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
JOKER MACHINE Points Cover - Anodized Black 02-98-1
JOKER MACHINE
MSRP: $72.95Now: $65.66Was: $72.95A clean, professional points cover protects your ignition system from debris and moisture while giving your engine bay a finished appearance. The anodized black finish resists corrosion and maintains...09401668- SKU:
- 09401668
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- COLOR/FINISH:
- ANODIZED
- MATERIAL:
- BILLET ALUMINUM
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- TYPE:
- POINT
MSRP: $72.95Now: $65.66Was: $72.95 -
On Sale
JOKER MACHINE Points Cover - Anodized Black 02-98-SB
JOKER MACHINE
MSRP: $72.95Now: $65.66Was: $72.95A quality points cover serves as both a protective barrier against moisture and debris and a visual anchor for your engine's appearance. The JOKER MACHINE Points Cover delivers reliable engine bay...09401669- SKU:
- 09401669
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- STYLE:
- SMOOTH
- TYPE:
- POINT
- RIDING STYLE:
- STREET
MSRP: $72.95Now: $65.66Was: $72.95 -
On Sale
JOKER MACHINE Points Cover - Anodized Black 02-99SB
JOKER MACHINE
MSRP: $72.95Now: $65.66Was: $72.95A points cover serves as both a protective barrier and a visual statement on your ignition system. The JOKER MACHINE Points Cover in anodized black delivers OEM-quality durability while maintaining...09401671- SKU:
- 09401671
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- EACH
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- STYLE:
- SMOOTH
- TYPE:
- POINT
- RIDING STYLE:
- STREET
MSRP: $72.95Now: $65.66Was: $72.95 -
On Sale
JOKER MACHINE Points Cover - Chrome 921102FC
JOKER MACHINE
MSRP: $78.95Now: $71.06Was: $78.95A points cover serves as both functional protection and visual polish for your ignition system. Joker Machine's chrome-finished cover shields internal components from debris and moisture while...DS325917- SKU:
- DS325917
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- TYPE:
- POINT
- STYLE:
- FLAME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $78.95Now: $71.06Was: $78.95 -
On Sale
JOKER MACHINE Points Cover - Chrome 921102C
JOKER MACHINE
MSRP: $78.95Now: $71.06Was: $78.95A quality points cover does more than protect your ignition system—it's a detail that separates a well-maintained engine from a neglected one. The JOKER MACHINE Points Cover in chrome delivers both...DS325920- SKU:
- DS325920
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- COVER
- STYLE:
- SMOOTH
- TYPE:
- POINT
- MATERIAL:
- BILLET ALUMINUM
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $78.95Now: $71.06Was: $78.95 -
On Sale
JOKER MACHINE Points Cover - Chrome 02-99J
JOKER MACHINE
MSRP: $78.95Now: $71.06Was: $78.95A points cover serves as both protection and aesthetic enhancement for your ignition system, shielding internal components from moisture, debris, and road spray while giving your engine bay a...DS325923- SKU:
- DS325923
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- COVER
- STYLE:
- JOKER RACING
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- TYPE:
- POINT
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
MSRP: $78.95Now: $71.06Was: $78.95 -
On Sale
JOKER MACHINE Points Cover - Chrome 02-99S
JOKER MACHINE
MSRP: $78.95Now: $71.06Was: $78.95A quality points cover protects your ignition system from debris, moisture, and contamination while maintaining the clean, finished look of your engine bay. The JOKER MACHINE Points Cover delivers...DS325924- SKU:
- DS325924
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- COVER
- STYLE:
- SMOOTH
- TYPE:
- POINT
MSRP: $78.95Now: $71.06Was: $78.95 -
On Sale
JOKER MACHINE Points Cover - Chrome 921102L
JOKER MACHINE
MSRP: $78.95Now: $71.06Was: $78.95A points cover is essential for protecting your ignition system from moisture, dirt, and debris while maintaining the classic aesthetic of vintage engine bays. Joker Machine's chrome points cover...DS373064- SKU:
- DS373064
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- POINT
- STYLE:
- LUCKY-7
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
MSRP: $78.95Now: $71.06Was: $78.95 -
On Sale
JOKER MACHINE Points Cover - Chrome 02-99L
JOKER MACHINE
MSRP: $78.95Now: $71.06Was: $78.95A points cover serves as both functional protection and aesthetic accent for your ignition system. The JOKER MACHINE Points Cover delivers premium chrome finishing with precision engineering, keeping...DS373065- SKU:
- DS373065
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- COLOR/FINISH:
- CHROME
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- COVER
- TYPE:
- POINT
- UNITS:
- EACH
- STYLE:
- LUCKY-7
MSRP: $78.95Now: $71.06Was: $78.95Qty in Cart: 0Quantity:Price:MSRP: $78.95Now: $71.06Was: $78.95Subtotal: -
DRAG SPECIALTIES Cam Cover - Back - Twin Cam 25369-010FB
DRAG SPECIALTIES
$129.27A worn or leaking cam cover gasket compromises engine sealing and can lead to oil seepage onto your engine bay and spark plug wires—a common failure point on Twin Cam motors. This OEM-spec...09401640- SKU:
- 09401640
- Availability:
- Ships Same Business Day
- Weight:
- 1.91 LBS
- COLOR/FINISH:
- MATTE
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- TYPE:
- CAM
- UNITS:
- EACH
$129.27 -
DRAG SPECIALTIES Piston - Twin Cam 21930-99-010
DRAG SPECIALTIES
$157.89Twin Cam engines demand pistons engineered for extreme combustion pressures and sustained high RPM operation. The DRAG Specialties Piston delivers the precision fit and durability required to...09110043- SKU:
- 09110043
- Availability:
- Ships Same Business Day
- Weight:
- 2.81 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.750'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,010'
- UNITS:
- EACH
$157.89 -
DRAG SPECIALTIES Piston - Twin Cam 21930-99-020
DRAG SPECIALTIES
$157.89Twin Cam motors demand pistons engineered for high-revving reliability and consistent ring seal under extreme combustion pressures. The DRAG Specialties piston delivers OEM-quality construction with...09110044- SKU:
- 09110044
- Availability:
- Ships Same Business Day
- Weight:
- 2.76 LBS
- BORE SIZE IMPERIAL:
- 3.750'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- +0,020'
- UNITS:
- EACH
$157.89 -
DRAG SPECIALTIES Pistons - Big Bore 22661-99A-STD
DRAG SPECIALTIES
$173.79If you're running a Twin Cam engine and need reliable big bore performance, these Drag Specialties pistons deliver the precision fit and durability demanded by serious riders. Built to handle...09110045- SKU:
- 09110045
- Availability:
- Ships Same Business Day
- Weight:
- 2.76 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 10.25:1
- UNITS:
- EACH
$173.79 -
DRAG SPECIALTIES Pistons - Big Bore 22661-99A-005
DRAG SPECIALTIES
$173.79If you're running a Twin Cam engine and demand maximum displacement without compromising reliability, big bore pistons are non-negotiable. DRAG Specialties' 22661-99A-005 pistons deliver the...09110046- SKU:
- 09110046
- Availability:
- Ships Same Business Day
- Weight:
- 2.81 LBS
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,005'
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- PRODUCT NAME:
- PISTON
- STYLE:
- BIG BORE
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.25:1
- UNITS:
- EACH
$173.79 -
DRAG SPECIALTIES Pistons - Big Bore 22661-99A-010
DRAG SPECIALTIES
$173.79If you're running a Twin Cam engine and demand reliability at high RPM, stock pistons won't cut it. DRAG Specialties Big Bore pistons are engineered to handle the demands of aggressive tuning while...09110047- SKU:
- 09110047
- Availability:
- Ships Same Business Day
- Weight:
- 2.76 LBS
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- +0,010'
- COMPRESSION RATIO IMPERIAL:
- 10.25:1
- STYLE:
- BIG BORE
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.875'
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$173.79 -
DRAG SPECIALTIES Pistons - Standard - M8 21900049-STD
DRAG SPECIALTIES
$180.15The piston is the powerhouse of your engine's combustion cycle—it converts fuel ignition into mechanical force, and worn or damaged pistons directly compromise compression, power output, and...09110049- SKU:
- 09110049
- Availability:
- Ships Same Business Day
- Weight:
- 1.13 LBS
- BORE SIZE IMPERIAL:
- 3.937'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 107'
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
$180.15Qty in Cart: 0Quantity:Price:$180.15Subtotal: -
DRAG SPECIALTIES Pistons - M8 21900049-005
DRAG SPECIALTIES
$180.15The M8 engine demands pistons engineered for high-revving reliability and consistent power delivery across extended racing seasons. DRAG Specialties pistons are precision-manufactured to OEM...09110050- SKU:
- 09110050
- Availability:
- Ships Same Business Day
- Weight:
- 2.41 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- BORE SIZE IMPERIAL:
- 3.937'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- BORE - OVERSIZE:
- +0,005'
- DISPLACEMENT:
- 107'
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
$180.15 -
DRAG SPECIALTIES Pistons - M8 21900049-010
DRAG SPECIALTIES
$180.15Whether you're building a high-revving M8 or restoring one to factory specifications, quality pistons are the foundation of reliable power delivery. DRAG Specialties pistons are engineered to...09110051- SKU:
- 09110051
- Availability:
- Ships Same Business Day
- Weight:
- 2.41 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.937'
- DISPLACEMENT:
- 107'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,010'
- PISTON MATERIAL:
- ALUMINUM ALLOY
$180.15Qty in Cart: 0Quantity:Price:$180.15Subtotal: -
DRAG SPECIALTIES Pistons - M8 21900048-STD
DRAG SPECIALTIES
$180.15High-performance pistons are the foundation of reliable engine output, and Drag Specialties has engineered these M8 pistons for maximum durability under sustained load. Whether you're rebuilding...09110053- SKU:
- 09110053
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- BORE SIZE IMPERIAL:
- 4.000'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- DISPLACEMENT:
- 114'
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$180.15 -
DRAG SPECIALTIES Piston - XL 750751-BX-LB1
DRAG SPECIALTIES
$108.07Stock piston wear is a direct path to reduced compression, power loss, and engine degradation. The DRAG SPECIALTIES XL 750751-BX-LB1 delivers OEM-quality construction at an economical price point,...DS750751- SKU:
- DS750751
- Availability:
- Ships Same Business Day
- Weight:
- 2.18 LBS
- BORE - OVERSIZE:
- +0,010'
- BORE SIZE IMPERIAL:
- 3.197'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- RIDING STYLE:
- STREET
- PISTON DIAMETER IMPERIAL:
- 3.197'
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- UNITS:
- PAIR
$108.07
