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
-
K & N Oil Filter - Chrome - Evolution KN-170C
K & N
$19.99Synthetic racing oils demand a filter built to match their performance potential—and K&N's Evolution KN-170C delivers exactly that. With high-flow synthetic media and robust construction, this filter maintains optimal oil cleanliness under extreme...KN170C- SKU:
- KN170C
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- COLOR/FINISH:
- CHROME
- BASE FINISH:
- CHROME
- FEATURES:
- INCLUDES NUT
- UNITS:
- EACH
- BASE COLOR:
- SILVER
- LENGTH METRIC:
- 94 MM
- PRODUCT NAME:
- OIL FILTER
- FILTER MEDIA MATERIAL:
- SYNTHETIC
- RIDING STYLE:
- STREET
- STYLE:
- STANDARD
- TYPE:
- SPIN-ON
$19.99 -
Pro Filter 2002-2010 Buell XB12R Firebolt XB12S Lightning XB12X Ulysses Oil Filter PF-177
PRO FILTER
$11.99Keep your Buell's engine running clean and protected with the PRO FILTER PF-177, engineered to exceed OEM filtration standards and handle both synthetic and conventional oils without compromise. Factory filters often fall short of protecting...07120627- SKU:
- 07120627
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- PRODUCT NAME:
- OIL FILTER
- BASE COLOR:
- BLACK
- STYLE:
- PREMIUM
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$11.99 -
PRO-ONE PERF.MFG. Universal Oil Cooler Kit - Chrome 201050
PRO-ONE PERF.MFG.
$307.95Maintaining optimal oil temperatures is critical to engine longevity and consistent performance under load—whether you're on the track or pushing hard on the street. The PRO-ONE PERF.MFG. Universal Oil Cooler Kit delivers efficient heat dissipation with...DS310204- SKU:
- DS310204
- Availability:
- Ships Same Business Day
- Weight:
- 3.63 LBS
- COLOR/FINISH:
- CHROME
- FOR FRAME TUBE DIAMETER IMPERIAL:
- 1' - 1-1/4'
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- FOR FRAME TUBE DIAMETER METRIC:
- 25.4 MM - 31.8 MM
- OUTSIDE DIAMETER IMPERIAL:
- 2-1/4'
- FEATURES:
- WITHOUT GAUGE
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- LENGTH IMPERIAL:
- 12'
- LENGTH METRIC:
- 305 MM
- OUTSIDE DIAMETER METRIC:
- 57.2 MM
- PRODUCT NAME:
- OIL COOLER KIT
$307.95 -
PRO-ONE PERF.MFG. No Gauge Oil Cooler Kit - Black - 1"- 1-1/4" 201050B
PRO-ONE PERF.MFG.
$307.95Engine oil temperature is critical to performance and longevity—running too hot causes viscosity breakdown, increased wear, and power loss. The PRO-ONE No Gauge Oil Cooler Kit delivers efficient thermal management with a compact, bolt-on design that...07130073- SKU:
- 07130073
- Availability:
- Ships Same Business Day
- Weight:
- 3.90 LBS
- BASE COLOR:
- BLACK
- FEATURES:
- WITHOUT GAUGE
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- OIL COOLER KIT
- COLOR/FINISH:
- BLACK
- FOR FRAME TUBE DIAMETER METRIC:
- 25.4 MM - 31.8 MM
- LENGTH IMPERIAL:
- 12'
- LENGTH METRIC:
- 305 MM
- OUTSIDE DIAMETER METRIC:
- 57.2 MM
- FOR FRAME TUBE DIAMETER IMPERIAL:
- 1' - 1-1/4'
- OUTSIDE DIAMETER IMPERIAL:
- 2-1/4'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$307.95 -
PRO-ONE PERF.MFG. Oil Tank Mount Stud Cover 302190
PRO-ONE PERF.MFG.
$26.35Protect your Softail oil tank's rubber mounts from the elements while maintaining a show-quality appearance. This PRO-ONE stud cover keeps dirt, moisture, and debris away from critical mounting points, extending the life of your rubber isolators. The...07100165- SKU:
- 07100165
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- COVER
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- STYLE:
- SOFTAIL (SWING ARM)
- TYPE:
- OIL TANK MOUNT
- UNITS:
- PAIR
$26.35 -
PRO-ONE PERF.MFG. Slimline Oil Filter Mount - Chrome 203150
PRO-ONE PERF.MFG.
