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
-
DRAG SPECIALTIES Piston - XL 750768-BX-LB1
DRAG SPECIALTIES
$132.45If you're rebuilding an engine or replacing worn pistons, you need components that deliver OEM-level reliability without the premium price tag. The DRAG SPECIALTIES XL 750768-BX-LB1 pistons combine...DS750768- SKU:
- DS750768
- Availability:
- Ships Same Business Day
- Weight:
- 2.94 LBS
- BORE - OVERSIZE:
- +0,010'
- BORE SIZE IMPERIAL:
- 3.508'
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PISTON DIAMETER IMPERIAL:
- 3.508'
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- UNITS:
- KIT
$132.45 -
ACCUTRONIX Oil Filter Mount - Chrome RM2141-C
ACCUTRONIX
$138.95A proper oil filter mounting solution is critical for maintaining clean oil flow and system reliability in high-performance applications. The ACCUTRONIX Oil Filter Mount eliminates improvised setups...DS190781- SKU:
- DS190781
- Availability:
- Ships Same Business Day
- Weight:
- 1.22 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- MOUNT
- BASE FINISH:
- CHROME
- UNITS:
- KIT
- TYPE:
- OIL FILTER
$138.95 -
GARDNER-WESTCOTT Turn Signal Lens Bolt Kit P-61-13
GARDNER-WESTCOTT
$22.95Proper fastening is critical when securing turn signal lenses—loose bolts lead to vibration, water ingress, and lens failure on the track or street. The Gardner-Westcott P-61-13 kit delivers...DS190127- SKU:
- DS190127
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- BOLT KIT
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- TURN SIGNAL LENS
$22.95Qty in Cart: 0Quantity:Price:$22.95Subtotal: -
GARDNER-WESTCOTT Polished Swing Arm Bolts - 7/16"-20 P-80-40
GARDNER-WESTCOTT
$19.95Swing arm bolts endure constant stress from suspension articulation and cornering loads, making quality fasteners essential for safety and reliability. The GARDNER-WESTCOTT P-80-40 delivers the...DS190123- SKU:
- DS190123
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- BASE FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 7/16-14
- PRODUCT NAME:
- BOLT KIT
- RIDING STYLE:
- STREET
- TYPE:
- SWINGARM
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE:
- 7/16-14
- LENGTH:
- 1-1/4'
- LENGTH IMPERIAL:
- 1-1/4'
$19.95 -
GARDNER-WESTCOTT Polished Swing Arm Bolts - 7/16"-14 P-80-79
GARDNER-WESTCOTT
$28.95Swing arm bolts endure constant stress from suspension articulation and cornering loads—undersized or corroded fasteners will compromise handling precision and create safety risks. GARDNER-WESTCOTT's...DS190121- SKU:
- DS190121
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BOLT KIT
- UNITS:
- KIT
- DIAMETER - THREAD SIZE:
- 7/16-20
- COLOR/FINISH:
- CHROME
- LENGTH:
- 1-1/4'
- DIAMETER - THREAD SIZE IMPERIAL:
- 7/16-20
- LENGTH IMPERIAL:
- 1-1/4'
- RIDING STYLE:
- STREET
- TYPE:
- SWINGARM
$28.95Qty in Cart: 0Quantity:Price:$28.95Subtotal: -
On Sale
COLONY Cylinder Stud Set 8858-8
COLONY
MSRP: $37.95Now: $34.16Was: $37.95Cylinder studs are critical fastening points that withstand extreme combustion pressures and thermal cycling. Factory originals can stretch and fail under high-boost or nitrous applications, leading...DS189954- SKU:
- DS189954
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- TYPE:
- CYLINDER
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- STUD SET
- RIDING STYLE:
- STREET
- UNITS:
- 8 PACK
MSRP: $37.95Now: $34.16Was: $37.95 -
On Sale
COLONY Cylinder Stud Set 9424-8
COLONY
MSRP: $101.95Now: $91.76Was: $101.95Cylinder studs are critical fastening components that secure your cylinder head under extreme pressure and temperature cycling. Factory studs can stretch, fail, or lose clamp load over...DS189953- SKU:
- DS189953
- Availability:
- Ships Same Business Day
- Weight:
- 1.44 LBS
- PRODUCT NAME:
- STUD SET
- RIDING STYLE:
- STREET
- UNITS:
- 8 PACK
- TYPE:
- CYLINDER
MSRP: $101.95Now: $91.76Was: $101.95 -
On Sale
COLONY Cylinder Stud Set 9507-8
COLONY
MSRP: $88.95Now: $80.06Was: $88.95Cylinder studs are critical fasteners that withstand extreme pressure and thermal cycling in high-performance engines. Weak or stock studs can stretch, fail, or cause catastrophic engine damage...DS189952- SKU:
- DS189952
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER
- UNITS:
- 8 PACK
- PRODUCT NAME:
- STUD SET
MSRP: $88.95Now: $80.06Was: $88.95 -
On Sale
COLONY Hydraulic Pushrods - Big Twin 7515-4
COLONY
MSRP: $74.95Now: $67.46Was: $74.95COLONY Hydraulic Pushrods deliver the precision valve actuation your Big Twin demands, with aerospace-grade materials engineered to withstand extreme RPM and heat cycles. Stock pushrods flex and wear...DS189849- SKU:
- DS189849
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PUSHROD SET
- RIDING STYLE:
- STREET
- STYLE:
- FIXED LENGTH
- UNITS:
- SET OF 4
MSRP: $74.95Now: $67.46Was: $74.95 -
On Sale
COLONY Hydraulic Pushrods - Big Twin 7516-4
COLONY
MSRP: $74.95Now: $67.46Was: $74.95COLONY Hydraulic Pushrods are engineered for Big Twin engines that demand reliable valve actuation under high RPM and sustained load. Aircraft-grade aluminum construction keeps reciprocating weight...DS189848- SKU:
- DS189848
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PUSHROD SET
- RIDING STYLE:
- STREET
- UNITS:
- SET OF 4
- STYLE:
- HYDRAULIC
MSRP: $74.95Now: $67.46Was: $74.95 -
On Sale
COLONY Pushrod Kit - 74" - Big Twin 7122-4
COLONY
MSRP: $57.95Now: $52.16Was: $57.95Pushrods are critical valve train components that must maintain precise tolerances under extreme heat and RPM conditions. The COLONY Pushrod Kit delivers aircraft-grade construction with heat-treated...DS189847- SKU:
- DS189847
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PRODUCT NAME:
- PUSHROD SET
- RIDING STYLE:
- STREET
- STYLE:
- FIXED LENGTH
- MATERIAL:
- ALUMINUM
- UNITS:
- SET OF 4
MSRP: $57.95Now: $52.16Was: $57.95 -
On Sale
COLONY Pushrod Kit - XL 7123-4
COLONY
MSRP: $57.95Now: $52.16Was: $57.95Stock pushrods are often the first weak link in a high-rpm engine, flexing under load and throwing off valve timing at critical moments. The COLONY Pushrod Kit XL 7123-4 replaces that liability with...DS189846- SKU:
- DS189846
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PUSHROD SET
- RIDING STYLE:
- STREET
- STYLE:
- FIXED LENGTH
- UNITS:
- SET OF 4
MSRP: $57.95Now: $52.16Was: $57.95 -
On Sale
COLONY Tappet Adjuster Locknuts 8780-4
COLONY
MSRP: $12.95Now: $11.66Was: $12.95Valve train stability depends on precision fastening, and loose or corroded tappet locknuts compromise both performance and reliability. COLONY's split locknuts are engineered to maintain consistent...DS189844- SKU:
- DS189844
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- LOCK
- UNITS:
- 4 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- NUT
MSRP: $12.95Now: $11.66Was: $12.95 -
GARDNER-WESTCOTT Fender Rail Bolt Kit DS-189800
GARDNER-WESTCOTT
$29.95If you're mounting fender rails to an aftermarket Softail-style frame, fastener quality directly impacts structural integrity and longevity. This Gardner-Westcott kit delivers U.S.A.-made precision...DS189800- SKU:
- DS189800
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BOLT KIT
- TYPE:
- FENDER RAIL
- UNITS:
- KIT
- LENGTH:
- 1'
$29.95 -
GARDNER-WESTCOTT Stainless Steel - Primary SP-10-24-08N
GARDNER-WESTCOTT
$56.95Protecting your motor's internals from contamination and heat loss requires quality cover components that won't degrade under sustained use. GARDNER-WESTCOTT's stainless steel covers resist corrosion...DS189379- SKU:
- DS189379
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- BASE FINISH:
- NATURAL
- BASE FINISH:
- POLISHED
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- BOLT KIT
- TYPE:
- CLUTCH COVER
- TYPE:
- PRIMARY
- UNITS:
- KIT
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- STREET
- TYPE:
- CHAIN COVER
- BASE COLOR:
- SILVER
- COLOR/FINISH:
- POLISHED
- STYLE:
- SOCKET-HEAD
$56.95Qty in Cart: 0Quantity:Price:$56.95Subtotal: -
GARDNER-WESTCOTT Stainless Steel - Primary SP-10-17-08
GARDNER-WESTCOTT
$54.95Protect your engine's critical components with corrosion-resistant stainless steel covers that maintain their finish through years of racing and riding. Gardner-Westcott's U.S.-manufactured primary...DS189378- SKU:
- DS189378
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BASE FINISH:
- POLISHED
- COLOR/FINISH:
- POLISHED
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- STYLE:
- SOCKET-HEAD
- COLOR/FINISH:
- NATURAL
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STAINLESS STEEL
- BASE COLOR:
- SILVER
- BASE FINISH:
- NATURAL
- PRODUCT NAME:
- BOLT KIT
- TYPE:
- PRIMARY COVER ONLY
$54.95Qty in Cart: 0Quantity:Price:$54.95Subtotal: -
GARDNER-WESTCOTT Stainless Steel - Primary SP-10-18-08
GARDNER-WESTCOTT
$65.95Protect your motor's critical components with Gardner-Westcott stainless steel covers that resist corrosion and maintain a clean, professional appearance through countless track hours and seasonal...DS189377- SKU:
- DS189377
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- BOLT KIT
- TYPE:
- PRIMARY COVER ONLY
- BASE COLOR:
- SILVER
- STYLE:
- SOCKET-HEAD
- COLOR/FINISH:
- SILVER
- BASE FINISH:
- POLISHED
- COLOR/FINISH:
- POLISHED
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$65.95Qty in Cart: 0Quantity:Price:$65.95Subtotal: -
GARDNER-WESTCOTT Stainless Steel Motor Set SP-88-98
GARDNER-WESTCOTT
$334.95Protect your engine's internals while maintaining factory aesthetics with Gardner-Westcott's stainless steel motor set. Stainless steel construction resists corrosion and oxidation far better than...DS189372- SKU:
- DS189372
- Availability:
- Ships Same Business Day
- Weight:
- 3.40 LBS
- BASE COLOR:
- SILVER
- MEASUREMENT SYSTEM:
- SAE
- STYLE:
- SOCKET-HEAD
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- BOLT KIT
- COLOR/FINISH:
- POLISHED
- RIDING STYLE:
- STREET
- TYPE:
- MOTOR SET
- BASE FINISH:
- POLISHED
- COLOR/FINISH:
- SILVER
- UNITS:
- KIT
$334.95 -
GARDNER-WESTCOTT Stainless Steel Motor Set SP-88-79
GARDNER-WESTCOTT
$284.95If you're rebuilding a motor or completing a comprehensive engine overhaul, sourcing quality covers and mounts individually wastes time and invites fitment inconsistencies. The Gardner-Westcott...DS189370- SKU:
- DS189370
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- RIDING STYLE:
- STREET
- TYPE:
- MOTOR SET
- BASE COLOR:
- SILVER
- BASE FINISH:
- NATURAL
- MEASUREMENT SYSTEM:
- SAE
- PRODUCT NAME:
- BOLT KIT
- STYLE:
- SOCKET-HEAD
- BASE FINISH:
- POLISHED
- COLOR/FINISH:
- POLISHED
- COLOR/FINISH:
- SILVER
- UNITS:
- KIT
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- STAINLESS STEEL
$284.95 -
GARDNER-WESTCOTT Motor P-80-87
GARDNER-WESTCOTT
$309.95A complete motor cover set is essential for protecting your engine's critical components from debris, heat damage, and premature wear. The GARDNER-WESTCOTT P-80-87 delivers OEM-quality fitment and...DS189019- SKU:
- DS189019
- Availability:
- Ships Same Business Day
- Weight:
- 2.71 LBS
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BOLT KIT
- RIDING STYLE:
- STREET
- TYPE:
- MOTOR SET
- BASE FINISH:
- POLISHED
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- UNITS:
- KIT
- BASE COLOR:
- SILVER
- MEASUREMENT SYSTEM:
- SAE
- STYLE:
- SOCKET-HEAD
- COLOR/FINISH:
- CHROME
- COLOR/FINISH:
- POLISHED
$309.95Qty in Cart: 0Quantity:Price:$309.95Subtotal:
