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
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On Sale
BAKER DRIVETRAIN Transmission Cover - Black DD7-10603-A
BAKER DRIVETRAIN
MSRP: $479.00Now: $455.05Was: $479.00A quality transmission cover protects your drivetrain from contamination and heat while maintaining clean lines under the car. This BAKER DRIVETRAIN unit delivers that protection without sacrificing...11070721- SKU:
- 11070721
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
MSRP: $479.00Now: $455.05Was: $479.00 -
On Sale
BAKER DRIVETRAIN Primary Rebuild Kit - '07-'17 Softail, '06-'17 Dyna PRK-FXST-2
BAKER DRIVETRAIN
MSRP: $149.00Now: $141.55Was: $149.00When you pull your primary case, you need a complete seal solution—not a guessing game about which gaskets and O-rings will hold pressure and keep oil where it belongs. The BAKER DRIVETRAIN Primary...11200439- SKU:
- 11200439
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
MSRP: $149.00Now: $141.55Was: $149.00 -
On Sale
BAKER DRIVETRAIN Transmission Rebuild Kit - '07-'23 Softail/Touring, '06-'17 Dyna with Cruise Drive TRK-CD6
BAKER DRIVETRAIN
MSRP: $599.00Now: $569.05Was: $599.00A worn transmission isn't just noisy—it's a liability on the road and the track. The BAKER DRIVETRAIN Transmission Rebuild Kit gives you everything needed for a complete, factory-quality rebuild,...11040033- SKU:
- 11040033
- Availability:
- Ships Same Business Day
- Weight:
- 3.89 LBS
MSRP: $599.00Now: $569.05Was: $599.00 -
On Sale
BAKER DRIVETRAIN Transmission Rebuild Kit - OD6R TRK-OD6R
BAKER DRIVETRAIN
MSRP: $429.00Now: $407.55Was: $429.00A worn BAKER transmission accumulates bearing wear, gear noise, and fluid leakage that compromise shift quality and reliability. This comprehensive rebuild kit eliminates the need to source...11040025- SKU:
- 11040025
- Availability:
- Ships Same Business Day
- Weight:
- 4.45 LBS
MSRP: $429.00Now: $407.55Was: $429.00 -
On Sale
BAKER DRIVETRAIN Transmission Rebuild Kit - DD6 TRK-DD6
BAKER DRIVETRAIN
MSRP: $429.00Now: $407.55Was: $429.00A worn BAKER transmission doesn't just lose performance—it accumulates noise, vibration, and accelerating wear that compromises your entire drivetrain. This complete rebuild kit eliminates the...11040027- SKU:
- 11040027
- Availability:
- Ships Same Business Day
- Weight:
- 4.03 LBS
MSRP: $429.00Now: $407.55Was: $429.00Qty in Cart: 0Quantity:Price:MSRP: $429.00Now: $407.55Was: $429.00Subtotal: -
On Sale
BAKER DRIVETRAIN Transmission Rebuild Kit TRK-FLSTX-E
BAKER DRIVETRAIN
MSRP: $429.00Now: $407.55Was: $429.00A worn transmission compromises both performance and reliability—noise, slippage, and rough shifts are signs that internal components need replacement. The BAKER DRIVETRAIN TRK-FLSTX-E Transmission...11040029- SKU:
- 11040029
- Availability:
- Ships Same Business Day
- Weight:
- 4.71 LBS
MSRP: $429.00Now: $407.55Was: $429.00 -
On Sale
BAKER DRIVETRAIN Primary Rebuild Kit - '94-'06 Softail, '94-'05 Dyna PRK-FXST
BAKER DRIVETRAIN
MSRP: $149.00Now: $141.55Was: $149.00When you're inside your primary case, you need seals and gaskets that won't let you down—and you don't want to waste time sourcing individual components from multiple suppliers. The BAKER DRIVETRAIN...11200440- SKU:
- 11200440
- Availability:
- Ships Same Business Day
- Weight:
- 1.48 LBS
MSRP: $149.00Now: $141.55Was: $149.00 -
On Sale
BAKER DRIVETRAIN Cruise Drive Main Drive Gear Tapered Roller Bearing Kit 640-67
BAKER DRIVETRAIN
MSRP: $995.00Now: $945.25Was: $995.00Stock Harley-Davidson main drive gear bearings are a known weak point—premature failure can leave you stranded and facing expensive engine teardowns. The Baker Drivetrain 640-67 kit addresses this...11100100- SKU:
- 11100100
- Availability:
- Ships Same Business Day
- Weight:
- 6.27 LBS
MSRP: $995.00Now: $945.25Was: $995.00 -
On Sale
BAKER DRIVETRAIN Primary Rebuild Kit - '07-'16 Touring PRK-FL-2
BAKER DRIVETRAIN
MSRP: $149.00Now: $141.55Was: $149.00When you crack open your primary case for inspection or maintenance, you need a complete gasket and seal kit that won't force you to source parts from multiple suppliers. The BAKER DRIVETRAIN Primary...11200438- SKU:
- 11200438
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
MSRP: $149.00Now: $141.55Was: $149.00 -
On Sale
BAKER DRIVETRAIN Primary Rebuild Kit - '94-'06 Touring PRK-FL
BAKER DRIVETRAIN
