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
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EASTERN MOTORCYCLE PARTS Bearing - Blue A-24647-87
EASTERN MOTORCYCLE PARTS
$55.95Bearing failures compromise your bike's reliability and performance—this Eastern Motorcycle Parts bearing restores OEM-spec precision with proven durability. Built with caged construction to maintain consistent rolling resistance and heat dissipation,...09240265- SKU:
- 09240265
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROLLER
- UNITS:
- EACH
- APPLICATION:
- PINION SHAFT
- PRODUCT NAME:
- BEARING
$55.95 -
EASTERN MOTORCYCLE PARTS Pinion Bearing A-24658-87
EASTERN MOTORCYCLE PARTS
$34.95Pinion bearings are critical load-bearing components that directly affect drivetrain reliability and performance longevity. A worn or damaged pinion bearing compromises your rear differential's ability to handle power delivery, increasing friction and...09240267- SKU:
- 09240267
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- APPLICATION:
- PINION SHAFT
$34.95 -
EASTERN MOTORCYCLE PARTS Cam Cover Bushing A-25581-70+5
EASTERN MOTORCYCLE PARTS
$38.95A worn or damaged cam cover bushing compromises engine seal integrity and can lead to oil leakage, increased wear on surrounding components, and potential engine damage over time. This OEM-quality replacement restores proper fitment and durability to...09240272- SKU:
- 09240272
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- SIZE IMPERIAL:
- OVERSIZE (+0.005')
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
$38.95 -
EASTERN MOTORCYCLE PARTS Tappet - Standard - Big Twin A-18492-48
EASTERN MOTORCYCLE PARTS
$132.95Precision valve train control starts with a reliable tappet. The EASTERN MOTORCYCLE PARTS Standard Tappet is engineered to maintain consistent valve clearance and smooth operation across your Big Twin engine's demanding duty cycle. OEM-quality...09290019- SKU:
- 09290019
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- SIZE IMPERIAL:
- STANDARD
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- TAPPET
- SIZE:
- STANDARD
$132.95 -
EASTERN MOTORCYCLE PARTS Tappet - .005 - Big Twin A-18492-78
EASTERN MOTORCYCLE PARTS
$130.95Precise valve clearance is critical to Big Twin engine performance and longevity, and worn or incorrect tappets can lead to valve float, improper seating, and costly damage. This Eastern Motorcycle Parts tappet delivers exact .005" clearance...09290020- SKU:
- 09290020
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- SIZE IMPERIAL:
- OVERSIZE (+0.005')
- PRODUCT NAME:
- TAPPET
- SIZE:
- OVERSIZE (+0,005')
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$130.95 -
EASTERN MOTORCYCLE PARTS Tappet - Standard - XL A-18508-52B
EASTERN MOTORCYCLE PARTS
$114.95A properly functioning tappet is essential to maintaining precise valve timing and preventing costly engine damage. Eastern Motorcycle Parts' standard tappet ensures reliable clearance adjustment and consistent performance across operating conditions...09290021- SKU:
- 09290021
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- RIDING STYLE:
- STREET
- SIZE:
- STANDARD
- PRODUCT NAME:
- TAPPET
- UNITS:
- EACH
$114.95 -
EASTERN MOTORCYCLE PARTS Rocker Arm Lock Nut V-13-241
EASTERN MOTORCYCLE PARTS
$18.95Rocker arm lock nuts are critical fasteners that prevent vibration-induced loosening during high-RPM operation—a failure point that can lead to catastrophic valve train damage. This Eastern Motorcycle Parts lock nut delivers the secure clamping force...09270031- SKU:
- 09270031
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- ROCKER ARM
- RIDING STYLE:
- STREET
- TYPE:
- LOCK
- UNITS:
- 4 PACK
- PRODUCT NAME:
- NUT
$18.95 -
EASTERN MOTORCYCLE PARTS Rocker Arm Shims - .007" A-6767
EASTERN MOTORCYCLE PARTS
$8.00Proper valve clearance is critical to engine performance, reliability, and longevity—and rocker arm shims are your precision tool for achieving exact specifications. The Eastern Motorcycle Parts A-6767 shim delivers the tight tolerances your engine...09270006- SKU:
- 09270006
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- EXHAUST
- MOUNTING POSITION:
- FRONT
- TYPE:
- ROCKER ARM
- APPLICATION:
- INTAKE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- SIZE:
- 0,007'
- SIZE IMPERIAL:
- 0.007'
- UNITS:
- 10 PACK
$8.00 -
EASTERN MOTORCYCLE PARTS Rocker Arm Shims - .005" A-6767A
EASTERN MOTORCYCLE PARTS
$8.00Rocker arm shims are critical for maintaining precise valve clearance and ensuring optimal engine performance across temperature cycles. Running incorrect clearance leads to valve float, reduced compression, and potential catastrophic engine damage...09270007- SKU:
- 09270007
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- EXHAUST
- SIZE IMPERIAL:
- 0.005'
- TYPE:
- ROCKER ARM
- MOUNTING POSITION:
- FRONT
- UNITS:
- 10 PACK
- PRODUCT NAME:
- SHIM
- SIZE:
- 0,005'
- APPLICATION:
- INTAKE
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
$8.00 -
EASTERN MOTORCYCLE PARTS Rocker Arm Shims - .015" A-6767B
EASTERN MOTORCYCLE PARTS
$8.00Proper valve clearance is critical to engine performance, and worn rocker arm shims compromise both reliability and power output. The EASTERN MOTORCYCLE PARTS Rocker Arm Shims (.015") restore precise valve timing and eliminate excessive wear on your...09270008- SKU:
- 09270008
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- MOUNTING POSITION:
- FRONT
- APPLICATION:
- EXHAUST
- SIZE:
- 0,015'
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- SHIM
- RIDING STYLE:
- STREET
- SIZE IMPERIAL:
- 0.015'
- TYPE:
- ROCKER ARM
- UNITS:
- 10 PACK
$8.00 -
EASTERN MOTORCYCLE PARTS Rocker Arm Spacers A-17452-66
EASTERN MOTORCYCLE PARTS
$14.80Rocker arm spacers are critical for maintaining precise valve train geometry and ensuring consistent performance across your engine's RPM range. Improper valve clearance leads to loss of power, increased wear on valve seats, and potential engine...09270009- SKU:
- 09270009
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- EXHAUST
- APPLICATION:
- INTAKE
- MOUNTING POSITION:
- FRONT
- PRODUCT NAME:
- SPACER
- UNITS:
- 4 PACK
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- REAR
- TYPE:
- ROCKER ARM SHAFT
$14.80 -
EASTERN MOTORCYCLE PARTS Rocker Shaft Spacers A-17451-57
EASTERN MOTORCYCLE PARTS
$9.40Rocker shaft spacers are critical for maintaining proper valve train geometry and preventing excessive wear on your cylinder head. Incorrect spacing leads to binding, misalignment, and premature failure of your rocker assembly. Eastern Motorcycle Parts'...09270011- SKU:
- 09270011
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- SPACER
- TYPE:
- ROCKER ARM SHAFT
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$9.40 -
EASTERN MOTORCYCLE PARTS Rocker Shaft Washers A-17450-73
EASTERN MOTORCYCLE PARTS
$6.70Rocker shaft washers are critical wear components that maintain proper valve train geometry and prevent costly bearing damage. Over time, these washers compress and degrade, leading to increased valve lash, poor sealing, and accelerated wear on your...09270013- SKU:
- 09270013
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- WASHER
- TYPE:
- ROCKER ARM SHAFT
- APPLICATION:
- EXHAUST
- MOUNTING POSITION:
- FRONT
- UNITS:
- 10 PACK
$6.70 -
EASTERN MOTORCYCLE PARTS Rocker Arm Washers A-6466
EASTERN MOTORCYCLE PARTS
$8.10Rocker arm washers are a critical maintenance item that's often overlooked until valve train noise or rocker shaft loosening becomes a problem. These A-6466 washers distribute clamping force evenly under the rocker shaft nuts, preventing the shaft from...09270025- SKU:
- 09270025
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MOUNTING POSITION:
- REAR
- PRODUCT NAME:
- WASHER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- APPLICATION:
- INTAKE
- TYPE:
- ROCKER ARM SHAFT
- APPLICATION:
- EXHAUST
- MOUNTING POSITION:
- FRONT
$8.10 -
EASTERN MOTORCYCLE PARTS Oil Pump Drive Gear A-26349-54
EASTERN MOTORCYCLE PARTS
$41.95A properly functioning oil pump drive gear is critical to maintaining consistent oil pressure and protecting your engine from catastrophic wear. This EASTERN MOTORCYCLE PARTS gear ensures reliable lubrication delivery to every bearing and journal,...09320033- SKU:
- 09320033
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- TYPE:
- OIL PUMP
- PRODUCT NAME:
- DRIVE GEAR
- RIDING STYLE:
- STREET
$41.95 -
On Sale
EASTERN MOTORCYCLE PARTS Oil Pump Drive Gear A-26349-84
EASTERN MOTORCYCLE PARTS
MSRP: $37.95Now: $24.00Was: $37.95A reliable oil pump drive gear is critical to maintaining consistent oil pressure and engine protection under racing conditions. This EASTERN MOTORCYCLE PARTS gear ensures precise meshing with your oil pump shaft, preventing slippage and gear wear that...09320034- SKU:
- 09320034
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- DRIVE GEAR
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
MSRP: $37.95Now: $24.00Was: $37.95 -
EASTERN MOTORCYCLE PARTS Rod Bearings - +.002" B-EV-7
EASTERN MOTORCYCLE PARTS
$21.95Precision rod bearings are critical to engine longevity and reliability, especially in high-revving or forced induction applications. The Eastern Motorcycle Parts +.002" B-EV-7 bearings deliver consistent oil clearance and load capacity for engines that...09240480- SKU:
- 09240480
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- CONNECTING ROD
- PRODUCT NAME:
- BEARING
- OUTSIDE DIAMETER IMPERIAL:
- OVERSIZE (+0.002')
- TYPE:
- ROLLER
- UNITS:
- SET
- RIDING STYLE:
- STREET
$21.95 -
EASTERN MOTORCYCLE PARTS Bearing A-8905
EASTERN MOTORCYCLE PARTS
$31.95A worn or damaged mainshaft bearing compromises your Big Twin's reliability and can cascade into catastrophic engine failure. The Eastern Motorcycle Parts A-8905 is a direct OEM replacement engineered to restore factory specifications and ensure smooth...09240586- SKU:
- 09240586
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- BEARING
- TYPE:
- OPEN END
$31.95 -
EASTERN MOTORCYCLE PARTS Shaft Sprocket A-24001-72
EASTERN MOTORCYCLE PARTS
$181.95Precision shaft sprockets are critical to reliable power transmission in high-demand applications—any wobble, misalignment, or material failure cascades into catastrophic drivetrain damage. The EASTERN MOTORCYCLE PARTS Shaft Sprocket A-24001-72 is...09220133- SKU:
- 09220133
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SPROCKET SHAFT
$181.95 -
EASTERN MOTORCYCLE PARTS Right Pinion Bearing A-24623-99B
EASTERN MOTORCYCLE PARTS
$64.95A quality right pinion bearing is critical to maintaining smooth drivetrain operation and extending the life of your rear differential assembly. This Eastern Motorcycle Parts bearing is engineered to precise tolerances, ensuring reliable performance...09240122- SKU:
- 09240122
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- APPLICATION:
- PINION SHAFT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$64.95
