRP: $3,195.00Now: $2,999.00Was: $3,195.00If you're running a 5-speed case and want to maximize fuel efficiency without sacrificing performance, this 6-speed direct drive gear set delivers lower cruising RPMs and extended engine life. The precision-ground 8620 steel construction ensures smooth,...11030054- SKU:
- 11030054
- Availability:
- Ships Same Business Day
- Weight:
- 31.26 LBS
- MODEL:
- DD6
- SIXTH GEAR RATIO:
- 0.86:1
- TRANSMISSION TYPE:
- 6 SPEED
- FIRST GEAR RATIO:
- 3.24:1
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- PRODUCT NAME:
- GEAR SET
- RIDING STYLE:
- STREET
- STYLE:
- DIRECT DRIVE
MSRP: $3,195.00Now: $2,999.00Was: $3,195.00 -
PAUGHCO Transmission Plate - OE Type 4-Speed 218
PAUGHCO
$151.95If you're running a four-speed Big Twin—whether it's a stock Knucklehead or a modern custom build—this transmission plate is engineered to handle the demands of real-world riding and racing. PAUGHCO's OE Type 4-Speed 218 delivers the durability and...11050011- SKU:
- 11050011
- Availability:
- Ships Same Business Day
- Weight:
- 3.74 LBS
- MATERIAL:
- STEEL
- TYPE:
- TRANSMISSION
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TRANSMISSION TYPE:
- 4-SPEED
- UNITS:
- EACH
- PRODUCT NAME:
- MOUNTING PLATE
$151.95Qty in Cart: 0Quantity:Price:$151.95Subtotal: -
PAUGHCO Plate - 5/4 Speed Conversion 218-1
PAUGHCO
$151.95If you're running a Big Twin with a four-speed transmission and need a reliable, purpose-built conversion solution, the PAUGHCO Plate 218-1 eliminates the guesswork of custom fabrication. This heavy-duty plate integrates seamlessly into Paughco Easyride...11050012- SKU:
- 11050012
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- PRODUCT NAME:
- MOUNTING PLATE
- TYPE:
- TRANSMISSION
- MATERIAL:
- STEEL
- RIDING STYLE:
- STREET
$151.95Qty in Cart: 0Quantity:Price:$151.95Subtotal: -
PAUGHCO Transmission Mounting Plate 218-A
PAUGHCO
$112.95If you're running a Softail 5-speed transmission in a rigid Paughco frame, this mounting plate is the critical interface that ensures proper transmission alignment and stability under load. A precision-engineered solution eliminates guesswork and...11050013- SKU:
- 11050013
- Availability:
- Ships Same Business Day
- Weight:
- 1.56 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- MOUNTING PLATE
- TRANSMISSION TYPE:
- 5-SPEED
- TYPE:
- TRANSMISSION
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
$112.95 -
PBI Offset Transmission Sprocket - 22-Tooth 281-22
PBI
$125.15Precise sprocket alignment is critical to chain longevity and drivetrain efficiency—even slight misalignment accelerates wear and power loss. The PBI 22-Tooth Offset Transmission Sprocket delivers the exact geometric correction needed to optimize your...PBI28122- SKU:
- PBI28122
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- COLOR/FINISH:
- NICKEL
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 22
- CHAIN SIZE:
- 530
- OFFSET IMPERIAL:
- 0.750'
- TYPE:
- MAINSHAFT
- MATERIAL:
- STEEL
- UNITS:
- EACH
$125.15 -
PBI Offset Transmission Sprocket - 23-Tooth 281-23
PBI
$130.90Precision sprocket alignment is critical to chain longevity and power delivery in high-performance applications. The PBI 23-Tooth Offset Transmission Sprocket gives you the exact geometry needed to optimize drivetrain geometry without compromise. Built...PBI28123- SKU:
- PBI28123
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- TOOTH COUNT:
- 23
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- CHAIN SIZE:
- 530
- OFFSET IMPERIAL:
- 0.750'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- NICKEL
- PRODUCT NAME:
- SPROCKET
$130.90 -
PBI Offset Transmission Sprocket - 24-Tooth 281-24
PBI
$142.05Precise sprocket alignment is critical for chain longevity, power delivery, and driveline efficiency in high-performance applications. The PBI Offset Transmission Sprocket compensates for late-model mainshaft geometry, eliminating the chain runout and...PBI28124- SKU:
- PBI28124
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- CHAIN SIZE:
- 530
- OFFSET IMPERIAL:
- 0.750'
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 24
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- COLOR/FINISH:
- NICKEL
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
$142.05
