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
-
REVOLUTION PERFORMANCE, LLC Ring Set RP4250VMF
REVOLUTION PERFORMANCE, LLC
$69.95If you're running nickel-silicon-carbide-plated bores, you need ring sets engineered specifically for that application—and that's exactly what the REVOLUTION PERFORMANCE RP4250VMF delivers. Gas nitride coating provides superior wear resistance and...09120917- SKU:
- 09120917
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.2:1
- PRODUCT NAME:
- RING SET
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- UNITS:
- SET
- BORE SIZE IMPERIAL:
- 4.250'
- DISPLACEMENT:
- 124'
- PISTON HEAD SHAPE:
- FLAT TOP
$69.95 -
REVOLUTION PERFORMANCE, LLC Ring Set RP4125VMF
REVOLUTION PERFORMANCE, LLC
$69.95If you're running a high-performance engine with nickel-silicon-carbide-plated cylinder bores, ring selection directly impacts compression, blow-by control, and longevity under sustained load. The REVOLUTION PERFORMANCE Ring Set RP4125VMF delivers gas...09120919- SKU:
- 09120919
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON HEAD SHAPE:
- DOMED
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- BORE SIZE IMPERIAL:
- 4.125'
- DISPLACEMENT:
- 124'
- PRODUCT NAME:
- RING SET
- RIDING STYLE:
- STREET
$69.95 -
REVOLUTION PERFORMANCE, LLC Ring Set RPS2M8535.STD-C
REVOLUTION PERFORMANCE, LLC
$102.95If you're running nickel-silicon-carbide-plated cylinder bores, this ring set is engineered specifically for that combination—gas nitride coating ensures optimal sealing, reduced blowby, and extended ring life under high-boost and competition conditions...09120920- SKU:
- 09120920
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- DISPLACEMENT:
- 143'
- PISTON HEAD SHAPE:
- FLAT TOP
- PRODUCT NAME:
- RING SET
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 139'
- UNITS:
- SET
- BORE SIZE IMPERIAL:
- 4.500'
$102.95 -
REVOLUTION PERFORMANCE, LLC Ring Set RP9050XX
REVOLUTION PERFORMANCE, LLC
$69.95If you're running a high-performance or racing engine with nickel-silicon-carbide-plated cylinder bores, this ring set delivers the seal integrity and durability your build demands. Gas nitride coating provides superior wear resistance and thermal...09120921- SKU:
- 09120921
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- STROKE LENGTH IMPERIAL:
- 3-15/16'
- UNITS:
- SET
- PRODUCT NAME:
- RING SET
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.563'
- DISPLACEMENT:
- 1250 CC
$69.95 -
REVOLUTION PERFORMANCE, LLC Ring Set RP3875XK
REVOLUTION PERFORMANCE, LLC
$58.95Piston ring wear is one of the fastest paths to power loss and compression failure in high-performance engines. The RP3875XK delivers the durability and precision fit your build demands, with gas nitride coating engineered specifically for...09120922- SKU:
- 09120922
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.8:1
- PRODUCT NAME:
- RING SET
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- DISPLACEMENT:
- 90'
- PISTON HEAD SHAPE:
- FLAT TOP
- UNITS:
- SET
$58.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-101W
REVOLUTION PERFORMANCE, LLC
$1,479.95Whether you're pushing peak RPM on the track or maximizing displacement in your build, a quality cylinder kit is fundamental to engine reliability and performance. The REVOLUTION PERFORMANCE, LLC RP201-101W delivers precision-engineered components...09311026- SKU:
- 09311026
- Availability:
- Ships Same Business Day
- Weight:
- 22.71 LBS
- STROKE LENGTH IMPERIAL:
- 4'
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- DISPLACEMENT:
- 98'
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.9375'
- COLOR/FINISH:
- NATURAL
- PRODUCT NAME:
- CYLINDER KIT
$1,479.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-110W
REVOLUTION PERFORMANCE, LLC
$1,479.95A quality cylinder kit is the foundation of engine reliability and performance consistency. Whether you're rebuilding for durability or chasing peak horsepower, the REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-110W delivers precision-engineered...09311028- SKU:
- 09311028
- Availability:
- Ships Same Business Day
- Weight:
- 22.71 LBS
- COLOR/FINISH:
- NATURAL
- COMPRESSION RATIO IMPERIAL:
- 9.3:1
- BORE SIZE IMPERIAL:
- 3.9375'
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 98'
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4'
- UNITS:
- KIT
$1,479.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-111W
REVOLUTION PERFORMANCE, LLC
$1,479.95A quality cylinder kit is essential for maintaining peak engine performance and reliability during high-demand racing or heavy-duty applications. The REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-111W delivers the precision engineering and durability...09311029- SKU:
- 09311029
- Availability:
- Ships Same Business Day
- Weight:
- 22.81 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.3:1
- BORE SIZE IMPERIAL:
- 3.9375'
- COLOR/FINISH:
- BLACK
- UNITS:
- KIT
- COLOR/FINISH:
- HIGHLIGHTED FINS
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4'
- DISPLACEMENT:
- 98'
- RIDING STYLE:
- STREET
$1,479.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-140TM
REVOLUTION PERFORMANCE, LLC
$1,599.95A precision cylinder kit is essential for anyone building or rebuilding a high-performance engine—it directly impacts compression ratio, displacement, and overall power output. The REVOLUTION PERFORMANCE, LLC RP201-140TM delivers the dimensional accuracy...09311036- SKU:
- 09311036
- Availability:
- Ships Same Business Day
- Weight:
- 21.86 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- DISPLACEMENT:
- 124'
- PRODUCT NAME:
- CYLINDER KIT
$1,599.95Qty in Cart: 0Quantity:Price:$1,599.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-608W
REVOLUTION PERFORMANCE, LLC
$1,529.95If you're serious about extracting maximum performance from your engine, a quality cylinder kit is non-negotiable. The REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-608W delivers precision-engineered components built to handle sustained high-RPM...09311041- SKU:
- 09311041
- Availability:
- Ships Same Business Day
- Weight:
- 24.41 LBS
- BORE SIZE IMPERIAL:
- 4.250'
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- DISPLACEMENT:
- 128'
- UNITS:
- KIT
$1,529.95Qty in Cart: 0Quantity:Price:$1,529.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-171W
REVOLUTION PERFORMANCE, LLC
$1,529.95A quality cylinder kit is foundational to any high-performance engine build, directly impacting displacement, compression, and overall power output. The REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-171W delivers the precision engineering and durability...09311042- SKU:
- 09311042
- Availability:
- Ships Same Business Day
- Weight:
- 21.26 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- PRODUCT NAME:
- CYLINDER KIT
- DISPLACEMENT:
- 117'
- STROKE LENGTH IMPERIAL:
- 4-3/8'
$1,529.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-171WG
REVOLUTION PERFORMANCE, LLC
$1,529.95A cylinder kit is one of the most critical upgrades for serious engine builders looking to maximize displacement, compression, and overall performance potential. Whether you're building a high-revving race engine or restoring a classic with modern power,...09311043- SKU:
- 09311043
- Availability:
- Ships Same Business Day
- Weight:
- 21.31 LBS
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COLOR/FINISH:
- GRANITE
- COLOR/FINISH:
- HIGHLIGHTED FINS
- DISPLACEMENT:
- 117'
- BORE SIZE IMPERIAL:
- 4.125'
- UNITS:
- KIT
$1,529.95Qty in Cart: 0Quantity:Price:$1,529.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-172WB
REVOLUTION PERFORMANCE, LLC
$1,529.95Whether you're rebuilding a high-revving two-stroke or pushing displacement limits on a precision-tuned engine, a quality cylinder kit is the foundation of reliable power delivery and longevity. The REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-172WB...09311044- SKU:
- 09311044
- Availability:
- Ships Same Business Day
- Weight:
- 21.51 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- HIGHLIGHTED FINS
- DISPLACEMENT:
- 117'
- BORE SIZE IMPERIAL:
- 4.125'
- UNITS:
- KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
$1,529.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-129W
REVOLUTION PERFORMANCE, LLC
$1,599.95A quality cylinder kit is the foundation of any high-performance engine build, directly impacting compression ratio, displacement, and overall reliability under sustained load. The REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-129W delivers...09311048- SKU:
- 09311048
- Availability:
- Ships Same Business Day
- Weight:
- 21.21 LBS
- BORE SIZE IMPERIAL:
- 4.250'
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- HIGHLIGHTED FINS
- DISPLACEMENT:
- 131'
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- KIT
$1,599.95Qty in Cart: 0Quantity:Price:$1,599.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-135W
REVOLUTION PERFORMANCE, LLC
$1,599.95A precision cylinder kit is essential for any serious engine build or rebuild—it directly impacts compression ratio, displacement, and overall engine longevity. The RP201-135W delivers OEM-quality construction with tight tolerances, ensuring reliable...09311049- SKU:
- 09311049
- Availability:
- Ships Same Business Day
- Weight:
- 21.26 LBS
- DISPLACEMENT:
- 131'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.250'
- COLOR/FINISH:
- GRANITE
- COLOR/FINISH:
- HIGHLIGHTED FINS
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-5/8'
$1,599.95Qty in Cart: 0Quantity:Price:$1,599.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-611W
REVOLUTION PERFORMANCE, LLC
$1,899.95A quality cylinder kit is fundamental to engine reliability and performance consistency. Whether you're rebuilding a worn powerplant or upgrading to tighter tolerances, the REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-611W delivers the precision...09311050- SKU:
- 09311050
- Availability:
- Ships Same Business Day
- Weight:
- 23.56 LBS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE SIZE IMPERIAL:
- 4.500'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- UNITS:
- KIT
- DISPLACEMENT:
- 139'
$1,899.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-616W
REVOLUTION PERFORMANCE, LLC
$1,899.95A precision cylinder kit is essential for builders pushing displacement or compression limits—whether you're restoring a vintage engine or maximizing modern performance. The Revolution Performance RP201-616W delivers OEM-quality tolerances and...09311052- SKU:
- 09311052
- Availability:
- Ships Same Business Day
- Weight:
- 23.51 LBS
- COLOR/FINISH:
- BLACK
- DISPLACEMENT:
- 143'
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- BORE SIZE IMPERIAL:
- 4.500'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- UNITS:
- KIT
$1,899.95Qty in Cart: 0Quantity:Price:$1,899.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit - 85" - Natural Silver RP201-213W
REVOLUTION PERFORMANCE, LLC
$1,479.95If you're looking to unlock genuine horsepower gains without pulling your engine apart for machine work, the Revolution Performance 85" Cylinder Kit delivers. The aerospace-grade aluminum construction with nickel-silicon-carbide electroplated bores...09311057- SKU:
- 09311057
- Availability:
- Ships Same Business Day
- Weight:
- 20.96 LBS
- COLOR/FINISH:
- SILVER
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3-9/16'
- PRODUCT NAME:
- BIG BORE CYLINDER KIT
- FEATURES:
- FLAT TOP
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- DISPLACEMENT:
- 85'
$1,479.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit - 85" - Black with Highlighted Fins RP201-212W
REVOLUTION PERFORMANCE, LLC
$1,479.95If you're serious about extracting maximum horsepower from your big-bore build, the Revolution Performance 85" Cylinder Kit eliminates the machine work and guesswork. The aerospace-grade aluminum construction with nickel-silicon-carbide electroplated...09311058- SKU:
- 09311058
- Availability:
- Ships Same Business Day
- Weight:
- 22.00 LBS
- COLOR/FINISH:
- HIGHLIGHTED FINS
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- BORE SIZE IMPERIAL:
- 3-9/16'
- DISPLACEMENT:
- 85'
- PRODUCT NAME:
- BIG BORE CYLINDER KIT
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- COLOR/FINISH:
- BLACK
- FEATURES:
- FLAT TOP
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$1,479.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit - 109" - Black with Highlighted Fins RP201-216W
REVOLUTION PERFORMANCE, LLC
$1,455.95A 109" displacement demands cylinders engineered for serious power output—Revolution Performance delivers with aerospace-grade aluminum construction and nickel-silicon-carbide bores that eliminate the need for traditional sleeving, letting you push...09311064- SKU:
- 09311064
- Availability:
- Ships Same Business Day
- Weight:
- 19.36 LBS
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3-7/8'
- DISPLACEMENT:
- 109'
- MODEL:
- MONSTER
- PRODUCT NAME:
- BIG BORE CYLINDER KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
$1,455.95
