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
-
On Sale
EASTERN MOTORCYCLE PARTS Oil Pump Relief Spring A-26207-83
EASTERN MOTORCYCLE PARTS
Now: $6.10Was: $6.70A worn or compromised oil pump relief spring directly impacts engine protection and oil pressure stability across your Big Twin's operating range. This OEM-spec replacement ensures consistent...DS194207- SKU:
- DS194207
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- TYPE:
- RELIEF
- PRODUCT NAME:
- SPRING
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
Now: $6.10Was: $6.70Qty in Cart: 0Quantity:Price:Now: $6.10Was: $6.70Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Steel Breather Valve Washer Kit - Big Twin A-25302-SET
EASTERN MOTORCYCLE PARTS
MSRP: $31.95Now: $29.07Was: $31.95Precision breather valve calibration is critical for maintaining proper crankcase pressure and preventing seal degradation in Big Twin engines. This comprehensive washer kit eliminates guesswork by...DS194159- SKU:
- DS194159
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- WASHER
- UNITS:
- SET
- RIDING STYLE:
- STREET
- TYPE:
- BREATHER
MSRP: $31.95Now: $29.07Was: $31.95Qty in Cart: 0Quantity:Price:MSRP: $31.95Now: $29.07Was: $31.95Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Check Valve Spring A-26363-36
EASTERN MOTORCYCLE PARTS
Now: $8.55Was: $9.40A reliable check valve spring is essential for maintaining proper fuel and oil flow in your motorcycle's carburetor and fuel system. When this spring loses tension or fails, you risk fuel leakage,...DS194223- SKU:
- DS194223
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- PRODUCT NAME:
- SPRING
- RIDING STYLE:
- STREET
- TYPE:
- CHECK VALVE
Now: $8.55Was: $9.40Qty in Cart: 0Quantity:Price:Now: $8.55Was: $9.40Subtotal: -
On Sale
EASTERN MOTORCYCLE PARTS Oil Pump Bushing/Gasket Kit 17-0129
EASTERN MOTORCYCLE PARTS
MSRP: $16.95Now: $15.42Was: $16.95A worn oil pump bushing or failed gasket compromises oil circulation and can lead to catastrophic engine damage. This Eastern Motorcycle Parts kit restores proper oil flow and sealing integrity with...DS194202- SKU:
- DS194202
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
MSRP: $16.95Now: $15.42Was: $16.95 -
On Sale
EASTERN MOTORCYCLE PARTS Idler Gear and Circuit Breaker Bushings A-25785-30A
EASTERN MOTORCYCLE PARTS
MSRP: $24.95Now: $22.70Was: $24.95Idler gear bushings are critical to maintaining smooth power transmission and preventing premature wear in your engine's timing system. A worn or damaged bushing compromises gear alignment and...DS194192- SKU:
- DS194192
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- IDLER GEAR
- UNITS:
- PAIR
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
MSRP: $24.95Now: $22.70Was: $24.95 -
Wiseco 1988-2003 Harley-Davidson Sportster 1200 XLH Piston Kit K1685
WISECO
$447.95When you're ready to extract genuine performance gains from your 1200 Sportster, piston quality becomes non-negotiable. The Wiseco K1685 delivers the strength and precision needed for a reliable...K1685- SKU:
- K1685
- Availability:
- Ships Same Business Day
- Weight:
- 2.31 LBS
- DISPLACEMENT:
- 1200 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- BORE SIZE IMPERIAL:
- 3.498'
- TYPE:
- TOP END
- UNITS:
- EACH
$447.95Qty in Cart: 0Quantity:Price:$447.95Subtotal: -
Wiseco Piston Kit 1984-1999 Harley-Davidson FLHRI Road King Classic K1665
WISECO
$447.95A worn or damaged top end forces you to choose between costly downtime and compromised performance. The Wiseco K1665 Piston Kit delivers a complete, engineered solution for overboring or full top-end...K1665- SKU:
- K1665
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 1340 CC
$447.95 -
Wiseco Piston Kit 1978-1984 Harley-Davidson Electra Glide FLH High Compression K1627
WISECO
$422.95If you're rebuilding a 1978-1984 Harley-Davidson Big Twin, you need pistons engineered to handle sustained high RPMs and heat cycles without compromise. The Wiseco K1627 High Compression Piston Kit...K1627- SKU:
- K1627
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE - OVERSIZE:
- +0,040'
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- DISPLACEMENT:
- 1367 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.040'
- BORE SIZE IMPERIAL:
- 3.537'
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- TYPE:
- TOP END
- UNITS:
- EACH
$422.95Qty in Cart: 0Quantity:Price:$422.95Subtotal: -
Wiseco Piston Kit 1986-2003 Harley-Davidson Sportster 883 XLH 0.010 Oversize K1656
WISECO
$409.95Whether you're rebuilding a tired 883 or maximizing displacement with an overbore, the Wiseco Piston Kit K1656 delivers the strength and precision your Sportster needs. High-silicon aluminum alloy...K1656- SKU:
- K1656
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- BORE - OVERSIZE:
- +0,010'
- BORE SIZE IMPERIAL:
- 3.508'
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PISTON MATERIAL:
- ALUMINUM
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- DISPLACEMENT:
- 1200 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
$409.95Qty in Cart: 0Quantity:Price:$409.95Subtotal: -
Wiseco Piston Kit for 1986-2003 Kawasaki ZG1200 Voyager 1196cc K1662
WISECO
$447.95A top-end rebuild on your ZG1200 Voyager demands precision components that can handle sustained power delivery without compromise. Wiseco's forged piston kit delivers the strength and reliability...K1662- SKU:
- K1662
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE - OVERSIZE:
- +0,020'
- PISTON MATERIAL:
- ALUMINUM
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- UNITS:
- EACH
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- DISPLACEMENT:
- 1200 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
$447.95 -
REVOLUTION PERFORMANCE, LLC Ring Set RPS2M8510.STD-C
REVOLUTION PERFORMANCE, LLC
$69.95If you're running a modern performance engine with nickel-silicon-carbide-plated cylinders, these gas nitride-coated rings deliver the seal integrity and wear resistance your build demands...09120918- SKU:
- 09120918
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE IMPERIAL:
- 4.250'
- PISTON HEAD SHAPE:
- FLAT TOP
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- UNITS:
- SET
- PRODUCT NAME:
- RING SET
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 128'
$69.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-103W
REVOLUTION PERFORMANCE, LLC
$1,479.95A quality cylinder kit is the foundation of reliable engine performance, whether you're rebuilding a worn powerplant or upgrading for increased displacement. The REVOLUTION PERFORMANCE, LLC Cylinder...09311027- SKU:
- 09311027
- Availability:
- Ships Same Business Day
- Weight:
- 22.50 LBS
- COLOR/FINISH:
- HIGHLIGHTED FINS
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- DISPLACEMENT:
- 98'
- BORE SIZE IMPERIAL:
- 3.9375'
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4'
- UNITS:
- KIT
$1,479.95Qty in Cart: 0Quantity:Price:$1,479.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-119W
REVOLUTION PERFORMANCE, LLC
$1,479.95A quality cylinder kit is fundamental to engine reliability and performance consistency. Whether you're building a high-revving race engine or restoring a precision powerplant, the REVOLUTION...09311030- SKU:
- 09311030
- Availability:
- Ships Same Business Day
- Weight:
- 22.56 LBS
- BORE SIZE IMPERIAL:
- 3.9375'
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 107'
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- UNITS:
- KIT
$1,479.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-119WD
REVOLUTION PERFORMANCE, LLC
$1,479.95A precision cylinder kit is essential for building or rebuilding high-performance engines that demand exact bore tolerances and reliable ring sealing. The REVOLUTION PERFORMANCE, LLC Cylinder Kit...09311032- SKU:
- 09311032
- Availability:
- Ships Same Business Day
- Weight:
- 22.66 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- DISPLACEMENT:
- 107'
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- BORE SIZE IMPERIAL:
- 3.9375'
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$1,479.95Qty in Cart: 0Quantity:Price:$1,479.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-174W
REVOLUTION PERFORMANCE, LLC
$1,479.95Upgrading to a precision-engineered cylinder kit is essential for builders pursuing maximum displacement and consistent performance gains without compromising engine reliability. The RP201-174W...09311034- SKU:
- 09311034
- Availability:
- Ships Same Business Day
- Weight:
- 22.21 LBS
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- DISPLACEMENT:
- 113'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.060'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- PRODUCT NAME:
- CYLINDER KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
$1,479.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-177W
REVOLUTION PERFORMANCE, LLC
$1,479.95A high-performance cylinder kit is essential for builders pursuing maximum displacement and power output without compromising structural integrity. This precision-engineered solution delivers the...09311035- SKU:
- 09311035
- Availability:
- Ships Same Business Day
- Weight:
- 22.31 LBS
- COLOR/FINISH:
- BLACK GRANITE
- DISPLACEMENT:
- 113'
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE SIZE IMPERIAL:
- 4.060'
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- PRODUCT NAME:
- CYLINDER KIT
$1,479.95Qty in Cart: 0Quantity:Price:$1,479.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-601W
REVOLUTION PERFORMANCE, LLC
$1,529.95A quality cylinder kit is fundamental to building a reliable, high-output engine—whether you're restoring a classic, upgrading a street machine, or competing on the track. The REVOLUTION PERFORMANCE,...09311037- SKU:
- 09311037
- Availability:
- Ships Same Business Day
- Weight:
- 25.40 LBS
- COLOR/FINISH:
- HIGHLIGHTED FINS
- COMPRESSION RATIO IMPERIAL:
- 11.2:1
- BORE SIZE IMPERIAL:
- 4.250'
- DISPLACEMENT:
- 124'
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COLOR/FINISH:
- BLACK
- UNITS:
- KIT
$1,529.95 -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-603W
REVOLUTION PERFORMANCE, LLC
$1,529.95A quality cylinder kit is the foundation of any reliable high-performance engine build. The REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-603W delivers precision-engineered components designed to...09311038- SKU:
- 09311038
- Availability:
- Ships Same Business Day
- Weight:
- 24.41 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.2:1
- DISPLACEMENT:
- 124'
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.250'
$1,529.95Qty in Cart: 0Quantity:Price:$1,529.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-606W
REVOLUTION PERFORMANCE, LLC
$1,529.95REVOLUTION PERFORMANCE, LLC Cylinder Kit09311039- SKU:
- 09311039
- Availability:
- Ships Same Business Day
- Weight:
- 24.26 LBS
- DISPLACEMENT:
- 128'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.250'
- COLOR/FINISH:
- HIGHLIGHTED FINS
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- COLOR/FINISH:
- BLACK
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- RIDING STYLE:
- STREET
$1,529.95Qty in Cart: 0Quantity:Price:$1,529.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Cylinder Kit RP201-607W
REVOLUTION PERFORMANCE, LLC
$1,529.95A precision cylinder kit is essential for engine rebuilds and high-performance applications where stock components won't cut it. The RP201-607W delivers the bore accuracy and material quality...09311040- SKU:
- 09311040
- Availability:
- Ships Same Business Day
- Weight:
- 25.40 LBS
- DISPLACEMENT:
- 128'
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK GRANITE
- BORE SIZE IMPERIAL:
- 4.250'
- PRODUCT NAME:
- CYLINDER KIT
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- RIDING STYLE:
- STREET
$1,529.95Qty in Cart: 0Quantity:Price:$1,529.95Subtotal:
