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
KIBBLEWHITE Exhaust Valve Guide 20-21031M
KIBBLEWHITE
MSRP: $15.10Now: $13.59Was: $15.10If you're building or rebuilding a high-performance engine, valve guide quality directly impacts flow efficiency, durability, and ring life. The KIBBLEWHITE 20-21031M exhaust valve guide delivers...09263024- SKU:
- 09263024
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.4760'
- SIZE IMPERIAL:
- OVERSIZE (+0.001')
- APPLICATION:
- EXHAUST
- MATERIAL:
- MANGANESE-BRONZE
- BASE COLOR:
- BROWN
- INSIDE DIAMETER IMPERIAL:
- 0.2342'
MSRP: $15.10Now: $13.59Was: $15.10 -
On Sale
KIBBLEWHITE Intake Valve Guide 20-20861M
KIBBLEWHITE
MSRP: $15.10Now: $13.59Was: $15.10If you're rebuilding a cylinder head and want reliable valve guides without the hassle of specialized honing equipment, the KIBBLEWHITE 20-20861M delivers precision machining at a practical price...09262938- SKU:
- 09262938
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- OVERSIZE (+0.001')
- UNITS:
- EACH
- MATERIAL:
- BRONZE
- RIDING STYLE:
- STREET
- INSIDE DIAMETER IMPERIAL:
- 0.3100'
- OUTSIDE DIAMETER IMPERIAL:
- 0.5635'
MSRP: $15.10Now: $13.59Was: $15.10 -
On Sale
KIBBLEWHITE Exhaust Valve Guide 20-20871M
KIBBLEWHITE
MSRP: $15.10Now: $13.59Was: $15.10If you're rebuilding a cylinder head, valve guide wear is a silent killer of performance and reliability. Kibblewhite's manganese bronze guides deliver superior heat conductivity to keep valve...09262941- SKU:
- 09262941
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- OVERSIZE (+0.001')
- UNITS:
- EACH
- MATERIAL:
- BRONZE
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- STREET
- INSIDE DIAMETER IMPERIAL:
- 0.3100'
- OUTSIDE DIAMETER IMPERIAL:
- 0.5635'
MSRP: $15.10Now: $13.59Was: $15.10 -
On Sale
KIBBLEWHITE Valve Keys - 8 pairs 51029-8
KIBBLEWHITE
MSRP: $66.61Now: $59.95Was: $66.61Valve keepers are critical components that secure your valve springs under extreme combustion pressures and high RPM conditions. Without reliable valve keys, you risk valve float, catastrophic engine...09262969- SKU:
- 09262969
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MATERIAL:
- STEEL
- TYPE:
- VALVE
- UNITS:
- 16 PACK
- PRODUCT NAME:
- KEY
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE
MSRP: $66.61Now: $59.95Was: $66.61Qty in Cart: 0Quantity:Price:MSRP: $66.61Now: $59.95Was: $66.61Subtotal: -
On Sale
KIBBLEWHITE Valve Stem Seals 71045-4
KIBBLEWHITE
MSRP: $13.96Now: $12.56Was: $13.96Valve stem seals are a critical wear item that directly impacts engine compression, oil consumption, and longevity. The KIBBLEWHITE 71045-4 seals maintain consistent performance across both intake...09262970- SKU:
- 09262970
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- INTAKE
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- TYPE:
- VALVE
- UNITS:
- 4 PACK
MSRP: $13.96Now: $12.56Was: $13.96 -
On Sale
KIBBLEWHITE Spring Kit - .675" - Evolution/Twin Cam 20-21600
KIBBLEWHITE
MSRP: $219.39Now: $197.45Was: $219.39If you're running high-mileage or high-rpm applications, OEM titanium intake valves will eventually become a limiting factor in your engine's longevity and reliability. The KIBBLEWHITE Spring Kit...09263168- SKU:
- 09263168
- Availability:
- Ships Same Business Day
- Weight:
- 1.51 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- STREET
- SPRING LIFT IMPERIAL:
- 0.675'
- SPRING OPEN PRESSURE:
- 450 LB
- APPLICATION:
- EXHAUST
- SPRING LIFT:
- 0,675'
- SPRING SEAT PRESSURE:
- 185 IB
- UNITS:
- KIT
MSRP: $219.39Now: $197.45Was: $219.39 -
On Sale
KIBBLEWHITE Intake Valve - Standard - M8 20-21012H
KIBBLEWHITE
MSRP: $32.78Now: $29.50Was: $32.78If you're running an M8 engine at the limit, valve durability becomes non-negotiable. KIBBLEWHITE's Black Diamond intake valves are engineered to outlast OEM components through advanced metallurgy...09263305- SKU:
- 09263305