$98.95A quality oil filter mount keeps your cooling system organized and your engine protected—especially critical when space is tight or you're running a custom setup. The PRO-ONE PERF.MFG. Slimline delivers that reliability in a compact footprint, using...07120035- SKU:
- 07120035
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MODEL:
- SLIMLINE
- TYPE:
- OIL FILTER
- BASE FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- MOUNT
$98.95 -
ULTRACOOL Side Mount Oil Cooler Kit - Black - FLH SMT-2G
ULTRACOOL
$589.99Modern forced-induction and high-output engines generate heat that stock cooling systems simply can't handle—excess oil temperatures destroy viscosity, reduce lubrication efficiency, and accelerate engine wear. The ULTRACOOL Side Mount Oil Cooler Kit...07130204- SKU:
- 07130204
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 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 -
ULTRACOOL Side Mount Oil Cooler Kit - Gloss Black - Sportster SMSP-1G
ULTRACOOL
$549.99Harley Sportster riders know that sustained high-performance riding generates heat that can compromise oil viscosity and engine reliability. The ULTRACOOL Side Mount Oil Cooler Kit automatically manages oil temperatures with precision engineering,...07130224- SKU:
- 07130224
- Availability:
- Ships Same Business Day
- Weight:
- 6.51 LBS
- COLOR/FINISH:
- GLOSS BLACK
- PRODUCT NAME:
- OIL COOLER
- UNITS:
- KIT
- BASE COLOR:
- BLACK
- MOUNTING POSITION:
- DOWN TUBE
- MOUNTING POSITION:
- SIDE MOUNT
- RIDING STYLE:
- STREET
$549.99 -
ULTRACOOL Below Regulator Mount Oil Cooler - Stainless Steel RF-2CSS
ULTRACOOL
$549.99Engine oil temperature is critical to longevity and performance—especially in high-displacement S&S applications where heat management directly impacts reliability and power output. The ULTRACOOL Below Regulator Mount Oil Cooler keeps your T-series...07130246- SKU:
- 07130246
- Availability:
- Ships Same Business Day
- Weight:
- 7.86 LBS
- MOUNTING POSITION:
- BELOW REGULATOR
- PRODUCT NAME:
- OIL COOLER
- BASE COLOR:
- SILVER
- COLOR/FINISH:
- STAINLESS STEEL
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$549.99 -
ULTRACOOL Side Mount Oil Cooler - Chrome SMT-2CSS
ULTRACOOL
$589.99Engine oil temperature directly impacts performance, longevity, and reliability—especially under sustained load or high ambient conditions. The ULTRACOOL Side Mount Oil Cooler maintains optimal operating temperatures by dropping oil temps up to 50°F,...07130249- SKU:
- 07130249
- Availability:
- Ships Same Business Day
- Weight:
- 7.71 LBS
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- SIDE MOUNT
- PRODUCT NAME:
- OIL COOLER
- RIDING STYLE:
- STREET
- BASE COLOR:
- SILVER
- MATERIAL:
- STAINLESS STEEL
$589.99 -
ULTRACOOL Oil Cooler - Chrome - Indian IN-1C
ULTRACOOL
$589.99Excessive oil temperatures rob your Indian IN-1C of power, reliability, and engine longevity. The ULTRACOOL Oil Cooler delivers a purpose-built thermal management solution that automatically engages when oil reaches 210°F, dropping temperatures up to...07130251- SKU:
- 07130251
- Availability:
- Ships Same Business Day
- Weight:
- 7.36 LBS
- PRODUCT NAME:
- OIL COOLER
- UNITS:
- KIT
- BASE COLOR:
- SILVER
- MATERIAL:
- STAINLESS STEEL
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- SIDE MOUNT
- RIDING STYLE:
- STREET
$589.99 -
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
$549.99Qty in Cart: 0Quantity:Price:$549.99Subtotal: -
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
