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!
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- Price
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COVINGTONS Dipstick Cover - Diamondback - Black - Touring/Trike C3086-B
COVINGTONS
$64.95A quality dipstick cover does more than catch the eye—it protects your engine's fluid level indicator from dirt, moisture, and road debris while adding a polished aesthetic to your engine bay. The...07100278- SKU:
- 07100278
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$64.95 -
COVINGTONS Dipstick Cover - Diamondback - Chrome - Touring/Trike C3086-C
COVINGTONS
$64.95Your Touring or Trike deserves details that match its precision engineering. The COVINGTONS Dipstick Cover transforms a utilitarian component into a polished accent that catches light and complements...07100279- SKU:
- 07100279
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$64.95 -
S&S CYCLE Big Bore Piston Kit - 124" - +.010 - M8 920-0141
S&S CYCLE
$648.95If you're pushing your M8 Harley to 124 cubic inches, you need pistons engineered to handle the increased displacement and combustion pressures. The S&S Cycle Big Bore Piston Kit delivers OEM-quality...09110084- SKU:
- 09110084
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
$648.95 -
S&S CYCLE Big Bore Piston Kit - 128" - +.010 - M8 920-0142
S&S CYCLE
$636.95If you're pushing your M8 to 128 cubic inches, your factory pistons are holding you back. This S&S Cycle Big Bore Piston Kit delivers the strength and precision your build demands, with forged...09106522- SKU:
- 09106522
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
$636.95 -
S&S CYCLE Big Bore Piston Kit - 131" - +.010 - M8 920-0148
S&S CYCLE
$648.95If you're pushing your M8 to the limits, a big bore piston kit is essential for unlocking serious displacement gains without a complete engine overhaul. The S&S Cycle 131" big bore kit delivers the...09106523- SKU:
- 09106523
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$648.95 -
ULTRACOOL Side Mount Oil Cooler Kit - Naked Black - Sportster SMSP-2N
ULTRACOOL
$549.99Oil temperature management is critical to engine longevity and performance consistency, especially in high-demand riding conditions where stock cooling falls short. The ULTRACOOL Side Mount Oil...07130261- SKU:
- 07130261
- Availability:
- Ships Same Business Day
- Weight:
- 4.41 LBS
$549.99 -
ULTRACOOL Oil Cooler Kit - Chrome - Dyna DY-1CSS
ULTRACOOL
$549.99Engine oil temperature directly impacts power output, component longevity, and reliability—especially in high-displacement S&S engines where heat buildup accelerates wear and reduces performance. The...07130262- SKU:
- 07130262
- Availability:
- Ships Same Business Day
- Weight:
- 7.76 LBS
$549.99 -
ULTRACOOL Oil Cooler Kit - Gloss Black - Dyna DY-1GSS
ULTRACOOL
$549.99High oil temperatures degrade engine oil viscosity, increase wear on internal components, and reduce the longevity of your S&S engine. The ULTRACOOL Oil Cooler Kit maintains optimal operating...07130263- SKU:
- 07130263
- Availability:
- Ships Same Business Day
- Weight:
- 7.75 LBS
$549.99 -
ULTRACOOL Oil Cooler Kit - Flat Black - Dyna DY-1FSS
ULTRACOOL
$549.99Oil temperature management is critical for engine longevity and performance—especially in high-displacement S&S engines running under sustained load. The ULTRACOOL Oil Cooler Kit maintains optimal...07130264- SKU:
- 07130264
- Availability:
- Ships Same Business Day
- Weight:
- 7.75 LBS
$549.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Chrome - Touring SMT-1CSS
ULTRACOOL
$589.99High oil temperatures are the silent killer of engine performance and longevity. Whether you're pushing hard on the track or running consistently elevated engine loads, uncontrolled oil temps will...07130265- SKU:
- 07130265
- Availability:
- Ships Same Business Day
- Weight:
- 7.95 LBS
$589.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Gloss Black - Touring SMT-1GSS
ULTRACOOL
$589.99Sustained high performance demands precise thermal management—and oil temperature creep is one of the most overlooked threats to engine longevity and reliability. The ULTRACOOL Side Mount Oil Cooler...07130266- SKU:
- 07130266
- Availability:
- Ships Same Business Day
- Weight:
- 7.95 LBS
$589.99 -
ULTRACOOL Oil Cooler Kit - Naked Black - Touring/Trike SMT-4NSS
ULTRACOOL
$549.99Engine oil temperature control is critical to maintaining performance and longevity, especially under sustained racing conditions or hot-weather operation. The ULTRACOOL Oil Cooler Kit delivers...07130267- SKU:
- 07130267
- Availability:
- Ships Same Business Day
- Weight:
- 5.50 LBS
$549.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Naked - Black SMT8-5N
ULTRACOOL
$549.99If you're pushing your engine hard—whether on the track or the street—oil temperature control is non-negotiable. Excessive heat degrades oil viscosity, kills bearing protection, and shortens engine...07130260- SKU:
- 07130260
- Availability:
- Ships Same Business Day
- Weight:
- 3.51 LBS
$549.99 -
FIGURATI DESIGNS Timing Cover - 2 Hole - American Flag - Reversed - Stainless Steel FD20-TC-2H-SS
FIGURATI DESIGNS
$122.95A timing cover is one of the most visible components on your engine bay—and this one delivers both aesthetic appeal and genuine durability. Crafted from 316L stainless steel with a mirror or black...09402062- SKU:
- 09402062
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$122.95 -
FIGURATI DESIGNS Timing Cover - 2 Hole - Skull - Stainless Steel FD24-TC-2H-SS
FIGURATI DESIGNS
$122.95Your Harley's timing cover is the first thing people see—and it should reflect the quality of your machine. The FIGURATI DESIGNS Timing Cover combines corrosion-resistant 316L stainless steel with...09402064- SKU:
- 09402064
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$122.95 -
FIGURATI DESIGNS Timing Cover - 2 Hole - American Flag - Contrast Cut - Stainless Steel FD26R-TC-2H-SS
FIGURATI DESIGNS
$122.95A timing cover serves as both a protective barrier for your engine's internal components and a visible expression of your bike's aesthetic. This FIGURATI DESIGNS piece combines 316L stainless steel...09402066- SKU:
- 09402066
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$122.95 -
FIGURATI DESIGNS Timing Cover - 2 Hole - Skull - Contrast Cut - Stainless Steel FD27-TC-2H-SS
FIGURATI DESIGNS
$122.95A timing cover does more than protect your engine's critical internals—it's the first visual impression of your build's quality. The FIGURATI DESIGNS Timing Cover combines 316L stainless steel...09402068- SKU:
- 09402068
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$122.95 -
FIGURATI DESIGNS Timing Cover - 2 Hole - Don't Tread on Me - Stainless Steel FD40-TC-2H-SS
FIGURATI DESIGNS
$122.95A timing cover serves as both a functional barrier protecting your engine's critical timing components and a visible statement of your bike's aesthetic. The FIGURATI DESIGNS timing cover elevates...09402070- SKU:
- 09402070
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$122.95 -
FIGURATI DESIGNS Timing Cover - 2 Hole - Cross - Stainless Steel FD41-TC-2H-SS
FIGURATI DESIGNS
$122.95Your timing cover takes a beating from engine heat, debris, and constant vibration—protect your investment with a timing cover engineered for durability and finished to complement your build. The...09402072- SKU:
- 09402072
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$122.95 -
FIGURATI DESIGNS Timing Cover - 2 Hole - POW MIA - Stainless Steel FD50-TC-2H-SS
FIGURATI DESIGNS
$122.95A timing cover does more than protect your engine's internals—it's the first visual statement of your build's quality and attention to detail. The FIGURATI DESIGNS timing cover combines 316L...09402074- SKU:
- 09402074
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$122.95
