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
S&S CYCLE HVHP Oil Pump with Gears 31-6307
S&S CYCLE
MSRP: $715.95Now: $658.67Was: $715.95High-output engines demand more oil volume than stock pumps can reliably deliver—especially on the return side where inadequate scavenging leads to crankcase pressure, breather blow-by, and potential...09320188- SKU:
- 09320188
- Availability:
- Ships Same Business Day
- Weight:
- 3.71 LBS
- PRODUCT NAME:
- PUMP
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- OIL
MSRP: $715.95Now: $658.67Was: $715.95 -
On Sale
S&S CYCLE Oil Pump - Universal 31-6205
S&S CYCLE
MSRP: $445.95Now: $410.27Was: $445.95Whether you're building a custom engine or upgrading an existing setup, the S&S Cycle Oil Pump 31-6205 delivers reliable lubrication with the flexibility your project demands. This universal kit...09320133- SKU:
- 09320133
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- PRODUCT NAME:
- PUMP
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- UNITS:
- KIT
MSRP: $445.95Now: $410.27Was: $445.95 -
On Sale
S&S CYCLE Oil Pump Rebuild Kit 31-6275
S&S CYCLE
MSRP: $31.95Now: $29.39Was: $31.95Maintaining peak oil pump performance is critical to engine reliability and longevity, especially in high-demand racing applications. This master rebuild kit from S&S Cycle gives you OEM-quality...09320149- SKU:
- 09320149
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- OIL PUMP
- UNITS:
- KIT
- RIDING STYLE:
- STREET
MSRP: $31.95Now: $29.39Was: $31.95 -
On Sale
S&S CYCLE Oil Pump with Gears - Big Twin 31-6295
S&S CYCLE
MSRP: $715.95Now: $658.67Was: $715.95If you're running a Big Twin engine, oil circulation is non-negotiable—inadequate flow leads to bearing wear, overheating, and catastrophic failure. The S&S Cycle oil pump delivers consistent...09320150- SKU:
- 09320150
- Availability:
- Ships Same Business Day
- Weight:
- 3.71 LBS
- FLOW RATE:
- STANDARD
- PRODUCT NAME:
- PUMP
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- OIL
MSRP: $715.95Now: $658.67Was: $715.95 -
On Sale
S&S CYCLE Oil Pump Check Valve Spring - 10 Pack 31-6092
S&S CYCLE
MSRP: $9.95Now: $9.15Was: $9.95A failing oil pump check valve spring can compromise lubrication pressure and engine reliability—especially critical in high-rpm or performance applications where oil delivery consistency is...09320206- SKU:
- 09320206
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- OIL PUMP
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPRING
MSRP: $9.95Now: $9.15Was: $9.95 -
On Sale
S&S CYCLE Oil Pump Screen - Twin Cam 310-0546
S&S CYCLE
MSRP: $15.95Now: $14.67Was: $15.95A clogged or worn oil pump screen directly compromises engine lubrication efficiency, risking bearing wear and catastrophic engine failure. The S&S Cycle Oil Pump Screen (310-0546) is an OEM...09320209- SKU:
- 09320209
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- TYPE:
- OIL PUMP
- UNITS:
- EACH
- PRODUCT NAME:
- SCREEN
- RIDING STYLE:
- STREET
MSRP: $15.95Now: $14.67Was: $15.95 -
On Sale
S&S CYCLE Gear Breather - Standard 33-4246
S&S CYCLE
MSRP: $144.95Now: $133.35Was: $144.95Stock breather systems restrict crankcase evacuation, leading to pressure buildup that compromises seal integrity and reduces engine reliability. The S&S CYCLE Gear Breather eliminates this...09320126- SKU:
- 09320126
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- UNITS:
- EACH
- TYPE:
- BREATHER
- PRODUCT NAME:
- GEAR
- RIDING STYLE:
- STREET
MSRP: $144.95Now: $133.35Was: $144.95 -
On Sale
S&S CYCLE Breather Gear Shims - Big Twin 33-4249
S&S CYCLE
MSRP: $49.95Now: $45.95Was: $49.95Proper breather gear clearance is critical for maintaining consistent valve timing and preventing catastrophic internal damage on Big Twin engines. This S&S Cycle shim kit gives you precision-fit...09320128- SKU:
- 09320128
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SHIM
- TYPE:
- BREATHER GEAR
- RIDING STYLE:
- STREET
- UNITS:
- KIT
MSRP: $49.95Now: $45.95Was: $49.95 -
On Sale
S&S CYCLE Top Mount - T143 900-0797
S&S CYCLE
MSRP: $71.95Now: $66.19Was: $71.95The S&S Cycle T143 Top Mount delivers the compression ratio and displacement you need to extract maximum power from your engine without costly frame modifications. Built with CNC-machined B3 cylinder...09330115- SKU:
- 09330115
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BASE FINISH:
- ZINC
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- ENGINE MOUNT
- COLOR/FINISH:
- ZINC
- MOUNTING POSITION:
- TOP
- PRODUCT NAME:
- BRACKET
MSRP: $71.95Now: $66.19Was: $71.95 -
On Sale
S&S CYCLE Cylinders - 4.25" - M8 - Black Highlighted Fins 910-0682
S&S CYCLE
MSRP: $970.95Now: $893.27Was: $970.95A larger displacement is the most direct path to increased horsepower and torque on your M8 engine. These S&S Cycle cylinders deliver the cubic inches you need without sacrificing reliability or...09310838- SKU:
- 09310838
- Availability:
- Ships Same Business Day
- Weight:
- 26.61 LBS
- BORE SIZE IMPERIAL:
- 4.250'
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- HIGHLIGHTED FINS
- COLOR/FINISH:
- WRINKLE BLACK
- PRODUCT NAME:
- CYLINDER
- STYLE:
- BIG BORE
- UNITS:
- PAIR
MSRP: $970.95Now: $893.27Was: $970.95Qty in Cart: 0Quantity:Price:MSRP: $970.95Now: $893.27Was: $970.95Subtotal: -
On Sale
S&S CYCLE Cylinders with Pistons - Black 910-0324
S&S CYCLE
MSRP: $1,643.95Now: $1,512.43Was: $1,643.95If you're building a high-displacement Harley big twin with serious compression and real-world reliability, this S&S Cycle cylinder and piston kit delivers the precision engineering you need to make...09310686- SKU:
- 09310686
- Availability:
- Ships Same Business Day
- Weight:
- 24.90 LBS
- PRODUCT NAME:
- BIG BORE CYLINDER KIT
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
- COLOR/FINISH:
- WRINKLE BLACK
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.125'
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- POWDER-COATED
- STROKE LENGTH IMPERIAL:
- 4.625'
- DISPLACEMENT:
- 124'
MSRP: $1,643.95Now: $1,512.43Was: $1,643.95 -
On Sale
S&S CYCLE Cylinders and Pistons - 84" Stroker 91-9017
S&S CYCLE
MSRP: $1,995.95Now: $1,836.27Was: $1,995.95Building a stroker engine demands precision-matched components that work together seamlessly—and that's exactly what this S&S CYCLE cylinder and piston kit delivers. Whether you're constructing an...09310689- SKU:
- 09310689
- Availability:
- Ships Same Business Day
- Weight:
- 35.44 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.4:1
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- STOCK BORE CYLINDER
- BORE SIZE IMPERIAL:
- 3.4375'
- DISPLACEMENT:
- 88'
- UNITS:
- KIT
- DISPLACEMENT:
- 84'
- DISPLACEMENT:
- 86'
- MATERIAL:
- CAST IRON
- COLOR/FINISH:
- GLOSS BLACK
MSRP: $1,995.95Now: $1,836.27Was: $1,995.95Qty in Cart: 0Quantity:Price:MSRP: $1,995.95Now: $1,836.27Was: $1,995.95Subtotal: -
On Sale
S&S CYCLE Big Bore Cylinder and Stroker Piston Kit 91-9001
S&S CYCLE
MSRP: $1,995.95Now: $1,836.27Was: $1,995.95Building or rebuilding a big-bore Harley engine demands precision components that can handle sustained high RPM and boost. This S&S Cycle kit delivers the bore and stroke combination you need to...09310690- SKU:
- 09310690
- Availability:
- Ships Same Business Day
- Weight:
- 32.30 LBS
- DISPLACEMENT:
- 88'
- MATERIAL:
- IRON
- STROKE LENGTH IMPERIAL:
- 4.250'
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- COLOR/FINISH:
- GLOSS BLACK
- COMPRESSION RATIO IMPERIAL:
- 7.5:1
- STYLE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- CAST
- RIDING STYLE:
- STREET
MSRP: $1,995.95Now: $1,836.27Was: $1,995.95 -
On Sale
S&S CYCLE Cylinder Kit - 100" - Silver 910-0642
S&S CYCLE
MSRP: $1,540.95Now: $1,417.67Was: $1,540.95Looking to unlock serious displacement and power without pulling your engine? The S&S Cycle 100" Cylinder Kit transforms your 88" big twin into a potent, streetable powerhouse—all with the engine...09310739- SKU:
- 09310739
- Availability:
- Ships Same Business Day
- Weight:
- 26.01 LBS
- BORE SIZE IMPERIAL:
- 4.000'
- DISPLACEMENT:
- 100'
- COLOR/FINISH:
- SILVER
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- RIDING STYLE:
- STREET
- MODEL:
- SIDEWINDER
