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
-
ULTRACOOL Side Mount Oil Cooler Kit - Chrome - FLH SMT-2C
ULTRACOOL
$589.99Engine oil temperature is one of the most critical variables in high-performance riding—exceed safe operating ranges and you risk viscosity breakdown, bearing wear, and catastrophic failure. The ULTRACOOL Side Mount Oil Cooler Kit delivers precision...07130203- SKU:
- 07130203
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- PRODUCT NAME:
- OIL COOLER
$589.99 -
ULTRACOOL Oil Cooler Kit - Black RF-2G
ULTRACOOL
$549.99Engine oil temperature directly impacts lubrication efficiency and component longevity—allowing oil to exceed 210°F accelerates degradation and increases wear on critical bearings and journals. The ULTRACOOL RF-2G automatically manages thermal loads with...07130150- SKU:
- 07130150
- Availability:
- Ships Same Business Day
- Weight:
- 7.75 LBS
- BASE COLOR:
- BLACK
- MOUNTING POSITION:
- BELOW REGULATOR
- COLOR/FINISH:
- GLOSS BLACK
- PRODUCT NAME:
- OIL COOLER
- MOUNTING POSITION:
- CENTER MOUNT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$549.99 -
ULTRACOOL Oil Cooler Kit - Flat Black RF-2F
ULTRACOOL
$549.99Engine oil temperature directly impacts performance and longevity—allow your oil to exceed 210°F and you're risking viscosity breakdown, reduced film strength, and accelerated wear on critical components. The ULTRACOOL Oil Cooler Kit RF-2F automatically...07130151- SKU:
- 07130151
- Availability:
- Ships Same Business Day
- Weight:
- 7.66 LBS
- MOUNTING POSITION:
- CENTER MOUNT
- UNITS:
- KIT
- PRODUCT NAME:
- OIL COOLER
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
- BASE FINISH:
- FLAT
- COLOR/FINISH:
- FLAT BLACK
- MOUNTING POSITION:
- BELOW REGULATOR
$549.99 -
ULTRACOOL Oil Cooler Kit - Chrome DY-1SS
ULTRACOOL
$549.99Track days and sustained high-performance driving generate heat that standard cooling systems can't manage alone. The ULTRACOOL Oil Cooler Kit maintains optimal oil temperatures under load, preserving engine protection and extending component life. This...07130152- SKU:
- 07130152
- Availability:
- Ships Same Business Day
- Weight:
- 7.05 LBS
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- MOUNTING POSITION:
- CENTER MOUNT
- BASE FINISH:
- NATURAL
- PRODUCT NAME:
- OIL COOLER
- MOUNTING POSITION:
- BELOW REGULATOR
$549.99 -
ULTRACOOL Oil Cooler Kit - Black DY-1G
ULTRACOOL
$549.99Sustained high oil temperatures rob your engine of reliability and performance—heat accelerates viscosity breakdown and increases wear on critical components. The ULTRACOOL Oil Cooler Kit maintains optimal oil temperature through intelligent thermal...07130153- SKU:
- 07130153
- Availability:
- Ships Same Business Day
- Weight:
- 7.16 LBS
- BASE COLOR:
- BLACK
- MOUNTING POSITION:
- BELOW REGULATOR
- MOUNTING POSITION:
- CENTER MOUNT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- GLOSS BLACK
- PRODUCT NAME:
- OIL COOLER
- UNITS:
- KIT
$549.99 -
ULTRACOOL Oil Cooler Kit - Flat Black DY-1F
ULTRACOOL
$499.00Track days and street driving demand reliable engine thermal management—especially under sustained high RPM operation where stock cooling systems fall short. The ULTRACOOL Oil Cooler Kit delivers factory-quality heat rejection with a purpose-built...07130154- SKU:
- 07130154
- Availability:
- Ships Same Business Day
- Weight:
- 7.20 LBS
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
- BASE FINISH:
- FLAT
- COLOR/FINISH:
- FLAT BLACK
- MOUNTING POSITION:
- CENTER MOUNT
- MOUNTING POSITION:
- BELOW REGULATOR
- UNITS:
- KIT
- PRODUCT NAME:
- OIL COOLER
$499.00Qty in Cart: 0Quantity:Price:$499.00Subtotal: -
ULTRACOOL Side Mount Oil Cooler Kit - Chrome - FLH SMT-1C
ULTRACOOL
$589.99Extended oil temperatures are a silent killer of engine reliability and performance—especially under sustained track conditions or aggressive riding. The ULTRACOOL Side Mount Oil Cooler Kit automatically manages thermal load by engaging dual 220 CFM fans...07130157- SKU:
- 07130157
- Availability:
- Ships Same Business Day
- Weight:
- 7.55 LBS
- BASE FINISH:
- NATURAL
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- OIL COOLER
$589.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Black - FLH SMT-1G
ULTRACOOL
$589.99Engine oil temperature is one of the most critical factors affecting engine longevity and performance under load. The ULTRACOOL Side Mount Oil Cooler Kit maintains optimal oil viscosity and protection during sustained high-RPM operation, preventing...07130158- SKU:
- 07130158
- Availability:
- Ships Same Business Day
- Weight:
- 7.55 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- GLOSS BLACK
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- PRODUCT NAME:
- OIL COOLER
- BASE COLOR:
- BLACK
$589.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Chrome - Dyna SMD-1C
ULTRACOOL
$589.99Excessive oil temperatures kill engine efficiency and accelerate wear on critical components—especially in high-performance Dyna applications. The ULTRACOOL Side Mount Oil Cooler Kit automatically manages thermal loads with a dedicated cooling system...07130161- SKU:
- 07130161
- Availability:
- Ships Same Business Day
- Weight:
- 7.65 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- PRODUCT NAME:
- OIL COOLER
$589.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Black - Dyna SMD-1G
ULTRACOOL
$589.99Excessive oil temperatures rob your engine of reliability and performance—especially during sustained high-RPM riding or track days. The ULTRACOOL Side Mount Oil Cooler Kit maintains optimal oil viscosity and heat management through a purpose-built...07130162- SKU:
- 07130162
- Availability:
- Ships Same Business Day
- Weight:
- 7.66 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- COLOR/FINISH:
- GLOSS BLACK
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- PRODUCT NAME:
- OIL COOLER
- BASE COLOR:
- BLACK
$589.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Chrome - Softail SMS-1C
ULTRACOOL
$589.99High oil temperatures are the silent killer of engine longevity and performance—especially in demanding riding conditions. The ULTRACOOL Side Mount Oil Cooler Kit automatically manages thermal load by engaging dual fans at 210°F, keeping your Softail's...07130163- SKU:
- 07130163
- Availability:
- Ships Same Business Day
- Weight:
- 7.46 LBS
- BASE FINISH:
- NATURAL
- MOUNTING POSITION:
- SIDE MOUNT
- PRODUCT NAME:
- OIL COOLER
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- DOWN TUBE
- RIDING STYLE:
- STREET
$589.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Gloss Black - Softail SMS-1G
ULTRACOOL
$589.99Harley Softail riders know that sustained high-performance riding generates heat that standard cooling systems simply can't manage. The ULTRACOOL Side Mount Oil Cooler Kit keeps your oil within the optimal operating window, protecting engine longevity...07130164- SKU:
- 07130164
- Availability:
- Ships Same Business Day
- Weight:
- 7.50 LBS
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BASE COLOR:
- BLACK
- COLOR/FINISH:
- GLOSS BLACK
- PRODUCT NAME:
- OIL COOLER
$589.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Chrome - Sportster SMSP-2C
ULTRACOOL
$589.99Oil temperature is one of the most critical factors in engine longevity and performance—especially under sustained racing conditions or hot-weather riding. The ULTRACOOL Side Mount Oil Cooler Kit automatically manages thermal load by activating dual fans...07130165- SKU:
- 07130165
- Availability:
- Ships Same Business Day
- Weight:
- 6.50 LBS
- PRODUCT NAME:
- OIL COOLER
- UNITS:
- KIT
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- RIDING STYLE:
- STREET
$589.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Gloss Black - Sportster SMSP-2G
ULTRACOOL
