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
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Wiseco Piston Kit 1948-1980 Harley-Davidson Big Twin 74ci 9:1 Compression K1611
WISECO
$378.95If you're rebuilding or overboring a classic Big Twin, piston quality directly impacts reliability and power output. The Wiseco K1611 delivers forged construction and precision engineering specifically matched to 1948-1980 Harley applications,...K1611- SKU:
- K1611
- Availability:
- Ships Same Business Day
- Weight:
- 3.38 LBS
- BORE - OVERSIZE:
- +0,060'
- BORE SIZE IMPERIAL:
- 3.497'
- DISPLACEMENT:
- 1249 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.060'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- TYPE:
- TOP END
- UNITS:
- EACH
$378.95Qty in Cart: 0Quantity:Price:$378.95Subtotal: -
Wiseco Piston Kit 1948-1980 Harley-Davidson FLH 3.517in. Bore K1612
WISECO
$344.95If you're rebuilding a classic Big Twin top end or planning an overbore on your 1948-1980 Harley-Davidson FLH, the Wiseco K1612 piston kit delivers the forged strength and precision fit required for reliable, long-term performance. High-silicon aluminum...K1612- SKU:
- K1612
- Availability:
- Ships Same Business Day
- Weight:
- 3.44 LBS
- BORE SIZE IMPERIAL:
- 3.517'
- DISPLACEMENT:
- 1263 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- +0,080'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- BORE OVERSIZE - IMPERIAL:
- +0.080'
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- TYPE:
- TOP END
$344.95Qty in Cart: 0Quantity:Price:$344.95Subtotal: -
Wiseco Piston Kit 1978-1984 Harley-Davidson FLH K1614
WISECO
$384.95A properly rebuilt top end is fundamental to reliable Big Twin performance, and this Wiseco kit delivers the precision components needed for a complete, professional-grade rebuild. Whether you're recovering from ring wear, overboring for increased...K1614- SKU:
- K1614
- Availability:
- Ships Same Business Day
- Weight:
- 2.81 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- DISPLACEMENT:
- 1345 CC
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,010'
- PISTON MATERIAL:
- FORGED
- COMPRESSION RATIO IMPERIAL:
- 7.0:1
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE SIZE IMPERIAL:
- 3.508'
- PISTON MATERIAL:
- ALUMINUM ALLOY
$384.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-600W
REVOLUTION PERFORMANCE, LLC
$783.95Custom-forged pistons are the foundation of reliable high-RPM performance, and the REVOLUTION PERFORMANCE RP301-600W delivers the strength and precision needed to withstand extreme combustion pressures without sacrificing efficiency. Built with...09106382- SKU:
- 09106382
- Availability:
- Ships Same Business Day
- Weight:
- 3.90 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.2:1
- PISTON HEAD SHAPE:
- FLAT TOP
- DISPLACEMENT:
- 139'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.500'
- STROKE LENGTH IMPERIAL:
- 4-3/8'
$783.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-604W
REVOLUTION PERFORMANCE, LLC
$783.95High-performance pistons are the foundation of reliable top-end power. Revolution Performance's RP301-604W kit delivers the thermal stability and strength needed to sustain aggressive boost pressures and extended high-RPM operation without sacrificing...09106383- SKU:
- 09106383
- Availability:
- Ships Same Business Day
- Weight:
- 3.80 LBS
- DISPLACEMENT:
- 143'
- PISTON HEAD SHAPE:
- FLAT TOP
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 4.500'
$783.95Qty in Cart: 0Quantity:Price:$783.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Piston Kit - 85" - Evolution RP301-207W
REVOLUTION PERFORMANCE, LLC
$495.95If you've already committed to a big bore kit, the right piston set is non-negotiable for reliability and peak power delivery. Revolution Performance's 85" piston kit is engineered to maximize ring seal and heat dissipation in your Evolution engine,...09106384- SKU:
- 09106384
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- DISPLACEMENT:
- 85'
- PISTON HEAD SHAPE:
- FLAT TOP
- BORE SIZE IMPERIAL:
- 3-9/16'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- STYLE:
- BIG BORE
- UNITS:
- KIT
$495.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit - 85" - Evolution RP301-208W
REVOLUTION PERFORMANCE, LLC
$495.95If you're running a big bore kit on your Evolution engine, this piston kit is essential maintenance or an upgrade path for maximum displacement and power. REVOLUTION PERFORMANCE's 85" pistons are precision-engineered to handle the increased cylinder...09106385- SKU:
- 09106385
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- DISPLACEMENT:
- 85'
- PRODUCT NAME:
- PISTON KIT
- PISTON HEAD SHAPE:
- DOMED
- STYLE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3-9/16'
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- STROKE LENGTH IMPERIAL:
- 4-1/4'
$495.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit - 92" - Evolution RP301-413W
REVOLUTION PERFORMANCE, LLC
$481.95When you've committed to a big bore kit, your original pistons simply can't handle the displacement increase and power demands. This Revolution Performance piston kit delivers the strength and precision engineering required to safely maximize your 92"...09106386- SKU:
- 09106386
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- BORE SIZE IMPERIAL:
- 3-9/16'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 92'
- PISTON HEAD SHAPE:
- FLAT TOP
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- STYLE:
- BIG BORE
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- UNITS:
- KIT
$481.95Qty in Cart: 0Quantity:Price:$481.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-414W
REVOLUTION PERFORMANCE, LLC
$495.95A high-performance piston kit built for sustained power and reliability under extreme combustion pressures. The RP301-414W delivers reduced thermal expansion and superior durability—critical when you're pushing engine limits at the track or in...09106389- SKU:
- 09106389
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- BORE SIZE IMPERIAL:
- 3.563'
- COMPRESSION RATIO IMPERIAL:
- 10.1:1
- DISPLACEMENT:
- 1250 CC
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- DISHED
- STROKE LENGTH IMPERIAL:
- 3-15/16'
$495.95 -
REVOLUTION PERFORMANCE, LLC Ring Set RP3937VMF
REVOLUTION PERFORMANCE, LLC
$69.95Ring wear is one of the fastest ways to lose compression and power in a high-performance engine. The RP3937VMF delivers gas nitride coating that handles extreme combustion pressures while sealing against nickel-silicon-carbide-plated bores with precision...09120915- SKU:
- 09120915
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE SIZE IMPERIAL:
- 3.937'
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 107'
- UNITS:
- SET
- PISTON HEAD SHAPE:
- FLAT TOP
- PRODUCT NAME:
- RING SET
$69.95 -
REVOLUTION PERFORMANCE, LLC Ring Set RP4060VMF
REVOLUTION PERFORMANCE, LLC
$69.95High-performance piston rings must seal precisely under extreme combustion pressures and temperatures. The RP4060VMF delivers superior ring-to-bore contact through gas nitride coating, engineered specifically for nickel-silicon-carbide-plated cylinder...09120916- SKU:
- 09120916
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE IMPERIAL:
- 4.060'
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- UNITS:
- SET
- DISPLACEMENT:
- 113'
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- PISTON HEAD SHAPE:
- DOMED
- PRODUCT NAME:
- RING SET
- RIDING STYLE:
- STREET
$69.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit - Twin Cam RP9902
REVOLUTION PERFORMANCE, LLC
$89.95A quality gasket kit is non-negotiable for any Twin Cam engine rebuild or top-end refresh. The RP9902 ensures proper sealing across all critical surfaces, preventing oil leaks and combustion blow-by that compromise performance and engine longevity. Built...09347156- SKU:
- 09347156
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit - 113" - Twin Cam RP10085-030-HB
REVOLUTION PERFORMANCE, LLC
$89.95A quality gasket kit is fundamental to maintaining compression integrity and preventing fluid leaks in high-performance applications. The REVOLUTION PERFORMANCE, LLC Gasket Kit for 113" Twin Cam engines delivers OEM-grade sealing with the precision fit...09347157- SKU:
- 09347157
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit - 117" - Twin Cam RP9925-036-030
REVOLUTION PERFORMANCE, LLC
$89.95A quality gasket kit is essential for maintaining proper compression and preventing oil leaks in high-performance engines—especially in forced induction applications where seal integrity directly impacts reliability and power delivery. The REVOLUTION...09347160- SKU:
- 09347160
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit RP9926
REVOLUTION PERFORMANCE, LLC
$89.95A properly sealed engine is the foundation of reliable performance, and worn or degraded gaskets compromise compression, increase oil leakage, and invite coolant breaches that can derail your racing schedule or weekend build. The Revolution Performance...09347161- SKU:
- 09347161
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit - M8 RP10193HB027014
REVOLUTION PERFORMANCE, LLC
$89.95A quality gasket kit is foundational to engine reliability—it seals critical surfaces under extreme heat and pressure, preventing oil leaks and combustion blowby that compromise performance and longevity. The REVOLUTION PERFORMANCE M8 RP10193HB027014...09347162- SKU:
- 09347162
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit - 85"/92" RP9791
REVOLUTION PERFORMANCE, LLC
$89.95A complete gasket kit is fundamental to maintaining compression integrity and preventing fluid leakage across your engine's critical sealing points. Revolution Performance's RP9791 kit delivers OEM-equivalent sealing for 85" and 92" displacement engines,...09347163- SKU:
- 09347163
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE SIZE:
- 3-9/16'
- BORE SIZE IMPERIAL:
- 3-9/16'
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit - 100"/109" RP9993-030
REVOLUTION PERFORMANCE, LLC
$89.95A complete gasket kit is the foundation of a reliable high-displacement engine build. Whether you're assembling a fresh 100" or 109" big-block for street or strip duty, using quality OEM-spec gaskets ensures proper sealing across all critical engine...09347164- SKU:
- 09347164
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- BORE SIZE:
- 3-7/8'
- BORE SIZE IMPERIAL:
- 3-7/8'
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit RP9791-040-020
REVOLUTION PERFORMANCE, LLC
$89.95A quality gasket kit is the foundation of any reliable engine assembly—proper sealing prevents fluid leaks, maintains compression integrity, and protects against contamination that can compromise performance. The Revolution Performance RP9791-040-020...09347165- SKU:
- 09347165
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$89.95Qty in Cart: 0Quantity:Price:$89.95Subtotal: -
PERFORMANCE MACHINE (PM) Ignition Cover - Chrome - M8 0177-2064-CH
PERFORMANCE MACHINE (PM)
$133.95The PM Ignition Cover delivers clean, purposeful aesthetics without compromising functionality. This direct replacement upgrades your M8's appearance with precision machining while maintaining OEM compatibility—no modifications or adapters needed...09401686- SKU:
- 09401686
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COLOR/FINISH:
- CHROME
- STYLE:
- CHROME
- MODEL:
- SCALLOP
- PRODUCT NAME:
- COVER
- TYPE:
- IGNITION
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$133.95Qty in Cart: 0Quantity:Price:$133.95Subtotal:
