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 Lifters - Standard 330-0380
S&S CYCLE
MSRP: $699.95Now: $629.96Was: $699.95Noisy valve trains rob your engine of efficiency and indicate wear that compounds over time. S&S Cycle lifters eliminate mechanical valve train noise while maintaining precise hydraulic action, ensuring your engine operates at peak performance without...09290051- SKU:
- 09290051
- Availability:
- Ships Same Business Day
- Weight:
- 1.14 LBS
- SIZE IMPERIAL:
- STANDARD
- UNITS:
- SET OF 4
- RIDING STYLE:
- STREET
- STYLE:
- HYDRAULIC
- PRODUCT NAME:
- TAPPET
- SIZE:
- STANDARD
MSRP: $699.95Now: $629.96Was: $699.95 -
On Sale
S&S CYCLE Lifters - +.003 330-0381
S&S CYCLE
MSRP: $835.95Now: $752.36Was: $835.95Worn or undersized lifters compromise valve train stability and introduce costly noise into your engine bay. S&S CYCLE's +.003 lifters deliver precision-machined construction with premium hydraulic inserts that eliminate pump-up issues and maintain...09290052- SKU:
- 09290052
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- RIDING STYLE:
- STREET
- STYLE:
- HYDRAULIC
- PRODUCT NAME:
- TAPPET
- SIZE:
- OVERSIZE (+0,003')
- SIZE IMPERIAL:
- OVERSIZE (+0.003')
- UNITS:
- SET OF 4
MSRP: $835.95Now: $752.36Was: $835.95 -
On Sale
S&S CYCLE High-Quality Tappet Roller Kit 330-0378
S&S CYCLE
MSRP: $183.95Now: $165.56Was: $183.95Precise valve train geometry is non-negotiable in high-performance engines, and worn tappet rollers directly compromise lift accuracy and duration—costing you horsepower and reliability. The S&S Cycle High-Quality Tappet Roller Kit delivers the...09290053- SKU:
- 09290053
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
- TYPE:
- TAPPET
- PRODUCT NAME:
- ROLLER KIT
- MATERIAL:
- 52100 STEEL
- MATERIAL:
- CHROMOLY STEEL
MSRP: $183.95Now: $165.56Was: $183.95 -
On Sale
S&S CYCLE Lifter - Standard - XL 330-0288
S&S CYCLE
MSRP: $226.95Now: $204.26Was: $226.95Valve noise and inconsistent lash control are reliability killers in high-performance engines—especially under sustained RPM. The S&S CYCLE Standard XL Lifter eliminates these issues with precision engineering and self-cleaning valve seals that maintain...09290055- SKU:
- 09290055
- Availability:
- Ships Same Business Day
- Weight:
- 1.31 LBS
MSRP: $226.95Now: $204.26Was: $226.95Qty in Cart: 0Quantity:Price:MSRP: $226.95Now: $204.26Was: $226.95Subtotal: -
On Sale
S&S CYCLE Lifters with HL‚²T Kit 33-5353
S&S CYCLE
MSRP: $409.95Now: $368.96Was: $409.95If you're running heavy-duty valve springs and high-RPM power in your build, stock lifters will hold you back—and potentially fail under the stress. The S&S Cycle HL²T Kit addresses the real-world demands of performance engines with hand-fit,...09290061- SKU:
- 09290061
- Availability:
- Ships Same Business Day
- Weight:
- 1.41 LBS
- PRODUCT NAME:
- LIFTER
- UNITS:
- SET OF 4
- RIDING STYLE:
- STREET
- STYLE:
- HYDRAULIC
MSRP: $409.95Now: $368.96Was: $409.95Qty in Cart: 0Quantity:Price:MSRP: $409.95Now: $368.96Was: $409.95Subtotal: -
On Sale
S&S CYCLE Lifter Guide 330-0741
S&S CYCLE
MSRP: $81.95Now: $73.76Was: $81.95At high RPM and elevated valve lift, tappet stability becomes critical to engine reliability and performance. The S&S Cycle Lifter Guide 330-0741 eliminates the deflection and wear that can compromise your cam profile, ensuring consistent valve actuation...09290087- SKU:
- 09290087
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- TAPPET CUFFS
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
MSRP: $81.95Now: $73.76Was: $81.95 -
On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1004
S&S CYCLE
MSRP: $1,949.95Now: $1,754.96Was: $1,949.95Upgrading to S&S CYCLE cylinder heads transforms your Big Twin engine's breathing efficiency and power delivery, unlocking measurable gains across the RPM range. These fully assembled heads feature premium stainless steel valves and high-lift springs...09300007- SKU:
- 09300007
- Availability:
- Ships Same Business Day
- Weight:
- 24.56 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- ALUMINUM
- UNITS:
- PAIR
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