$589.99High oil temperatures degrade engine performance and shorten component lifespan—the ULTRACOOL Side Mount Oil Cooler Kit maintains optimal thermal management, keeping your Sportster running at peak efficiency under sustained riding or racing conditions...07130166- SKU:
- 07130166
- Availability:
- Ships Same Business Day
- Weight:
- 6.60 LBS
- COLOR/FINISH:
- GLOSS BLACK
- PRODUCT NAME:
- OIL COOLER
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BASE COLOR:
- BLACK
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
$589.99 -
ULTRACOOL Frame Mount Oil Cooler Kit - Chrome - M8 SMT8-1C
ULTRACOOL
$589.99Engine oil temperature directly impacts performance, lubrication efficiency, and component longevity—especially under sustained track conditions or high-output forced induction applications. The ULTRACOOL Frame Mount Oil Cooler Kit automatically manages...07130167- SKU:
- 07130167
- Availability:
- Ships Same Business Day
- Weight:
- 6.65 LBS
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- PRODUCT NAME:
- OIL COOLER
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$589.99Qty in Cart: 0Quantity:Price:$589.99Subtotal: -
ULTRACOOL Frame Mount Oil Cooler Kit - Black - M8 SMT8-1G
ULTRACOOL
$589.99Engine oil temperature is one of the most critical variables in high-performance driving—excessive heat degrades lubricant viscosity, reduces film strength, and accelerates wear on internal components. The ULTRACOOL Frame Mount Oil Cooler Kit...07130168- SKU:
- 07130168
- Availability:
- Ships Same Business Day
- Weight:
- 6.65 LBS
- UNITS:
- KIT
- COLOR/FINISH:
- GLOSS BLACK
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- PRODUCT NAME:
- OIL COOLER
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
$589.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Chrome - M8 SMS8-1C
ULTRACOOL
$589.99High oil temperatures degrade engine lubrication, reduce viscosity, and accelerate bearing wear—especially under sustained racing or aggressive riding conditions. The ULTRACOOL Side Mount Oil Cooler Kit maintains optimal oil temperature through...07130171- SKU:
- 07130171
- Availability:
- Ships Same Business Day
- Weight:
- 6.75 LBS
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BASE FINISH:
- NATURAL
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- PRODUCT NAME:
- OIL COOLER
$589.99 -
ULTRACOOL Side Mount Oil Cooler Kit - Black - M8 SMS8-1G
ULTRACOOL
$589.99Modern high-performance engines generate extreme heat under sustained load, and inadequate oil cooling directly compromises engine longevity and peak power output. The ULTRACOOL Side Mount Oil Cooler Kit delivers active thermal management with automatic...07130172- SKU:
- 07130172
- Availability:
- Ships Same Business Day
- Weight:
- 6.75 LBS
- BASE COLOR:
- BLACK
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- GLOSS BLACK
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- PRODUCT NAME:
- OIL COOLER
- UNITS:
- KIT
$589.99 -
COLONY Pushrod Covers - XL 2140-40
COLONY
$155.95Adjustable pushrods demand precision protection from debris, heat, and contamination—and these COLONY pushrod covers deliver exactly that. The XL 2140-40 kit keeps your valve train clean and operating at peak efficiency, whether you're tuning on the dyno...DS193829- SKU:
- DS193829
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- UNITS:
- KIT
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CONVERSION KIT
- TYPE:
- PUSHROD COVER
$155.95 -
COLONY Oil Vent Fitting Chrome Big Twin 7148-3
COLONY
$17.95Oil line integrity is non-negotiable on high-performance Big Twin engines, where vibration and heat cycling can compromise factory fittings over time. The COLONY Oil Vent Fitting delivers OEM-equivalent construction with a chrome finish that resists...DS193814- SKU:
- DS193814
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- STEEL
- PRODUCT NAME:
- FITTING
- RIDING STYLE:
- STREET
- TYPE:
- OIL LINE
- BASE FINISH:
- CHROME
- UNITS:
- 3 PACK
$17.95