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- STEM DIAMETER IMPERIAL:
- 0.2347'
- RIDING STYLE:
- STREET
- TULIP ANGLE:
- 10°
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- HEAD DIAMETER IMPERIAL:
- 1.571'
- LENGTH IMPERIAL:
- 4.015'
- PRODUCT NAME:
- VALVE
MSRP: $32.78Now: $29.50Was: $32.78 -
On Sale
KIBBLEWHITE Valve Kit - Knucklehead 20-22000
KIBBLEWHITE
MSRP: $117.85Now: $106.07Was: $117.85Valve degradation is one of the fastest paths to power loss and engine reliability issues in high-performance applications. The KIBBLEWHITE Valve Kit delivers Black Diamond™ stainless steel valves...09263307- SKU:
- 09263307
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- VALVE KIT
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
MSRP: $117.85Now: $106.07Was: $117.85 -
On Sale
KIBBLEWHITE Valve Guide 20-4322C
KIBBLEWHITE
MSRP: $9.84Now: $8.86Was: $9.84Valve guide wear is one of the most common culprits behind oil consumption, loss of compression, and eventual catastrophic engine failure. The KIBBLEWHITE 20-4322C replaces worn guides with...DS199761- SKU:
- DS199761
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- CAST IRON
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER IMPERIAL:
- 0.3090'
- UNITS:
- EACH
- OUTSIDE DIAMETER IMPERIAL:
- 0.5640'
- SIZE IMPERIAL:
- OVERSIZE (+0.002')
MSRP: $9.84Now: $8.86Was: $9.84 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2038C
KIBBLEWHITE
MSRP: $9.84Now: $8.86Was: $9.84Worn valve guides compromise cylinder head integrity and increase blowby, robbing your Big Twin of power and reliability. The KIBBLEWHITE 20-2038C restores precise valve-to-guide clearance, ensuring...09261985- SKU:
- 09261985
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- MATERIAL:
- CAST IRON
- OUTSIDE DIAMETER IMPERIAL:
- 0.5730'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- SIZE IMPERIAL:
- OVERSIZE (+0.010')
- UNITS:
- EACH
MSRP: $9.84Now: $8.86Was: $9.84 -
On Sale
KIBBLEWHITE Cast Iron Valve Guide 20-2064C
KIBBLEWHITE
MSRP: $9.84Now: $8.86Was: $9.84A precision-machined valve guide engineered for durability in modern fuel systems and demanding engine builds. KIBBLEWHITE's cast iron construction ensures reliable performance whether you're running...09261996- SKU:
- 09261996
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE GUIDE
- INSIDE DIAMETER IMPERIAL:
- 0.3745'
- MATERIAL:
- CAST IRON
- OUTSIDE DIAMETER IMPERIAL:
- 0.6290'
- RIDING STYLE:
- STREET
MSRP: $9.84Now: $8.86Was: $9.84 -
On Sale
KIBBLEWHITE Valve Guide 20-20700
KIBBLEWHITE
MSRP: $29.60Now: $26.64Was: $29.60If you're rebuilding a high-revving engine or replacing worn valve guides, precision matters. KIBBLEWHITE's C630 machined guides deliver reliable service across naturally aspirated and...09262014- SKU:
- 09262014
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.5620'
- SIZE IMPERIAL:
- STANDARD
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER IMPERIAL:
- 0.2750'
- BASE COLOR:
- BROWN
- MATERIAL:
- C630 BRONZE
- UNITS:
- EACH
MSRP: $29.60Now: $26.64Was: $29.60 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-30HSC
KIBBLEWHITE
MSRP: $9.84Now: $8.86Was: $9.84Proper valve guide clearance is critical to engine reliability and longevity, especially in high-performance Big Twin applications where tight tolerances directly impact compression and seal...09262029- SKU:
- 09262029
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- MATERIAL:
- CAST IRON
- OUTSIDE DIAMETER IMPERIAL:
- 0.5900'
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- SIZE IMPERIAL:
- OVERSIZE (+0.025')
- UNITS:
- EACH
MSRP: $9.84Now: $8.86Was: $9.84 -
On Sale
KIBBLEWHITE Valve Guide 20-2029M
KIBBLEWHITE
MSRP: $15.10Now: $13.59Was: $15.10Valve guide wear can compromise your engine's compression, increase oil consumption, and accelerate valve seat degradation—all costly problems that compound over time. The KIBBLEWHITE 20-2029M...09262273- SKU:
- 09262273
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- SIZE IMPERIAL:
- OVERSIZE (+0.010')
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- OUTSIDE DIAMETER IMPERIAL:
- 0.5750'
- MATERIAL:
- BRONZE
MSRP: $15.10Now: $13.59Was: $15.10 -
On Sale
KIBBLEWHITE Valve Guide 20-2060M
KIBBLEWHITE
MSRP: $15.10Now: $13.59Was: $15.10If you're rebuilding a cylinder head and want to avoid the expense and complexity of specialized honing equipment, Kibblewhite's manganese bronze valve guides deliver precision performance without...09262287- SKU:
- 09262287
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- BRONZE
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- APPLICATION:
- EXHAUST
- OUTSIDE DIAMETER IMPERIAL:
- 0.6250'
- SIZE IMPERIAL:
- STANDARD
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.3745'
MSRP: $15.10Now: $13.59Was: $15.10 -
On Sale
KIBBLEWHITE Valve Guide 20-2064M
KIBBLEWHITE
MSRP: $15.10Now: $13.59Was: $15.10If you're rebuilding a cylinder head, valve guide quality directly impacts compression sealing, oil consumption, and overall engine longevity. The Kibblewhite 20-2064M valve guides deliver precision...09262290- SKU:
- 09262290
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- INSIDE DIAMETER IMPERIAL:
- 0.3745'
- OUTSIDE DIAMETER IMPERIAL:
- 0.6290'
- MATERIAL:
- BRONZE
- SIZE IMPERIAL:
- OVERSIZE (+0.004')
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
MSRP: $15.10Now: $13.59Was: $15.10 -
On Sale
KIBBLEWHITE Valve Guide 20-2132M
KIBBLEWHITE
MSRP: $15.10Now: $13.59Was: $15.10If you're rebuilding a cylinder head, valve guide quality directly impacts compression, longevity, and reliability. KIBBLEWHITE's manganese bronze guides deliver superior heat conductivity to keep...09262309- SKU:
- 09262309
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- BRONZE
- OUTSIDE DIAMETER IMPERIAL:
- 0.5640'
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
- INSIDE DIAMETER IMPERIAL:
- 0.3098'
- PRODUCT NAME:
- VALVE GUIDE
- RIDING STYLE:
- STREET
- SIZE IMPERIAL:
- OVERSIZE (+0.002')
MSRP: $15.10Now: $13.59Was: $15.10 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2132C
KIBBLEWHITE
MSRP: $9.84Now: $8.86Was: $9.84Valve guides are critical to maintaining precise valve sealing and preventing oil blow-by that compromises engine efficiency. The KIBBLEWHITE 20-2132C is precision-machined from cast iron to...09260724- SKU:
- 09260724
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- STREET
- INSIDE DIAMETER IMPERIAL:
- 0.3085'
- OUTSIDE DIAMETER IMPERIAL:
- 0.5640'
- PRODUCT NAME:
- VALVE GUIDE
- APPLICATION:
- EXHAUST
- MATERIAL:
- CAST IRON
- SIZE IMPERIAL:
- OVERSIZE (+0.002')
- UNITS:
- EACH
MSRP: $9.84Now: $8.86Was: $9.84 -
On Sale
KIBBLEWHITE Valve Guide - Big Twin 20-2034C
KIBBLEWHITE
MSRP: $9.84Now: $8.86Was: $9.84Worn valve guides compromise cylinder head integrity and increase oil consumption—a costly problem that cascades into poor compression and engine blow-by. The KIBBLEWHITE Valve Guide 20-2034C...09260753- SKU:
- 09260753
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- PRODUCT NAME:
- VALVE GUIDE
- SIZE IMPERIAL:
- OVERSIZE (+0.004')
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MATERIAL:
- CAST IRON
- INSIDE DIAMETER IMPERIAL:
- 0.3760'
- OUTSIDE DIAMETER IMPERIAL:
- 0.5690'
- RIDING STYLE:
- STREET
MSRP: $9.84Now: $8.86Was: $9.84 -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB661C.STD
KB PERFORMANCE
$322.95If you're running a Twin Cam engine that demands reliable, high-rpm performance, OEM pistons won't cut it. The KB PERFORMANCE Forged Piston Kit delivers the strength and precision needed to handle...09103973- SKU:
- 09103973
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE SIZE IMPERIAL:
- 4.000'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- UNITS:
- KIT
$322.95Qty in Cart: 0Quantity:Price:$322.95Subtotal:
