Harley Engine
Harley Bike Engine Parts at JJ Motorsports
Rebuild and boost your Harley's engine with premium parts from JJ Motorsports. Our inventory features complete gasket sets, piston kits, oil filters, pushrod tubes, and coolers designed for maximum strength, leak-free sealing, and high-performance in extreme conditions. Compatible with Big Twins, Softail, Touring, and more, these components support top-end overhauls, oil management, and durability for street rides or custom builds.
Shop trusted brands like Drag Specialties for magnetic filters and Wiseco for forged pistons. Explore related categories such as Harley air and fuel for carb tuning or Harley drivetrain for transmission upgrades.
Top Harley Engine Products
- DRAG SPECIALTIES Magnetic Ring Oil Filter - Chrome - 3-1/4" 140003HP-BX18 – Captures metal particles with pressure relief.
- WISECO Piston Kit .010 .883 XL K1656 – Forged aluminum with rings, pins, and circlips for rebuilds.
- DRAG SPECIALTIES Pushrod Tube Kit Big Twin 75711 – Includes tubes, clips, cups, and springs for complete engine.
- ULTRACOOL Below Regulator Mount Oil Cooler Stainless Steel RF-2CSS – Fits S&S 111/124/143 engines with machined adapter.
- PAUGHCO Ribbed Teardrop Air Cleaner 701-200 – Chrome-plated aluminum with mini filter.
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
-
JAMES GASKET Trans Gasket SEL Kit - Dyna 33031-91
JAMES GASKET
$51.95Made in the U.S.A.DS173371- SKU:
- DS173371
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- 5-SPEED
- UNITS:
- KIT
$51.95 -
JAMES GASKET Trans Gasket Set - W/WL 33030-41
JAMES GASKET
$35.95Made in the U.S.A.DS173370- SKU:
- DS173370
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
$35.95 -
JAMES GASKET Top End Gasket Kit - Flathead 17031-40
JAMES GASKET
$60.95Top-quality gaskets, oil seals and O-rings necessary to rebuild an engine, Made in the U.S.A.DS173367- SKU:
- DS173367
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$60.95 -
JAMES GASKET Motor Gasket Set - K Model 17026-52
JAMES GASKET
$72.95To-quality gaskets, oil seals, and o-rings necessary to rebuild an engine, Made in the U.S.A.DS173357- SKU:
- DS173357
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- TYPE:
- COMPLETE
$72.95 -
JAMES GASKET Motor Gasket Set - 45" - Flathead 17026-40
JAMES GASKET
$83.95Contain gaskets, oil seals and O-rings necessary to completely rebuild a Panhead engine, Made in the U.S.A.DS173356- SKU:
- DS173356
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$83.95 -
JAMES GASKET Complete Motor Gasket Kit - XL 17026-71
JAMES GASKET
$125.95To-quality gaskets, oil seals, and o-rings necessary to rebuild an engine, Made in the U.S.A.DS173352- SKU:
- DS173352
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- COMPLETE
- UNITS:
- KIT
$125.95 -
JAMES GASKET Primary Gasket Kit 60538-85-K
JAMES GASKET
$75.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.DS173351- SKU:
- DS173351
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
$75.95 -
JAMES GASKET Trans Top Cover Gasket - Big Twin 34904-79
JAMES GASKET
$18.80Made in the U.S.A.DS173349- SKU:
- DS173349
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- TRANSMISSION TOP COVER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$18.80 -
JAMES GASKET Trans Cover Gasket - Big Twin 34904-86
JAMES GASKET
$18.80Made in the U.S.A.DS173343- SKU:
- DS173343
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP COVER
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$18.80 -
JAMES GASKET Top End Gasket Kit - Big Twin/EVO 17033-83
JAMES GASKET
$96.95Top-quality gaskets, oil seals and O-rings necessary to rebuild an engine, Made in the U.S.A.DS173342- SKU:
- DS173342
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.500'
- TYPE:
- TOP END
- UNITS:
- KIT
$96.95 -
JAMES GASKET Top End Gasket Kit - XL 17030-57
JAMES GASKET
$40.95Top-quality gaskets, oil seals and O-rings necessary to rebuild an engine, Made in the U.S.A.DS173335- SKU:
- DS173335
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$40.95 -
JAMES GASKET Complete Gasket Kit - Panhead 17028-48
JAMES GASKET
$90.95Contain gaskets, oil seals and O-rings necessary to completely rebuild a Panhead engine, Made in the U.S.A.DS173326- SKU:
- DS173326
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- UNITS:
- KIT
$90.95 -
JAMES GASKET Complete Motor Gasket Kit - Shovelhead 17029-70-A
JAMES GASKET
$152.95To-quality gaskets, oil seals, and o-rings necessary to rebuild an engine, Made in the U.S.A.DS173323- SKU:
- DS173323
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- RIDING STYLE:
- STREET
$152.95 -
JAMES GASKET Rocker Box Rubber Gasket - Big Twin 17033-83-R
JAMES GASKET
$75.95Made in the U.S.A.DS173321- SKU:
- DS173321
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$75.95 -
JAMES GASKET Cam Change Gasket Kit - Big Twin 25225-70-K
JAMES GASKET
$32.95Kits include all necessary gaskets, seals, O-rings and cork washers for doing a cam changeDS173319- SKU:
- DS173319
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- KIT
- TYPE:
- CAM CHANGE
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$32.95 -
JAMES GASKET Cam Change Gasket Kit - Big Twin 25225-93-K
JAMES GASKET
$33.95Kits include all necessary gaskets, seals, O-rings and cork washers for doing a cam changeDS173318- SKU:
- DS173318
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CAM CHANGE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$33.95 -
JAMES GASKET Rocker Box Rubber Gasket - Big Twin 17042-92
JAMES GASKET
$67.95Made in the U.S.A.DS173316- SKU:
- DS173316
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ROCKER BOX
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$67.95 -
JAMES GASKET Rocker Box Rubber Gasket - Big Twin 17038-90
JAMES GASKET
$49.95Made in the U.S.A.DS173315- SKU:
- DS173315
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$49.95 -
JAMES GASKET Big Bore Top End Gasket Kit - 80" 17033-92
JAMES GASKET
$128.95Top-quality gaskets, oil seals and O-rings necessary to rebuild an engine, Made in the U.S.A.DS173275- SKU:
- DS173275
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,045'
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.625'
- THICKNESS METRIC:
- 1.14 MM
- TYPE:
- TOP END
- UNITS:
- KIT
$128.95 -
JAMES GASKET Top End Gasket Kit - Big Twin 17033-83-A
JAMES GASKET
$96.95Top-quality gaskets, oil seals and O-rings necessary to rebuild an engine, Made in the U.S.A.DS173251- SKU:
- DS173251
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,045'
- THICKNESS METRIC:
- 1.14 MM
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$96.95