MSRP: $149.00Now: $141.55Was: $149.00When you crack open your primary case for service, inspection, or rebuild work, you need a complete gasket and seal solution—not a scattered collection of individual parts. The BAKER DRIVETRAIN...11200441- SKU:
- 11200441
- Availability:
- Ships Same Business Day
- Weight:
- 1.48 LBS
MSRP: $149.00Now: $141.55Was: $149.00 -
On Sale
BAKER DRIVETRAIN Primary Rebuild Kit - M8 Softail PRK-ST-M8
BAKER DRIVETRAIN
MSRP: $149.00Now: $141.55Was: $149.00When you crack open your M8 Softail primary case, you need gaskets and seals that won't leave you chasing oil leaks for the next thousand miles. This comprehensive Baker rebuild kit eliminates...11200442- SKU:
- 11200442
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
MSRP: $149.00Now: $141.55Was: $149.00 -
On Sale
BAKER DRIVETRAIN Primary Rebuild Kit - M8 Touring PRK-FL-M8
BAKER DRIVETRAIN
MSRP: $149.00Now: $141.55Was: $149.00When you pull your M8 Touring primary case, using OEM gaskets and seals is a gamble—dried-out or compromised seals lead to leaks, contamination, and costly damage. The BAKER DRIVETRAIN Primary...11200443- SKU:
- 11200443
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
MSRP: $149.00Now: $141.55Was: $149.00Qty in Cart: 0Quantity:Price:MSRP: $149.00Now: $141.55Was: $149.00Subtotal: -
DRAG SPECIALTIES Clutch Hub - M8 Softail 148425
DRAG SPECIALTIES
$182.27OEM clutch hubs on M8 Softails experience wear and slippage under aggressive riding conditions. The DRAG SPECIALTIES Clutch Hub addresses this with a reinforced inner hub insert designed to handle...11321829- SKU:
- 11321829
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$182.27 -
DRAG SPECIALTIES Clutch Basket - M8 148407
DRAG SPECIALTIES
$441.97A worn or damaged clutch basket compromises your entire drivetrain's reliability—especially critical in high-RPM applications where precision matters. This DRAG SPECIALTIES M8 replacement offers an...11321828- SKU:
- 11321828
- Availability:
- Ships Same Business Day
- Weight:
- 9.51 LBS
$441.97 -
On Sale
BAKER DRIVETRAIN 5-Speed N1 Shift Drum Kit N170-5-A
BAKER DRIVETRAIN
MSRP: $374.00Now: $355.30Was: $374.00If you're running aggressive 1-2 upshifts or relying on jockey shift techniques, false neutrals can cost you lap time and consistency. The Baker N1 shift drum eliminates that risk by positioning...11100101- SKU:
- 11100101
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
MSRP: $374.00Now: $355.30Was: $374.00 -
DRAG SPECIALTIES Primary Tensioner Kit - '91-'03 XL G15-0945
DRAG SPECIALTIES
$52.95A worn or outdated primary tensioner system compromises both reliability and performance on your Harley-Davidson XL. This auto-adjust kit eliminates manual tension adjustments and the guesswork that...11200446- SKU:
- 11200446
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$52.95 -
DRAG SPECIALTIES Primary Tensioner Kit - '01-'06 Twin Cam/'01-'05 Dyna G15-0946
DRAG SPECIALTIES
$81.57A properly functioning primary tensioner is essential for maintaining consistent chain tension and preventing premature wear on your Twin Cam or Dyna drivetrain. This DRAG Specialties auto-adjust kit...11200447- SKU:
- 11200447
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
$81.57Qty in Cart: 0Quantity:Price:$81.57Subtotal: -
DRAG SPECIALTIES Primary Tensioner Kit - Big Twin G15-0947
DRAG SPECIALTIES
$117.61A worn or outdated primary tensioner system compromises chain security and engine reliability—two non-negotiables in high-performance riding. The DRAG Specialties Primary Tensioner Kit upgrades your...11200448- SKU:
- 11200448
- Availability:
- Ships Same Business Day
- Weight:
- 1.74 LBS
$117.61 -
DRAG SPECIALTIES Transmission Pulley - 32 Tooth - Big Twin D26-0159-32
DRAG SPECIALTIES
$247.17A worn or damaged transmission pulley compromises power transfer efficiency and can lead to belt slippage or premature wear on your drivetrain. This direct OEM replacement restores...12030021- SKU:
- 12030021
- Availability:
- Ships Same Business Day
- Weight:
- 11.02 LBS
$247.17 -
DRAG SPECIALTIES Transmission Pulley - 32 Tooth - Big Twin D26-0157-32
DRAG SPECIALTIES
$201.11If your Big Twin transmission pulley shows signs of wear or slippage, you're losing power transfer efficiency and risking catastrophic drivetrain failure. This OEM-spec replacement restores factory...12030022- SKU:
- 12030022
- Availability:
- Ships Same Business Day
- Weight:
- 4.54 LBS
$201.11
