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
S&S CYCLE Valve Guide - +.002" 90-2212
S&S CYCLE
MSRP: $95.95Now: $86.36Was: $95.95Maintaining proper valve guide clearance is critical for engine longevity and consistent performance—oversized guides ensure your cylinder head can handle precision boring and honing without material compromise. The S&S Cycle +.002" valve guide delivers...09262921- SKU:
- 09262921
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- OVERBORE IMPERIAL:
- OVERSIZE (+0.002')
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $95.95Now: $86.36Was: $95.95 -
On Sale
S&S CYCLE Springs - .585" - Twin Cam 900-0594
S&S CYCLE
MSRP: $183.95Now: $165.56Was: $183.95High-lift camshaft builds demand valve springs engineered to prevent float and maintain consistent lift across the entire RPM range. The S&S CYCLE dual-spring kit delivers the controlled pressure you need without sacrificing reliability, making it...09262723- SKU:
- 09262723
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- STREET
- SPRING LIFT:
- 0,585'
- SPRING OPEN PRESSURE:
- 325 LB
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- TYPE:
- VALVE
- MATERIAL:
- STEEL
- SPRING LIFT IMPERIAL:
- 0.585'
- UNITS:
- KIT
MSRP: $183.95Now: $165.56Was: $183.95 -
On Sale
S&S CYCLE Spring Kit - .650" 900-0050
S&S CYCLE
MSRP: $254.95Now: $229.46Was: $254.95If you're building a high-revving naturally aspirated engine, valve spring performance directly impacts reliability and peak horsepower. The S&S Cycle Spring Kit is engineered to safely support .650" valve lift while maintaining consistent seat pressure...09262056- SKU:
- 09262056
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- MODEL:
- SIDEWINDER
- SPRING SEAT PRESSURE:
- 178 LB
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- STREET
- SPRING LIFT:
- 0,650'
- SPRING LIFT IMPERIAL:
- 0.650'
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- SPRING OPEN PRESSURE:
- 376 LB
- TYPE:
- VALVE
MSRP: $254.95Now: $229.46Was: $254.95 -
On Sale
S&S CYCLE Valve Springs - .650" - Twin Cam 106-5909
S&S CYCLE
MSRP: $257.95Now: $232.16Was: $257.95If you're building a high-lift Twin Cam engine and need valve springs that can handle aggressive cam profiles without sacrificing reliability, S&S Cycle's .650" valve springs are engineered for the job. These domestically manufactured springs deliver the...09262069- SKU:
- 09262069
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- SPRING LIFT:
- 0,650'
- UNITS:
- KIT
- MODEL:
- SIDEWINDER
- SPRING OPEN PRESSURE:
- 376 LB
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SPRING KIT
- SPRING SEAT PRESSURE:
- 178 LB
- TYPE:
- VALVE
- APPLICATION:
- INTAKE
- RIDING STYLE:
- STREET
- SPRING LIFT IMPERIAL:
- 0.650'
MSRP: $257.95Now: $232.16Was: $257.95 -
On Sale
S&S CYCLE Cam - 465G - M8 310-1001A
S&S CYCLE
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95If you're running an M8 in a touring application, weak oil management will cost you reliability and power. The S&S Cycle Cam 465G delivers the scavenging capacity and debris protection your engine needs to perform consistently at high RPM, while the...09251299- SKU:
- 09251299
- Availability:
- Ships Same Business Day
- Weight:
- 12.25 LBS
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- FEATURES:
- WATER COOLED
- GRIND:
- 465G
- PRODUCT NAME:
- CAMCHEST KIT
- TYPE:
- GEAR
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95Qty in Cart: 0Quantity:Price:MSRP: $1,924.95Now: $1,732.46Was: $1,924.95Subtotal: -
On Sale
S&S CYCLE Cam - 475G - M8 310-1002A
S&S CYCLE
