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
KIBBLEWHITE Valve Keys - 4 pack - XL 20-4275
KIBBLEWHITE
MSRP: $33.30Now: $29.97Was: $33.30Valve keys are critical to maintaining precise valve timing and preventing catastrophic engine failure during high-RPM operation. KIBBLEWHITE's steel construction ensures reliable retention of valve...09260775- SKU:
- 09260775
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- KEY
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- TYPE:
- VALVE
- UNITS:
- 4 PACK
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- STREET
MSRP: $33.30Now: $29.97Was: $33.30 -
On Sale
KIBBLEWHITE Valve Keys - 8 pairs - Big Twin 51014-8
KIBBLEWHITE
MSRP: $35.32Now: $31.79Was: $35.32Valve keys are a critical maintenance component for Big Twin engines, ensuring your valvetrain stays secure and operates with precision. KIBBLEWHITE's steel construction and domestic manufacturing...09260777- SKU:
- 09260777
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- KEY
- TYPE:
- VALVE
- APPLICATION:
- INTAKE
- UNITS:
- 16 PACK
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- STREET
MSRP: $35.32Now: $31.79Was: $35.32 -
On Sale
KIBBLEWHITE Cast Iron Valve Seat - Exhaust 10-SC523
KIBBLEWHITE
MSRP: $12.80Now: $11.52Was: $12.80Exhaust valve seats endure extreme thermal cycling and combustion pressures—failure here means catastrophic engine damage. The Kibblewhite cast iron construction delivers superior machinability and...09260778- SKU:
- 09260778
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- INSIDE DIAMETER IMPERIAL:
- 1.562'
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER IMPERIAL:
- 2.0600'
- PRODUCT NAME:
- VALVE SEAT
- RIDING STYLE:
- STREET
- VALVE SEAT HEIGHT IMPERIAL:
- 11.4 MM
- MATERIAL:
- CAST IRON
MSRP: $12.80Now: $11.52Was: $12.80 -
On Sale
KIBBLEWHITE Cast Iron Valve Seat - Intake - Evolution 10-SC550
KIBBLEWHITE
MSRP: $13.37Now: $12.03Was: $13.37Valve seat integrity is critical to engine reliability and combustion efficiency—a worn or substandard seat compromises both. The KIBBLEWHITE Cast Iron Valve Seat for Evolution engines delivers the...09260779- SKU:
- 09260779
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE SEAT
- UNITS:
- EACH
- OUTSIDE DIAMETER IMPERIAL:
- 2.1640'
- INSIDE DIAMETER IMPERIAL:
- 1.750'
- RIDING STYLE:
- STREET
- MATERIAL:
- CAST IRON
- VALVE SEAT HEIGHT IMPERIAL:
- 11.4 MM
MSRP: $13.37Now: $12.03Was: $13.37 -
On Sale
KIBBLEWHITE Exhaust Valve - XL 20-4197-1
KIBBLEWHITE
MSRP: $54.10Now: $33.80Was: $54.10Exhaust valves endure extreme thermal cycling and high-velocity gas flow—factory units often fail prematurely under aggressive driving or high-RPM applications. The KIBBLEWHITE XL 20-4197-1 addresses...09260780- SKU:
- 09260780
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- HEAD DIAMETER IMPERIAL:
- 1.630'
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- LENGTH IMPERIAL:
- 3.512'
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.3384'
- TULIP ANGLE:
- 29°
- RIDING STYLE:
- STREET
MSRP: $54.10Now: $33.80Was: $54.10 -
On Sale
KIBBLEWHITE Exhaust Valve - Big Twin 20-4195S
KIBBLEWHITE
MSRP: $36.12Now: $27.91Was: $36.12If you're running a Big Twin engine that demands reliability under sustained high RPM, valve wear is your silent killer. KIBBLEWHITE's one-piece stainless-steel exhaust valves eliminate the weak link...09260781- SKU:
- 09260781
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- LENGTH IMPERIAL:
- 3.820'
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MODEL:
- BLACK DIAMOND™
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.3760'
- TULIP ANGLE:
- 29°
- HEAD DIAMETER IMPERIAL:
- 1.780'
- RIDING STYLE:
- STREET
MSRP: $36.12Now: $27.91Was: $36.12 -
On Sale
KIBBLEWHITE Exhaust Valve - Big Twin 20-4195-1
KIBBLEWHITE
MSRP: $36.12Now: $27.91Was: $36.12If you're running a Big Twin engine that demands reliability under high RPM and sustained heat cycles, valve degradation will kill your performance and longevity. KIBBLEWHITE's one-piece...09260782- SKU:
- 09260782
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- STEM DIAMETER IMPERIAL:
- 0.3760'
- UNITS:
- EACH
- LENGTH IMPERIAL:
- 3.820'
- APPLICATION:
- EXHAUST
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- TULIP ANGLE:
- 29°
- HEAD DIAMETER IMPERIAL:
- 1.812'
MSRP: $36.12Now: $27.91Was: $36.12 -
On Sale
KIBBLEWHITE Spring Kit 20-23550
KIBBLEWHITE
MSRP: $373.06Now: $335.75Was: $373.06If you're running a high-lift camshaft or boost, your stock valve springs are working against you—losing control under load and risking catastrophic valvetrain failure. The KIBBLEWHITE Spring Kit...09263349- SKU:
- 09263349
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- RIDING STYLE:
- STREET
- SPRING OPEN PRESSURE:
- 440 LB
- SPRING LIFT:
- 0,650'
- TYPE:
- VALVE
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- SPRING LIFT IMPERIAL:
- 0.650'
- SPRING SEAT PRESSURE:
- 185 IB
- UNITS:
- KIT
MSRP: $373.06Now: $335.75Was: $373.06 -
On Sale
KIBBLEWHITE Spring Kit 20-23650
KIBBLEWHITE
MSRP: $373.06Now: $335.75Was: $373.06If you're running a high-performance camshaft or forced induction setup, your stock valve springs are a liability—they simply can't handle the sustained high-RPM loads and valve lift demands of a...09263350- SKU:
- 09263350
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
- APPLICATION:
- INTAKE
- SPRING SEAT PRESSURE:
- 185 IB
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- SPRING LIFT IMPERIAL:
- 0.675'
- SPRING OPEN PRESSURE:
- 450 LB
- APPLICATION:
- EXHAUST
- SPRING LIFT:
- 0,675'
- TYPE:
- VALVE
MSRP: $373.06Now: $335.75Was: $373.06Qty in Cart: 0Quantity:Price:MSRP: $373.06Now: $335.75Was: $373.06Subtotal: -
On Sale
KIBBLEWHITE Valve Seat 10-HC350
KIBBLEWHITE
MSRP: $14.47Now: $13.02Was: $14.47If you're running titanium valves in a high-performance engine, you need a valve seat engineered specifically for that application—not a generic substitute. The KIBBLEWHITE 10-HC350 delivers the...09263351- SKU:
- 09263351
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- VALVE SEAT
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER METRIC:
- 26.00 MM
- RIDING STYLE:
- STREET
- OUTSIDE DIAMETER IMPERIAL:
- 1.378'
- UNITS:
- EACH
MSRP: $14.47Now: $13.02Was: $14.47 -
On Sale
KIBBLEWHITE Valve Seat 10-HC360
KIBBLEWHITE
MSRP: $14.47Now: $13.02Was: $14.47If you're running titanium valves in a high-performance engine, your valve seats need to match that precision—and OEM seats simply won't cut it. KIBBLEWHITE's copper-based HC360 seats deliver the...09263352- SKU:
- 09263352
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER IMPERIAL:
- 1.417'
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- INSIDE DIAMETER METRIC:
- 25.98 MM
- PRODUCT NAME:
- VALVE SEAT
MSRP: $14.47Now: $13.02Was: $14.47 -
On Sale
KIBBLEWHITE Valve Seat 10-HC370
KIBBLEWHITE
MSRP: $14.47Now: $13.02Was: $14.47If you're running titanium valves in a high-performance engine, your valve seats need to handle extreme thermal cycles and prevent accelerated wear. The KIBBLEWHITE 10-HC370 delivers the thermal...09263353- SKU:
- 09263353
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- INSIDE DIAMETER METRIC:
- 27.99 MM
- OUTSIDE DIAMETER IMPERIAL:
- 1.457'
- PRODUCT NAME:
- VALVE SEAT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $14.47Now: $13.02Was: $14.47 -
On Sale
KIBBLEWHITE Valve Seat 10-HC526
KIBBLEWHITE
MSRP: $14.47Now: $13.02Was: $14.47If you're running titanium valves in a high-performance engine, your valve seats need to keep pace with the demands of precision tolerances and extreme thermal cycles. KIBBLEWHITE's copper-based...09263364- SKU:
- 09263364
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- INSIDE DIAMETER IMPERIAL:
- 1.610'
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER IMPERIAL:
- 2.070'
- PRODUCT NAME:
- VALVE SEAT
MSRP: $14.47Now: $13.02Was: $14.47 -
On Sale
ANDREWS Cam Chain Drive Sprocket 288015
ANDREWS
MSRP: $122.95Now: $110.66Was: $122.95If you're running a high-revving engine or building a race-spec drivetrain, your stock cam chain drive sprocket is likely a limiting factor. The ANDREWS 288015 replaces that 34-tooth sprocket with a...DS199175- SKU:
- DS199175
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- PRODUCT NAME:
- SPROCKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- MATERIAL:
- 4340 STEEL
MSRP: $122.95Now: $110.66Was: $122.95 -
On Sale
ANDREWS Cam Set - Twin Cam 288121
ANDREWS
MSRP: $415.95Now: $374.36Was: $415.95The ANDREWS Cam Set 288121 delivers a noticeable torque increase across the 1700–5200 RPM band, making it an ideal upgrade for riders seeking stronger low-to-mid range pull without sacrificing...DS199176- SKU:
- DS199176
- Availability:
- Ships Same Business Day
- Weight:
- 3.19 LBS
- EXHAUST OPEN IMPERIAL:
- 41°
- GRIND:
- 21 SERIES
- INTAKE LIFT IMPERIAL:
- 0.498'
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.121'
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 106°
- INTAKE CLOSE IMPERIAL:
- 30°
- INTAKE DURATION IMPERIAL:
- 255°
- INTAKE OPEN IMPERIAL:
- 10°
- TYPE:
- CHAIN
- EXHAUST CLOSE IMPERIAL:
- 8°
- EXHAUST DURATION IMPERIAL:
- 264°
- EXHAUST LIFT IMPERIAL:
- 0.498'
- INTAKE LIFT AT TDC IMPERIAL:
- 0.134'
- INTAKE LOBE CENTERLINE IMPERIAL:
- 100°
- UNITS:
- PAIR
MSRP: $415.95Now: $374.36Was: $415.95 -
On Sale
ANDREWS Cam Set - Twin Cam 288126
ANDREWS
MSRP: $415.95Now: $374.36Was: $415.95If you're running a stock compression Twin Cam and want measurable torque gains without a complete engine rebuild, the ANDREWS 288126 cam set delivers real performance where it matters—in the...DS199179- SKU:
- DS199179
- Availability:
- Ships Same Business Day
- Weight:
- 3.18 LBS
- EXHAUST OPEN IMPERIAL:
- 41°
- GRIND:
- 26 SERIES
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- APPLICATION:
- EXHAUST
- EXHAUST LIFT IMPERIAL:
- 0.490'
- TYPE:
- CHAIN
- EXHAUST CLOSE IMPERIAL:
- 9°
- EXHAUST DURATION IMPERIAL:
- 266°
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.120'
- INTAKE CLOSE IMPERIAL:
- 35°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.138'
- INTAKE LOBE CENTERLINE IMPERIAL:
- 102°
- INTAKE OPEN IMPERIAL:
- 11°
- APPLICATION:
- INTAKE
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 106°
- INTAKE DURATION IMPERIAL:
- 226°
- INTAKE LIFT IMPERIAL:
- 0.490'
- PRODUCT NAME:
- CAM KIT
MSRP: $415.95Now: $374.36Was: $415.95 -
On Sale
ANDREWS Cam Set - Twin Cam 288137
ANDREWS
MSRP: $415.95Now: $374.36Was: $415.95The ANDREWS Cam Set 288137 delivers measurable torque gains across the RPM band without sacrificing compatibility with your existing engine setup. Whether you're running fuel injection or a...DS199180- SKU:
- DS199180
- Availability:
- Ships Same Business Day
- Weight:
- 3.18 LBS
- EXHAUST CLOSE IMPERIAL:
- 14°
- GRIND:
- 37 SERIES
- INTAKE CLOSE IMPERIAL:
- 38°
- INTAKE LOBE CENTERLINE IMPERIAL:
- 100°
- INTAKE OPEN IMPERIAL:
- 18°
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.148'
- EXHAUST LIFT IMPERIAL:
- 0.510'
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 106°
- EXHAUST OPEN IMPERIAL:
- 46°
- INTAKE LIFT AT TDC IMPERIAL:
- 0.174'
- TYPE:
- CHAIN
- EXHAUST DURATION IMPERIAL:
- 240°
- UNITS:
- PAIR
- APPLICATION:
- EXHAUST
- INTAKE DURATION IMPERIAL:
- 236°
- INTAKE LIFT IMPERIAL:
- 0.510'
MSRP: $415.95Now: $374.36Was: $415.95 -
On Sale
ANDREWS Cam Set - Twin Cam 288150
ANDREWS
MSRP: $415.95Now: $374.36Was: $415.95The ANDREWS Cam Set - Twin Cam 288150 delivers a measurable boost in low-end torque without sacrificing compatibility with your stock compression and valve train. This bolt-in cam performs across...DS199181- SKU:
- DS199181
- Availability:
- Ships Same Business Day
- Weight:
- 3.13 LBS
- EXHAUST CLOSE IMPERIAL:
- 18°
- GRIND:
- 50 SERIES
- INTAKE LIFT AT TDC IMPERIAL:
- 0.184'
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE
- EXHAUST DURATION IMPERIAL:
- 252°
- EXHAUST LIFT IMPERIAL:
- 0.510'
- EXHAUST LOBE CENTERLINE IMPERIAL:
- 108°
- INTAKE DURATION IMPERIAL:
- 248°
- INTAKE LOBE CENTERLINE IMPERIAL:
- 104°
- INTAKE OPEN IMPERIAL:
- 20°
- TYPE:
- CHAIN
- APPLICATION:
- EXHAUST
- EXHAUST LIFT AT TDC IMPERIAL:
- 0.168'
- EXHAUST OPEN IMPERIAL:
- 54°
- INTAKE LIFT IMPERIAL:
- 0.510'
- INTAKE CLOSE IMPERIAL:
- 48°
- UNITS:
- PAIR
MSRP: $415.95Now: $374.36Was: $415.95 -
ROUGH CRAFTS Chrome Rocker Box Cover - Grooved RC-610-001
ROUGH CRAFTS
$769.95A rocker box cover does more than protect—it's one of the first visual elements people notice on your M8 engine, and it needs to perform as hard as you do. The ROUGH CRAFTS Chrome Rocker Box Cover...09401957- SKU:
- 09401957
- Availability:
- Ships Same Business Day
- Weight:
- 5.71 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- STYLE:
- GROOVED
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- PAIR
$769.95 -
RSD Cam Cover - Clarity - Chrome - FLH 0177-2005-CH
RSD
$545.95The RSD Cam Cover – Clarity gives you a clean view of your engine's internal moving components while maintaining the structural integrity and aesthetic appeal of your air-cleaner assembly...09401128- SKU:
- 09401128
- Availability:
- Ships Same Business Day
- Weight:
- 3.11 LBS
- MODEL:
- CLARITY
- PRODUCT NAME:
- COVER
- TYPE:
- CAM
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- ALUMINUM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- BASE COLOR:
- SILVER
- COLOR/FINISH:
- CHROME
- STYLE:
- CHROME
$545.95
