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
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On Sale
S&S CYCLE Cam Chest Kit without Cams - Gear Drive - Oil Cooled - Chrome Pushrods - Twin Cam 310-1267
S&S CYCLE
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95If you're serious about cam chest reliability and oil flow efficiency on your Twin Cam, this S&S kit eliminates the bottlenecks that limit performance at high RPM. With 44% increased supply flow and 58% scavenging improvement, you'll get faster pump-up,...09251577- SKU:
- 09251577
- Availability:
- Ships Same Business Day
- Weight:
- 8.94 LBS
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95 -
On Sale
S&S CYCLE Cam Chest Kit without Cams - Gear Drive - Oil Cooled - Black Pushrods - Twin Cam 310-1268
S&S CYCLE
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95If you're running a Twin Cam engine at the edge of performance limits, oil cooling and scavenging efficiency directly impact reliability and longevity. The S&S CYCLE Cam Chest Kit eliminates factory bottlenecks with a precision gear drive system and...09251578- SKU:
- 09251578
- Availability:
- Ships Same Business Day
- Weight:
- 9.04 LBS
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95Qty in Cart: 0Quantity:Price:MSRP: $1,522.95Now: $1,370.66Was: $1,522.95Subtotal: -
On Sale
S&S CYCLE Cam Chest Kit without Cams - Chain Drive - Black Pushrods - Twin Cam 310-1270
S&S CYCLE
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95If you're running a Twin Cam engine, oil management directly impacts reliability and valve train longevity. This S&S Cycle Cam Chest Kit eliminates factory inefficiencies with independent scavenge sections and a chain drive design that delivers...09251580- SKU:
- 09251580
- Availability:
- Ships Same Business Day
- Weight:
- 7.90 LBS
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95 -
On Sale
S&S CYCLE Cam Chest Kit without Cams - Chain Drive - Chrome Pushrods - Twin Cam 310-1271
S&S CYCLE
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95If you're running a Twin Cam engine, oil management and valve train reliability are non-negotiable. The S&S Cycle Cam Chest Kit eliminates weak OEM design points with precision billet construction, independent scavenge sections, and adjustable pressure...09251581- SKU:
- 09251581
- Availability:
- Ships Same Business Day
- Weight:
- 7.76 LBS
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95Qty in Cart: 0Quantity:Price:MSRP: $1,522.95Now: $1,370.66Was: $1,522.95Subtotal: -
On Sale
S&S CYCLE Cam Chest Kit without Cams - Chain Drive - Black Pushrods - Twin Cam 310-1272
S&S CYCLE
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95If you're running a Twin Cam engine, cam chest integrity directly impacts oil delivery, valve train stability, and overall reliability under sustained RPM loads. The S&S Cycle Cam Chest Kit eliminates weak OEM designs with precision-machined construction...09251582- SKU:
- 09251582
- Availability:
- Ships Same Business Day
- Weight:
- 7.75 LBS
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95Qty in Cart: 0Quantity:Price:MSRP: $1,522.95Now: $1,370.66Was: $1,522.95Subtotal: -
On Sale
S&S CYCLE Cam Chest Kit without Cams - Chain Drive - Chrome Pushrods - Twin Cam 310-1273
S&S CYCLE
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95If you're running a Twin Cam engine, oil management directly impacts reliability and longevity. This S&S Cycle Cam Chest Kit delivers optimized oil flow and reduced parasitic drag through its chain-drive design, while the removable passage plugs make...09251583- SKU:
- 09251583
- Availability:
- Ships Same Business Day
- Weight:
- 7.59 LBS
MSRP: $1,522.95Now: $1,370.66Was: $1,522.95 -
On Sale
S&S CYCLE Billet Head Breather Kit - Anodized Blue - M8 900-1186
S&S CYCLE
MSRP: $299.95Now: $269.96Was: $299.95If you're running an M8 Harley and tired of excessive oil blow-by fouling your intake and burning off in the combustion chamber, upgrading to a quality billet breather kit isn't optional—it's maintenance. The S&S CYCLE Billet Head Breather Kit replaces...09300243- SKU:
- 09300243
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $299.95Now: $269.96Was: $299.95Qty in Cart: 0Quantity:Price:MSRP: $299.95Now: $269.96Was: $299.95Subtotal: -
On Sale
S&S CYCLE MK136 Black Edition Engine - 550G Gear Drive - Oil Cooled - Race Only - M8 Touring 310-1289
S&S CYCLE
MSRP: $11,999.95Now: $10,799.96Was: $11,999.95The S&S Cycle MK136 Black Edition is purpose-built for M8 Touring platforms where race-level performance demands precision engineering and reliability under extreme conditions. This is not a modified stock engine—it's a ground-up performance assembly...09010264- SKU:
- 09010264
- Availability:
- Ships Same Business Day
- Weight:
- 157.00 LBS
MSRP: $11,999.95Now: $10,799.96Was: $11,999.95Qty in Cart: 0Quantity:Price:MSRP: $11,999.95Now: $10,799.96Was: $11,999.95Subtotal: -
On Sale
S&S CYCLE MK136 Black Edition Engine - Oil Cooled - 49 State - M8 Touring 310-1290
S&S CYCLE
MSRP: $11,999.95Now: $10,799.96Was: $11,999.95The S&S Cycle MK136 Black Edition delivers serious displacement and performance gains without compromising the stock engine footprint of your M8 Touring. High-flow cylinder heads, precision-engineered cooling, and forged internals work together to...09010265- SKU:
- 09010265
- Availability:
- Ships Same Business Day
- Weight:
- 174.00 LBS
MSRP: $11,999.95Now: $10,799.96Was: $11,999.95Qty in Cart: 0Quantity:Price:MSRP: $11,999.95Now: $10,799.96Was: $11,999.95Subtotal: -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 6" VTOL-006C-CL
GOODRIDGE
MSRP: $60.95Now: $54.86Was: $60.95Fuel delivery integrity is non-negotiable in high-performance applications—compromised lines mean inconsistent pressure, potential leaks, and catastrophic engine damage. The GOODRIDGE Universal Fuel Line eliminates guesswork with pre-assembled stainless...07110246- SKU:
- 07110246
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
MSRP: $60.95Now: $54.86Was: $60.95 -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 7" VTOL-007C-CL
GOODRIDGE
MSRP: $61.95Now: $55.76Was: $61.95A quality fuel line is fundamental to reliable engine performance and safety—corrosion, leaks, or improper sizing can compromise fuel delivery and create serious hazards. The GOODRIDGE Universal Fuel Line delivers dependable, maintenance-free operation...07110247- SKU:
- 07110247
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $61.95Now: $55.76Was: $61.95 -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 8" VTOL-008C-CL
GOODRIDGE
MSRP: $62.95Now: $56.66Was: $62.95Fuel system reliability directly impacts performance and safety, making quality fuel lines non-negotiable for any serious build. The GOODRIDGE Universal Fuel Line delivers consistent flow with stainless steel construction that resists corrosion and...07110248- SKU:
- 07110248
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $62.95Now: $56.66Was: $62.95 -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 9" VTOL-009C-CL
GOODRIDGE
MSRP: $63.95Now: $57.56Was: $63.95Reliable fuel delivery is non-negotiable in high-performance applications, and compromised fuel lines can lead to leaks, pressure loss, or contamination that degrades engine performance. The GOODRIDGE Universal Fuel Line eliminates guesswork with...07110249- SKU:
- 07110249
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $63.95Now: $57.56Was: $63.95 -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 10" VTOL-010C-CL
GOODRIDGE
MSRP: $64.95Now: $58.46Was: $64.95Fuel system reliability is non-negotiable in racing and high-performance applications, and compromised fuel lines are a common failure point that can sideline your build. The GOODRIDGE Universal Fuel Line eliminates guesswork with its pre-assembled...07110250- SKU:
- 07110250
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $64.95Now: $58.46Was: $64.95 -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 11" VTOL-011C-CL
GOODRIDGE
MSRP: $64.95Now: $58.46Was: $64.95Fuel system reliability is non-negotiable in racing and high-performance builds—a single weak connection can mean catastrophic failure. The GOODRIDGE Universal Fuel Line delivers the durability and precision fit you need with stainless steel construction...07110251- SKU:
- 07110251
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $64.95Now: $58.46Was: $64.95 -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 13" VTOL-013C-CL
GOODRIDGE
MSRP: $66.95Now: $60.26Was: $66.95Precision fuel delivery starts with reliable plumbing. The GOODRIDGE Universal Fuel Line eliminates guesswork with pre-assembled stainless steel construction and AN6 swivel fittings that integrate seamlessly into custom and OEM fuel systems. Whether...07110252- SKU:
- 07110252
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $66.95Now: $60.26Was: $66.95 -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 14" VTOL-014C-CL
GOODRIDGE
MSRP: $68.95Now: $62.06Was: $68.95Fuel system reliability is non-negotiable in high-performance applications, and substandard hose routing compromises both safety and efficiency. This GOODRIDGE universal fuel line eliminates guesswork with its pre-assembled stainless steel construction...07110253- SKU:
- 07110253
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
MSRP: $68.95Now: $62.06Was: $68.95 -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 15" VTOL-015C-CL
GOODRIDGE
MSRP: $69.95Now: $62.96Was: $69.95A reliable fuel delivery system is the foundation of any high-performance build, and substandard lines compromise both safety and efficiency. The GOODRIDGE Universal Fuel Line eliminates guesswork with pre-assembled construction and stainless steel...07110254- SKU:
- 07110254
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
MSRP: $69.95Now: $62.96Was: $69.95 -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 17" VTOL-017C-CL
GOODRIDGE
MSRP: $71.95Now: $64.76Was: $71.95A quality fuel line is the foundation of a reliable fuel delivery system—cheap alternatives can leak, degrade, and compromise performance under pressure. The GOODRIDGE Universal Fuel Line eliminates guesswork with pre-assembled stainless steel...07110255- SKU:
- 07110255
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
MSRP: $71.95Now: $64.76Was: $71.95 -
On Sale
GOODRIDGE Universal Fuel Line - Stainless Steel - 19" VTOL-019C-CL
GOODRIDGE
MSRP: $73.95Now: $66.56Was: $73.95Fuel line integrity is non-negotiable in high-performance applications—vibration, heat cycling, and pressure spikes will compromise standard rubber lines. The GOODRIDGE Universal Fuel Line delivers dependable flow with stainless steel construction and...07110256- SKU:
- 07110256
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
MSRP: $73.95Now: $66.56Was: $73.95