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95If you're pushing your M8 to higher RPMs and demand precision valve timing without the slop of a stock chain drive, the S&S Cycle 475G cam kit eliminates timing chain lash and enables higher cam lifts by reversing rear cam rotation. This gear drive...09251300- SKU:
- 09251300
- Availability:
- Ships Same Business Day
- Weight:
- 12.25 LBS
- GRIND:
- 475G
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- FEATURES:
- WATER COOLED
- PRODUCT NAME:
- CAMCHEST KIT
- TYPE:
- GEAR
- UNITS:
- KIT
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95 -
On Sale
S&S CYCLE Cam - 465G - M8 310-1005A
S&S CYCLE
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95If you're running an M8 in a touring application, cam quality directly impacts throttle response, reliability, and how your engine performs across the RPM range. The S&S Cycle 465G is purpose-built for torque delivery and stability at sustained high RPM,...09251303- SKU:
- 09251303
- Availability:
- Ships Same Business Day
- Weight:
- 12.05 LBS
- RIDING STYLE:
- STREET
- FEATURES:
- OIL COOLED
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- GRIND:
- 465G
- PRODUCT NAME:
- CAMCHEST KIT
- TYPE:
- GEAR
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95 -
On Sale
S&S CYCLE Cam - 475G - M8 310-1006A
S&S CYCLE
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95If you're serious about maximizing cam lift and eliminating timing chain slop, a gear drive conversion delivers the precision and clearance you need. By reversing rear cam rotation and removing chain lash, S&S gear drive kits enable higher valve events...09251304- SKU:
- 09251304
- Availability:
- Ships Same Business Day
- Weight:
- 12.30 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- CAMCHEST KIT
- GRIND:
- 475G
- TYPE:
- GEAR
- COLOR/FINISH:
- CHROME
- FEATURES:
- OIL COOLED
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95 -
On Sale
S&S CYCLE Cam - 465G - M8 310-1009A
S&S CYCLE
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95The S&S Cycle 465G cam delivers the torque characteristics touring riders demand without sacrificing reliability or rideability. Built from billet aluminum with enhanced materials and precision engineering, this cam eliminates the distortion issues...09251307- SKU:
- 09251307
- Availability:
- Ships Same Business Day
- Weight:
- 12.45 LBS
- COLOR/FINISH:
- GLOSS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- GEAR
- COLOR/FINISH:
- BLACK
- FEATURES:
- WATER COOLED
- GRIND:
- 465G
- PRODUCT NAME:
- CAMCHEST KIT
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95 -
On Sale
S&S CYCLE Cam - 475G - M8 310-1010A
S&S CYCLE
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95If you're running an M8 Harley and serious about maximizing valve lift and timing precision, a gear drive cam conversion eliminates the slop inherent in stock chain drives—giving you tighter valve events and the clearance to run aggressive cam profiles...09251308- SKU:
- 09251308
- Availability:
- Ships Same Business Day
- Weight:
- 12.35 LBS
- COLOR/FINISH:
- BLACK
- FEATURES:
- WATER COOLED
- PRODUCT NAME:
- CAMCHEST KIT
- TYPE:
- GEAR
- UNITS:
- KIT
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
- GRIND:
- 475G
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95 -
On Sale
S&S CYCLE Cam Chest Kit - 465 Series - Gear Drive - Oil Cooled - M8 310-1013A
S&S CYCLE
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95If you're running a big-bore Harley-Davidson M8 and want reliable cam timing without the wear and failure modes of a stock chain tensioner, the S&S 465 Gear Drive Kit delivers the precision and durability you need. This system maintains consistent valve...09251311- SKU:
- 09251311
- Availability:
- Ships Same Business Day
- Weight:
- 12.50 LBS
- COLOR/FINISH:
- BLACK
- GRIND:
- 465G
- PRODUCT NAME:
- CAMCHEST KIT
- TYPE:
- GEAR
- FEATURES:
- OIL COOLED
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95Qty in Cart: 0Quantity:Price:MSRP: $1,924.95Now: $1,732.46Was: $1,924.95Subtotal: -
On Sale
S&S CYCLE Cam Chest Kit - 475G - Oil Cooled - M8 310-1014A
S&S CYCLE
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95The S&S CYCLE Cam Chest Kit 475G is engineered for M8 engines that demand reliable oiling under extreme operating conditions. Whether you're pushing peak RPM on the track or maintaining consistent performance in a high-output street build, this kit...09251312- SKU:
- 09251312
- Availability:
- Ships Same Business Day
- Weight:
- 12.45 LBS
- PRODUCT NAME:
- CAMCHEST KIT
- TYPE:
- GEAR
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- UNITS:
- KIT
- FEATURES:
- OIL COOLED
- GRIND:
- 475G
- RIDING STYLE:
- STREET
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95Qty in Cart: 0Quantity:Price:MSRP: $1,924.95Now: $1,732.46Was: $1,924.95Subtotal: -
On Sale
S&S CYCLE Cam - 550G - M8 310-1083A
S&S CYCLE
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95The S&S Cycle 550G cam is engineered for big-bore M8 applications that demand reliability at sustained high RPM and high-lift conditions. Independent scavenge sections and increased flow capacity on both feed and scavenge sides ensure consistent oil...09251317- SKU:
- 09251317
- Availability:
- Ships Same Business Day
- Weight:
- 13.60 LBS
- FEATURES:
- OIL COOLED
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- GEAR
- GRIND:
- 550G
- PRODUCT NAME:
- CAMCHEST KIT
- UNITS:
- KIT
MSRP: $1,924.95Now: $1,732.46Was: $1,924.95 -
On Sale
S&S CYCLE Cam Chest Kit - 585 EZ Start - Chain Drive 330-0546
S&S CYCLE
MSRP: $2,025.95Now: $1,823.36Was: $2,025.95If you're running a Harley-Davidson and want measurable gains in power delivery and throttle response, upgrading to performance camshafts is one of the highest-ROI modifications available. The S&S CYCLE 585 EZ Start Kit delivers higher valve lift and...09251181- SKU:
- 09251181
- Availability:
- Ships Same Business Day
- Weight:
- 11.20 LBS
- PRODUCT NAME:
- CAM KIT
- RIDING STYLE:
- STREET
- GRIND:
- 585 SERIES
- TYPE:
- CHAIN
- UNITS:
- KIT
- MODEL:
- EASY START
MSRP: $2,025.95Now: $1,823.36Was: $2,025.95 -
On Sale
S&S CYCLE CAM KIT 475G M8 17- 330-0645
S&S CYCLE
MSRP: $465.95Now: $419.36Was: $465.95If you're running a 107" or 114" M8 and want to unlock genuine performance gains without replacing your entire valve train, the S&S Cycle 475G Cam Kit delivers measurable horsepower through precision-engineered cam profiles. This bolt-on upgrade pairs...09251172- SKU:
- 09251172
- Availability:
- Ships Same Business Day
- Weight:
- 4.15 LBS
- EXHAUST CLOSE IMPERIAL:
- 28.5° FRONT, 20.2° REAR
- EXHAUST OPEN IMPERIAL:
- 55.5° FRONT, 52.2° REAR
- INTAKE DURATION IMPERIAL:
- 213.5°
- INTAKE OPEN IMPERIAL:
- 6.2° FRONT, 2.2° REAR
- UNITS:
- KIT
- APPLICATION:
- INTAKE
- EXHAUST DURATION IMPERIAL:
- 263.9° FRONT, 252.5° REAR
- GRIND:
- 475G
- INTAKE CLOSE IMPERIAL:
- 27.2° FRONT, 31.2° REAR
- RIDING STYLE:
- STREET
- TYPE:
- GEAR
- EXHAUST LIFT IMPERIAL:
- 0.475'
- INTAKE LIFT IMPERIAL:
- 0.475'
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- CAM
MSRP: $465.95Now: $419.36Was: $465.95 -
On Sale
S&S CYCLE CAM KIT 550C M8 17- 330-0643
S&S CYCLE
MSRP: $299.95Now: $269.96Was: $299.95The S&S Cycle 550C cam kit delivers the horsepower gains your 114" or larger M8 engine demands without compromising reliability. This is the proven choice for builders who want measurable performance increases backed by decades of S&S engineering...09251173- SKU:
- 09251173
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- EXHAUST DURATION IMPERIAL:
- 273.1° FRONT, 277.8° REAR
- INTAKE CLOSE IMPERIAL:
- 29.4° FRONT, 31.1° REAR
- INTAKE DURATION IMPERIAL:
- 218.9° FRONT, 214.2° REAR
- INTAKE LIFT IMPERIAL:
- 0.550'
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- INTAKE OPEN IMPERIAL:
- 9.4° FRONT, 3.1° REAR
- PRODUCT NAME:
- CAM
- APPLICATION:
- INTAKE
- GRIND:
- 550C
- TYPE:
- CHAIN
- APPLICATION:
- EXHAUST
- EXHAUST CLOSE IMPERIAL:
- 30.5° FRONT, 38.4° REAR
- EXHAUST LIFT IMPERIAL:
- 0.550'
- EXHAUST OPEN IMPERIAL:
- 62.5° FRONT, 59.4° REAR
MSRP: $299.95Now: $269.96Was: $299.95 -
On Sale
S&S CYCLE CAM KIT 550G M8 17- 330-0647
S&S CYCLE
MSRP: $465.95Now: $419.36Was: $465.95The S&S Cycle 550G cam kit is engineered for riders running 114" and larger M8 engines who demand reliable, measurable horsepower gains without compromise. This complete kit eliminates guesswork—all required bearings, O-rings, and hardware are included,...09251174- SKU:
- 09251174
- Availability:
- Ships Same Business Day
- Weight:
- 4.25 LBS
- EXHAUST DURATION IMPERIAL:
- 273.1° FRONT, 277.8° REAR
- GRIND:
- 550G
- INTAKE CLOSE IMPERIAL:
- 29.4° FRONT, 31.1° REAR
- INTAKE DURATION IMPERIAL:
- 218.9° FRONT, 214.2° REAR
- INTAKE LIFT IMPERIAL:
- 0.550'
- RIDING STYLE:
- STREET
- INTAKE OPEN IMPERIAL:
- 9.4° FRONT, 3.1° REAR
- PRODUCT NAME:
- CAM
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- EXHAUST CLOSE IMPERIAL:
- 30.5° FRONT, 38.4° REAR
- EXHAUST LIFT IMPERIAL:
- 0.550'
- EXHAUST OPEN IMPERIAL:
- 62.5° FRONT, 59.4° REAR
- TYPE:
- GEAR
MSRP: $465.95Now: $419.36Was: $465.95 -
On Sale
S&S CYCLE Intake Valve - 1.95" - Big Twin 90-2015
S&S CYCLE
MSRP: $90.95Now: $81.86Was: $90.95Maximizing airflow into your Big Twin engine starts with precision-engineered valve components that meet exacting tolerances. The S&S Cycle 1.95" intake valve delivers the reliability and performance consistency that professional racers and serious...09260128- SKU:
- 09260128
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- STREET
- HEAD DIAMETER IMPERIAL:
- 1.950'
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
MSRP: $90.95Now: $81.86Was: $90.95 -
On Sale
S&S CYCLE Exhaust Valve - 1.72" - Big Twin 90-2022
S&S CYCLE
MSRP: $90.95Now: $81.86Was: $90.95Maximizing exhaust flow is critical to unlocking your Big Twin's full potential, and valve quality directly impacts combustion efficiency and horsepower delivery. The S&S Cycle 1.72" exhaust valve is engineered to precise tolerances and manufactured in...09260129- SKU:
- 09260129
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- HEAD DIAMETER IMPERIAL:
- 1.720'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
MSRP: $90.95Now: $81.86Was: $90.95 -
On Sale
S&S CYCLE Camshaft - 540C - Chain Drive - M8 330-0713
S&S CYCLE
MSRP: $299.95Now: $269.96Was: $299.95If you're running a big bore M8 and want to maximize low-to-mid-range torque without chasing high RPM power, the S&S Cycle 540C camshaft delivers measurable gains where it matters most. This gear drive cam maintains superior valve timing accuracy...09251337- SKU:
- 09251337
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- CAMSHAFT
- TYPE:
- CHAIN
- RIDING STYLE:
- STREET
MSRP: $299.95Now: $269.96Was: $299.95