MSRP: $1,949.95Now: $1,754.96Was: $1,949.95 -
On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1504
S&S CYCLE
MSRP: $1,799.95Now: $1,619.96Was: $1,799.95S&S Cycle cylinder heads are engineered to unlock significant performance gains on Big Twin Harley-Davidson engines through improved airflow, combustion efficiency, and valve lift capabilities. Whether you're building a street performance engine or...09300008- SKU:
- 09300008
- Availability:
- Ships Same Business Day
- Weight:
- 24.75 LBS
- MATERIAL:
- ALUMINUM
- MATERIAL:
- STAINLESS STEEL
- COLOR/FINISH:
- POWDER-COATED
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
MSRP: $1,799.95Now: $1,619.96Was: $1,799.95 -
On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1491
S&S CYCLE
MSRP: $1,895.95Now: $1,706.36Was: $1,895.95A high-performance cylinder head kit engineered to unlock genuine horsepower and torque gains on Big Twin engines without requiring a complete rebuild. S&S Cycle's fully assembled heads eliminate the guesswork and potential fitment issues of sourcing...09300013- SKU:
- 09300013
- Availability:
- Ships Same Business Day
- Weight:
- 24.85 LBS
- FEATURES:
- DUAL SPARK PLUG
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- UNITS:
- KIT
- COLOR/FINISH:
- ALUMINUM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.625'
- STYLE:
- HIGH COMPRESSION
MSRP: $1,895.95Now: $1,706.36Was: $1,895.95Qty in Cart: 0Quantity:Price:MSRP: $1,895.95Now: $1,706.36Was: $1,895.95Subtotal: -
On Sale
S&S CYCLE Cylinder Head Kit - Big Twin 90-1496
S&S CYCLE
MSRP: $1,723.95Now: $1,551.56Was: $1,723.95A cylinder head is where combustion happens—and where performance is made or lost. The S&S Cycle Big Twin 90-1496 kit delivers a completely assembled, flow-optimized solution that eliminates the guesswork of sourcing individual components, getting you on...09300015- SKU:
- 09300015
- Availability:
- Ships Same Business Day
- Weight:
- 25.56 LBS
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- STYLE:
- STOCK COMPRESSION
- BORE SIZE IMPERIAL:
- 3.4375'
- COLOR/FINISH:
- ALUMINUM
- FEATURES:
- SINGLE SPARK PLUG
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
MSRP: $1,723.95Now: $1,551.56Was: $1,723.95 -
On Sale
S&S CYCLE Performance Replacement Head 106-6059
S&S CYCLE
MSRP: $1,468.95Now: $1,322.06Was: $1,468.95If you're running a smaller displacement engine and looking to unlock real performance gains without sacrificing reliability, the S&S CYCLE Performance Replacement Head 106-6059 delivers measurable improvements in flow and compression. This fully...09300154- SKU:
- 09300154
- Availability:
- Ships Same Business Day
- Weight:
- 24.60 LBS
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- DISPLACEMENT:
- 76 CC
- COLOR/FINISH:
- SILVER
- PRODUCT NAME:
- CYLINDER HEAD KIT
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
MSRP: $1,468.95Now: $1,322.06Was: $1,468.95 -
On Sale
S&S CYCLE Cylinder Head Kit 90-1499
S&S CYCLE
MSRP: $1,895.95Now: $1,706.36Was: $1,895.95A quality cylinder head is the foundation of engine performance—it controls airflow, combustion efficiency, and overall power delivery. The S&S Cycle 90-1499 arrives completely assembled and tested, eliminating the guesswork and machine shop costs...09300134- SKU:
- 09300134
- Availability:
- Ships Same Business Day
- Weight:
- 24.01 LBS
- MODEL:
- SUPER STOCK
- PRODUCT NAME:
- CYLINDER HEAD KIT
- STYLE:
- STOCK COMPRESSION
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- CAST
- COLOR/FINISH:
- ALUMINUM
- FEATURES:
- SINGLE SPARK PLUG
- MATERIAL:
- IRON
- UNITS:
- KIT
MSRP: $1,895.95Now: $1,706.36Was: $1,895.95 -
On Sale
S&S CYCLE Exhaust Stud Flange 50-0493
S&S CYCLE
MSRP: $8.95Now: $8.06Was: $8.95If you're rebuilding a classic or modern Harley engine, a quality exhaust stud flange is critical for a leak-free seal and reliable performance. The S&S Cycle 50-0493 delivers the precision fit and corrosion resistance your build demands, eliminating...09300136- SKU:
- 09300136
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
MSRP: $8.95Now: $8.06Was: $8.95 -
On Sale
S&S CYCLE Replacement Silicone Solenoid Caps 55-1009
S&S CYCLE
MSRP: $9.95Now: $8.96Was: $9.95S&S Cycle solenoid caps are subject to heat, vibration, and environmental stress during operation—and a compromised cap can lead to electrical failures or performance inconsistencies in your compression release system. This OEM replacement ensures...09300137- SKU:
- 09300137
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- WHITE
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- CAP
- TYPE:
- COMPRESSION RELEASE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $9.95Now: $8.96Was: $9.95 -
On Sale
S&S CYCLE Valve Spring Shim 90-2087
S&S CYCLE
MSRP: $7.95Now: $7.16Was: $7.95Valve spring shims are critical for maintaining proper valve train geometry and preload in high-performance engines. This S&S Cycle shim ensures accurate spring pressure across the RPM band, preventing valve float and extending component life. Whether...09300138- SKU:
- 09300138
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- BLACK
- TYPE:
- VALVE SPRING
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
MSRP: $7.95Now: $7.16Was: $7.95 -
On Sale
S&S CYCLE Cylinder Heads - Black 900-0251
S&S CYCLE
MSRP: $1,795.95Now: $1,616.36Was: $1,795.95The S&S CYCLE 900-0251 cylinder heads deliver the port flow efficiency needed to maximize performance gains both now and through future upgrades. Whether you're running a stock big-twin or planning forced induction modifications, these fully assembled...09300139- SKU:
- 09300139
- Availability:
- Ships Same Business Day
- Weight:
- 29.30 LBS
- COLOR/FINISH:
- BLACK
- DISPLACEMENT:
- 79 CC
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
- COLOR/FINISH:
- WRINKLE BLACK
- PRODUCT NAME:
- CYLINDER HEAD KIT
MSRP: $1,795.95Now: $1,616.36Was: $1,795.95 -
On Sale
S&S CYCLE Performance Replacement Head 106-6064
S&S CYCLE
MSRP: $1,553.95Now: $1,398.56Was: $1,553.95If you're running a smaller displacement engine and leaving performance on the table, the S&S Cycle Performance Replacement Head 106-6064 delivers measurable gains in flow and compression without compromise. This fully assembled, U.S.-made head is...09300141- SKU:
- 09300141
- Availability:
- Ships Same Business Day
- Weight:
- 25.21 LBS
- DISPLACEMENT:
- 76 CC
- UNITS:
- PAIR
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- POWDER-COATED
- MATERIAL:
- ALUMINUM
- MODEL:
- SUPER STOCK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CYLINDER HEAD KIT
MSRP: $1,553.95Now: $1,398.56Was: $1,553.95 -
On Sale
S&S CYCLE Spring Kit - .605" - M8 900-0958
S&S CYCLE
MSRP: $395.95Now: $356.36Was: $395.95If you're running aggressive valve timing or high-rpm applications on your M8, stock valve springs simply won't cut it—you'll lose power and risk catastrophic valve float. The S&S Cycle Spring Kit is engineered to handle the demands of forced induction...09262972- SKU:
- 09262972
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
- PRODUCT NAME:
- SPRING KIT
- SPRING SEAT PRESSURE:
- 178 LB
- UNITS:
- KIT
- MODEL:
- SIDEWINDER
- RIDING STYLE:
- STREET
- SPRING LIFT:
- 0,605'
- SPRING LIFT IMPERIAL:
- 0.605'
- SPRING OPEN PRESSURE:
- 376 LB
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- TYPE:
- VALVE
- APPLICATION:
- EXHAUST
MSRP: $395.95Now: $356.36Was: $395.95 -
On Sale
S&S CYCLE GUIDE VALVE C.I. 84- 90-2210
S&S CYCLE
MSRP: $58.95Now: $53.06Was: $58.95Valve guide wear is one of the fastest ways to lose compression and increase blow-by in your Harley engine—and once they're shot, no amount of tuning will bring back the performance you've lost. The S&S Cycle Guide Valve is a direct replacement...09262893- SKU:
- 09262893
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $58.95Now: $53.06Was: $58.95 -
On Sale
S&S CYCLE Valve Guide - +.001" 90-2211
S&S CYCLE
MSRP: $69.95Now: $62.96Was: $69.95Precision valve guides are fundamental to cylinder head integrity and engine longevity—especially in high-performance or frequently rebuilt applications. This S&S Cycle casting maintains critical clearance tolerances while providing the material...09262894- SKU:
- 09262894
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- VALVE GUIDE
- UNITS:
- EACH
- OVERBORE IMPERIAL:
- OVERSIZE (+0.001')
MSRP: $69.95Now: $62.96Was: $69.95