- STROKE LENGTH IMPERIAL:
- 4'
- TYPE:
- BIG BORE
- UNITS:
- KIT
MSRP: $1,540.95Now: $1,417.67Was: $1,540.95 -
On Sale
S&S CYCLE Cylinder Kit - 110" - Silver 910-0650
S&S CYCLE
MSRP: $1,540.95Now: $1,417.67Was: $1,540.95If you're running an 88", 96", or 103" big twin and want genuine displacement gains without tearing down your entire engine, the S&S 110" Cylinder Kit delivers real power where it counts. This...09310741- SKU:
- 09310741
- Availability:
- Ships Same Business Day
- Weight:
- 25.51 LBS
- MODEL:
- SIDEWINDER
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COLOR/FINISH:
- SILVER
- DISPLACEMENT:
- 110'
- TYPE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.000'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- RIDING STYLE:
- STREET
MSRP: $1,540.95Now: $1,417.67Was: $1,540.95 -
On Sale
S&S CYCLE Cylinder - Standard - 131" - Black - M8 910-0763
S&S CYCLE
MSRP: $1,509.95Now: $1,389.15Was: $1,509.95If you're serious about extracting maximum displacement from your M8, this S&S Cycle 131" cylinder is the foundation of a legitimate power increase. The engineered geometry delivers substantial...09311011- SKU:
- 09311011
- Availability:
- Ships Same Business Day
- Weight:
- 28.91 LBS
- COLOR/FINISH:
- NON-HIGHLIGHTED FINS
- TYPE:
- STROKER
- COLOR/FINISH:
- WRINKLE BLACK
- DISPLACEMENT:
- 131'
- PRODUCT NAME:
- CYLINDER AND PISTON KIT
- UNITS:
- KIT
- COLOR/FINISH:
- POWDER-COATED
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- BORE SIZE IMPERIAL:
- 4.250'
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- STYLE:
- BIG BORE
MSRP: $1,509.95Now: $1,389.15Was: $1,509.95Qty in Cart: 0Quantity:Price:MSRP: $1,509.95Now: $1,389.15Was: $1,509.95Subtotal: -
On Sale
S&S CYCLE Gasket Set - 3.625" - V2 Big Twin 90-1906
S&S CYCLE
MSRP: $67.95Now: $62.51Was: $67.95Maintaining proper sealing integrity is critical to engine reliability and performance longevity. This OEM-quality gasket set from S&S Cycle ensures leak-free operation across all critical sealing...09340326- SKU:
- 09340326
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
- RIDING STYLE:
- STREET
- UNITS:
- SET
- TYPE:
- EXHAUST
- BORE SIZE IMPERIAL:
- 3.625'
- TYPE:
- CYLINDER BASE
- TYPE:
- CYLINDER HEAD
- BORE SIZE:
- 3,625'
- PRODUCT NAME:
- GASKET
MSRP: $67.95Now: $62.51Was: $67.95 -
On Sale
S&S CYCLE Top End Gasket Kit - 4-1/8" 90-9510
S&S CYCLE
MSRP: $181.95Now: $167.39Was: $181.95A top-end gasket kit is essential maintenance for any big-inch Harley-Davidson engine—it seals critical combustion chamber surfaces and prevents oil weeping that compromises performance and...09340653- SKU:
- 09340653
- Availability:
- Ships Same Business Day
- Weight:
- 0.33 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 4.125'
- UNITS:
- KIT
- FEATURES:
- STOCK BOLT PATTERN
- PRODUCT NAME:
- GASKET KIT
MSRP: $181.95Now: $167.39Was: $181.95 -
On Sale
S&S CYCLE Base/Head Gaskets - Big Bore - Big Twin 90-1918
S&S CYCLE
MSRP: $102.95Now: $94.71Was: $102.95Big Twin engines demand gaskets that won't fail under sustained high-combustion pressures—and stock gaskets simply aren't engineered for the abuse. S&S Cycle's Big Bore gaskets combine aramid fiber...09342106- SKU:
- 09342106
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
- BORE SIZE IMPERIAL:
- 3.625'
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 0.81 MM
- BORE SIZE:
- 3,625'
- TYPE:
- CYLINDER BASE
- UNITS:
- KIT
MSRP: $102.95Now: $94.71Was: $102.95 -
On Sale
S&S CYCLE Top End Gasket - 4.125" 90-1914
S&S CYCLE
MSRP: $147.95Now: $136.11Was: $147.95A quality top-end gasket set is critical for maintaining compression, preventing coolant and oil seepage, and ensuring consistent performance across engine cycles. The S&S CYCLE 4.125" gasket kit...09344753- SKU:
- 09344753
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE SIZE IMPERIAL:
- 4.125'
- BORE SIZE:
- 4,125'
- MATERIAL:
- LAYERED STEEL
- TYPE:
- CYLINDER BASE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
MSRP: $147.95Now: $136.11Was: $147.95Qty in Cart: 0Quantity:Price:MSRP: $147.95Now: $136.11Was: $147.95Subtotal:
