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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On Sale
Wiseco Piston Ring Set 3.880in for Harley-Davidson Twin Cam 1999-2017 3880VM
WISECO
MSRP: $49.95Now: $42.00Was: $49.95The WISECO Piston Ring Set 3880VM is designed for high-performance engines, offering exceptional durability and reliability. This set includes replacement rings for a single piston, ensuring optimal compression and efficiency. Upgrade your engine's...09120286- SKU:
- 09120286
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BORE - OVERSIZE:
- +0,005'
- MODEL:
- VM SERIES
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- RING MATERIAL:
- STEEL
- UNITS:
- SET
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- BORE SIZE IMPERIAL:
- 3.875'
- DISPLACEMENT:
- 95'
MSRP: $49.95Now: $42.00Was: $49.95 -
On Sale
Wiseco Piston Ring Set 3875XK for Harley-Davidson 103" 2007-2017
WISECO
MSRP: $44.95Now: $38.00Was: $44.95The WISECO Piston Ring Set 3875XK is designed for optimal performance and durability, ensuring your engine runs smoothly. This set includes replacement rings tailored for one piston, making it an ideal choice for precision engine rebuilds. Upgrade your...09120145- SKU:
- 09120145
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- PISTON RING
- MODEL:
- X SERIES
- RING MATERIAL:
- STEEL
- UNITS:
- SET
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 103'
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.875'
MSRP: $44.95Now: $38.00Was: $44.95 -
On Sale
Wiseco 3880XK Ring Set for Harley-Davidson 103" Twin Cam 2007-2017
WISECO
MSRP: $44.95Now: $38.00Was: $44.95The WISECO Ring Set 3880XK is designed specifically for high-performance applications, providing optimal sealing and durability for your engine's piston. This set includes replacement rings for a single piston, ensuring a precise fit and enhanced...09120146- SKU:
- 09120146
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- DISPLACEMENT:
- 103'
- RING MATERIAL:
- STEEL
- UNITS:
- SET
- BORE - OVERSIZE:
- +0,005'
- MODEL:
- X SERIES
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON RING
MSRP: $44.95Now: $38.00Was: $44.95 -
On Sale
Wiseco Ring Set 3.437" Standard for Harley-Davidson FL 1948-1964 3437X
WISECO
MSRP: $49.95Now: $42.00Was: $49.95Upgrade your engine's performance with the WISECO Big Twin 3437X Ring Set, designed specifically for one piston replacement. This high-quality ring set ensures optimal sealing and efficiency, enhancing your motorcycle's power and longevity. ...3437X- SKU:
- 3437X
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE - OVERSIZE:
- STANDARD
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.437'
- MODEL:
- X-RING
- RING MATERIAL:
- STEEL
- UNITS:
- SET
MSRP: $49.95Now: $42.00Was: $49.95 -
On Sale
Wiseco Piston Ring Set for 1972-1985 Harley-Davidson XLH1000 XLCH XLX 1000 XLCR 3188X
WISECO
MSRP: $49.95Now: $42.00Was: $49.95The WISECO Ring Set XL 3188X is designed specifically for high-performance engines, ensuring optimal sealing and durability. This set includes replacement rings tailored for one piston, making it an ideal choice for enthusiasts looking to enhance their...3188X- SKU:
- 3188X
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.1875'
- RING MATERIAL:
- STEEL
- MODEL:
- X-RING
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- UNITS:
- SET
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
Wiseco Piston Kit Standard 1948-1964 Harley FL 1200cc K1605
WISECO
MSRP: $344.95Now: $293.00Was: $344.95Upgrade your motorcycle's performance with the WISECO Piston Kit, designed specifically for Big Twin models from 1948 to 1980. Crafted from high-silicon aluminum alloy, this kit ensures exceptional strength and reliability, making it ideal for both...K1605- SKU:
- K1605
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- BORE SIZE IMPERIAL:
- 3.437'
- DISPLACEMENT:
- 1200 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
MSRP: $344.95Now: $293.00Was: $344.95 -
On Sale
Wiseco Piston Kit 0.020 1948-1964 Harley FLH K1607
WISECO
MSRP: $344.95Now: $293.00Was: $344.95Upgrade your motorcycle's performance with the WISECO Piston Kit, designed specifically for 1948-1980 Big Twin models. Crafted from a high-silicon aluminum alloy, this kit ensures exceptional strength and reliability, making it ideal for both overboring...K1607- SKU:
- K1607
- Availability:
- Ships Same Business Day
- Weight:
- 3.19 LBS
- BORE SIZE IMPERIAL:
- 3.457'
- PISTON MATERIAL:
- ALUMINUM ALLOY
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- BORE - OVERSIZE:
- +0,020'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- DISPLACEMENT:
- 1220 CC
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
MSRP: $344.95Now: $293.00Was: $344.95 -
On Sale
Wiseco Piston Kit 1948-1980 Harley-Davidson FLH Electra Glide 9:1 Compression K1608
WISECO
MSRP: $344.95Now: $293.00Was: $344.95Upgrade your engine's performance with the WISECO Piston Kit, designed specifically for 1948-1980 Big Twin models. Crafted from high-silicon aluminum alloy, this kit ensures exceptional strength and reliability, making it ideal for both overboring and...K1608- SKU:
- K1608
- Availability:
- Ships Same Business Day
- Weight:
- 3.31 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- BORE SIZE IMPERIAL:
- 3.467'
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- EACH
- DISPLACEMENT:
- 1227 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- BORE - OVERSIZE:
- +0,030'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
MSRP: $344.95Now: $293.00Was: $344.95 -
On Sale
Wiseco Piston Kit 1948-1964 Harley-Davidson FL 0.040" Oversize K1609
WISECO
MSRP: $344.95Now: $293.00Was: $344.95Upgrade your engine's performance with the WISECO Piston Kit, expertly crafted from high-silicon aluminum for exceptional durability and reliability. This comprehensive kit provides everything you need for a successful overbore or top-end rebuild,...K1609- SKU:
- K1609
- Availability:
- Ships Same Business Day
- Weight:
- 3.31 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- DISPLACEMENT:
- 1234 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- BORE OVERSIZE - IMPERIAL:
- +0.040'
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +0,040'
- BORE SIZE IMPERIAL:
- 3.477'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- RIDING STYLE:
- STREET
MSRP: $344.95Now: $293.00Was: $344.95 -
On Sale
Wiseco Piston Kit 1948-1980 Harley-Davidson Big Twin 74ci 9:1 Compression K1611
WISECO
MSRP: $344.95Now: $293.00Was: $344.95Experience unparalleled performance and reliability with the WISECO Piston Kit, expertly crafted from high-silicon aluminum alloy. This comprehensive kit includes everything you need for overboring or rebuilding your motorcycle's top end, ensuring a...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
MSRP: $344.95Now: $293.00Was: $344.95 -
On Sale
Wiseco Piston Kit 1948-1980 Harley-Davidson FLH 3.517in. Bore K1612
WISECO
MSRP: $344.95Now: $293.00Was: $344.95Upgrade your motorcycle's performance with the WISECO Piston Kit, designed specifically for Big Twin models from 1948 to 1980. Crafted from high-silicon aluminum alloy, this kit ensures exceptional strength and reliability, making it perfect for...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
MSRP: $344.95Now: $293.00Was: $344.95Qty in Cart: 0Quantity:Price:MSRP: $344.95Now: $293.00Was: $344.95Subtotal: -
On Sale
Wiseco Piston Kit 1978-1984 Harley-Davidson FLH K1614
WISECO
MSRP: $384.95Now: $327.00Was: $384.95Upgrade your engine's performance with the WISECO Piston Kit, expertly crafted from high-silicon aluminum alloy for unparalleled strength and reliability. This comprehensive kit includes everything you need for overboring or rebuilding your top end,...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
MSRP: $384.95Now: $327.00Was: $384.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-600W
REVOLUTION PERFORMANCE, LLC
$783.95Top-quality custom-forged piston kits manufactured with high-strength aluminum alloy, Include pistons with skirt coating, rings, chrome piston pins and retainer clips, High-tech manufacturing ensures greater operating strength and lower expansion at high...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
$783.95Top-quality custom-forged piston kits manufactured with high-strength aluminum alloy, Include pistons with skirt coating, rings, chrome piston pins and retainer clips, High-tech manufacturing ensures greater operating strength and lower expansion at high...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
$495.95Replacement piston kit for Bolt-On Big Bore Kit09106384- 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
$495.95Replacement piston kit for Bolt-On Big Bore Kit09106385- 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
$481.95Replacement piston kit for Bolt-On Big Bore Kit09106386- 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
$481.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-414W
REVOLUTION PERFORMANCE, LLC
$495.95Top-quality custom-forged piston kits manufactured with high-strength aluminum alloy, Include pistons with skirt coating, rings, chrome piston pins and retainer clips, High-tech manufacturing ensures greater operating strength and lower expansion at high...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
$69.95Gas nitride-coated rings offer the ultimate compatibility with nickel-silicon-carbide-plated bores, Replacement piston rings are available separately (sold as a set for one piston), Made in the U.S.A., Not recommended for use with cast-iron cylinders.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
$69.95Gas nitride-coated rings offer the ultimate compatibility with nickel-silicon-carbide-plated bores, Replacement piston rings are available separately (sold as a set for one piston), Made in the U.S.A., Not recommended for use with cast-iron cylinders.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
