Harley Crankcases and Parts
Harley Bike Crankcases & Parts at JJ Motorsports
Rebuild or upgrade your Harley’s bottom end with premium crankcase components from JJ Motorsports, featuring lock kits, breather filters, and precision pinion shafts for reliable performance on Big Twin, Evo, Twin Cam, and Shovelhead engines. These high-quality parts ensure proper alignment, breathing, and durability.
Shop Eastern Motorcycle Parts, EMGO, and JIMS crankcase parts for proven reliability. Explore related categories such as Harley engine for bearings and flywheels, or Harley for oil pumps and cams to complete your bottom-end rebuild.
Top Harley Crankcase & Parts
- Eastern Motorcycle Parts Crankpin Nut Lock Kit A-23966-78 – Complete lock kit for crankpin nuts; essential for flywheel assembly on Evo and Twin Cam.
- EMGO Crankcase Filter Kit 14-20910 – Breather filter kit with mounting hardware; improves crankcase ventilation on Sportster and Big Twin.
- JIMS Pinion Gear Shaft Big Twin 24006-54A – Precision pinion shaft for 1954-1999 Big Twin; heat-treated for maximum strength and perfect gear mesh.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
EASTERN MOTORCYCLE PARTS Dowel Pins A-16574-99
EASTERN MOTORCYCLE PARTS
$9.40Precision dowel pins are critical fastening components in high-stress crankcase and transmission assemblies—misalignment or pin failure can compromise case integrity and power delivery. Eastern Motorcycle Parts A-16574-99 dowels provide the repeatability...09200067- SKU:
- 09200067
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- DOWEL PIN
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$9.40 -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9110
EASTERN MOTORCYCLE PARTS
$14.80Bearing spacers are critical wear items that maintain proper wheel alignment and reduce friction in your motorcycle's bearing assembly. Over time, factory spacers compress and wear, leading to play in the wheel hub and compromised handling. This 5-pack...09200068- SKU:
- 09200068
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.0895' - 0.0905'
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BEARING SPACER
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- 5 PACK
$14.80 -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9123
EASTERN MOTORCYCLE PARTS
$14.80Bearing spacers are critical wear components that maintain proper axle alignment and reduce friction in your wheel bearings—neglecting them leads to premature bearing failure and costly rebuilds. The EASTERN MOTORCYCLE PARTS A-9123 5-pack delivers...09200072- SKU:
- 09200072
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- BEARING SPACER
- UNITS:
- 5 PACK
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.0975' - 0.0985'
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
$14.80 -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9125
EASTERN MOTORCYCLE PARTS
$14.80Bearing spacers are critical components that maintain proper wheel alignment and reduce radial play in your motorcycle's wheel bearings. Worn or damaged spacers lead to premature bearing failure, wobbling wheels, and compromised handling—exactly what you...09200073- SKU:
- 09200073
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.1015' - 0.1025'
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- 5 PACK
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BEARING SPACER
$14.80 -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9126
EASTERN MOTORCYCLE PARTS
$14.80Bearing spacers are critical components that maintain precise wheel alignment and reduce axial play in your motorcycle's wheel bearings. Worn or missing spacers lead to premature bearing wear, increased friction, and compromised handling—issues that...09200074- SKU:
- 09200074
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- UNITS:
- 5 PACK
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- BASE FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.1035' - 0.1045'
- PRODUCT NAME:
- BEARING SPACER
$14.80Qty in Cart: 0Quantity:Price:$14.80Subtotal: -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9127
EASTERN MOTORCYCLE PARTS
$14.80Bearing spacers are critical components that maintain precise axle alignment and wheel bearing preload—factors that directly impact handling, tire wear, and overall safety. Worn or incorrect spacers can introduce play in your wheel bearings, leading to...09200075- SKU:
- 09200075
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- CHROME
- BASE FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.1055' - 0.1065'
- PRODUCT NAME:
- BEARING SPACER
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- 5 PACK
$14.80 -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9128
EASTERN MOTORCYCLE PARTS
$15.50Bearing spacers are critical for maintaining proper wheel alignment and suspension geometry—neglecting them leads to accelerated bearing wear, uneven tire degradation, and compromised handling. The EASTERN MOTORCYCLE PARTS A-9128 5-pack delivers...09200076- SKU:
- 09200076
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.1075' - 0.1085'
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BEARING SPACER
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- 5 PACK
$15.50 -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9129
EASTERN MOTORCYCLE PARTS
$14.80Bearing spacers are critical for maintaining proper wheel alignment, reducing lateral play, and preventing premature bearing wear in high-stress riding conditions. Using OEM-quality replacements ensures your wheels track true and your bearings operate at...09200077- SKU:
- 09200077
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- BEARING SPACER
- UNITS:
- 5 PACK
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.1095' - 0.1105'
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
$14.80 -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9130
EASTERN MOTORCYCLE PARTS
$14.80Worn or degraded bearing spacers compromise wheel alignment, increase drag, and accelerate bearing wear—ultimately compromising safety and performance. The EASTERN MOTORCYCLE PARTS Bearing Spacers (A-9130) restore proper bearing preload and axle geometry...09200078- SKU:
- 09200078
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.1115' - 0.1125'
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BEARING SPACER
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- 5 PACK
$14.80 -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9132
EASTERN MOTORCYCLE PARTS
$15.50Bearing spacers are critical for maintaining proper wheel alignment and reducing lateral play in your motorcycle's hub assembly. Without quality spacers, you'll experience accelerated bearing wear, wobbling wheels, and compromised handling—especially...09200080- SKU:
- 09200080
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.1155' - 0.1165'
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- 5 PACK
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BEARING SPACER
$15.50 -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9133
EASTERN MOTORCYCLE PARTS
$14.80Bearing spacers are critical wear items that maintain precise wheel alignment and reduce radial play in your motorcycle's wheel bearings. Worn or damaged spacers compromise handling predictability and accelerate bearing degradation, making replacement...09200081- SKU:
- 09200081
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.1175' - 0.1185'
- RIDING STYLE:
- STREET
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BEARING SPACER
- TYPE:
- CRANKCASE
- UNITS:
- 5 PACK
$14.80 -
EASTERN MOTORCYCLE PARTS Bearing Spacers - 5 pack A-9134
EASTERN MOTORCYCLE PARTS
$14.80Bearing spacers are critical for maintaining proper wheel alignment and reducing side-to-side play in your wheel bearings—neglecting them leads to premature bearing wear and handling inconsistencies. These OEM-spec Eastern Motorcycle Parts spacers ensure...09200082- SKU:
- 09200082
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- COLOR/FINISH:
- CHROME
- DIAMETER - THREAD SIZE IMPERIAL:
- 0.1195' - 0.1205'
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- BEARING SPACER
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- UNITS:
- 5 PACK
$14.80 -
EASTERN MOTORCYCLE PARTS Dowel Pins V13-205
EASTERN MOTORCYCLE PARTS
$13.40Dowel pins are critical alignment components that maintain precise positioning between engine block sections, cylinder heads, and transmission housings. Worn or missing dowel pins compromise structural integrity and can lead to misalignment, fluid leaks,...09200089- SKU:
- 09200089
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- FEATURES:
- SIZE IS .394' X .375' L
- PRODUCT NAME:
- DOWEL PIN
- UNITS:
- 10 PACK
$13.40 -
EASTERN MOTORCYCLE PARTS Dowel Pins V-13-210
EASTERN MOTORCYCLE PARTS
$17.50Dowel pins are critical precision components that ensure proper alignment and indexing in engine assembly and structural applications. Using OEM-specification replacements like the Eastern Motorcycle Parts V-13-210 prevents misalignment, maintains...09200090- SKU:
- 09200090
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- FEATURES:
- SIZE IS .374' X .400' L
- PRODUCT NAME:
- DOWEL PIN
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$17.50 -
EASTERN MOTORCYCLE PARTS Dowel Pins A-24754-75A
EASTERN MOTORCYCLE PARTS
$22.90Dowel pins are critical alignment components that keep your engine internals, transmission, and case assemblies precisely positioned during assembly and operation. Worn or missing dowel pins compromise structural integrity and can lead to catastrophic...09200123- SKU:
- 09200123
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- DOWEL PIN
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- FEATURES:
- SIZE IS .434' X .500' L
$22.90 -
EASTERN MOTORCYCLE PARTS Clutch Hub Bearing Rollers A-9540A
EASTERN MOTORCYCLE PARTS
$11.95Clutch hub bearing rollers are critical wear components that directly impact clutch engagement smoothness and overall drivetrain reliability. A worn or damaged set will cause sluggish lever response, inconsistent power delivery, and premature clutch...DS195005- SKU:
- DS195005
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- BEARING ROLLER
- TYPE:
- CLUTCH HUB
- UNITS:
- 20 PACK
$11.95 -
EASTERN MOTORCYCLE PARTS Engine Sprocket Nut A-24003-55
EASTERN MOTORCYCLE PARTS
$12.95If you're converting to a belt-drive system or streamlining your engine's drivetrain by eliminating compensating sprockets, you need a sprocket nut that delivers absolute reliability under load. The EASTERN MOTORCYCLE PARTS Engine Sprocket Nut A-24003-55...DS194074- SKU:
- DS194074
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- MOTOR SPROCKET
- PRODUCT NAME:
- NUT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$12.95 -
EASTERN MOTORCYCLE PARTS Left Side Crankcase Bushing A-24621-40
EASTERN MOTORCYCLE PARTS
$114.95Crankcase bushings are critical wear items that directly impact engine longevity and reliability. A degraded bushing compromises crankshaft alignment, leading to increased friction, vibration, and accelerated bearing wear. The EASTERN MOTORCYCLE PARTS...DS194098- SKU:
- DS194098
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- BUSHING
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
$114.95 -
DRAG SPECIALTIES Crankcase Vent Replacement Filter 35-0312A-BC142
DRAG SPECIALTIES
$20.55A properly functioning crankcase vent system is critical for engine longevity and performance. Clogged or degraded filters restrict blow-by gases, leading to increased pressure buildup, oil leaks, and potential engine damage. This replacement filter from...DS289516- SKU:
- DS289516
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- BASE COLOR:
- SILVER
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- ALUMINUM
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- PRODUCT NAME:
- VENT FILTER
- TYPE:
- CHROME TOP
$20.55 -
DRAG SPECIALTIES Crankcase Vent Replacement Filter 35-0313-BC104
DRAG SPECIALTIES
$20.55A properly functioning crankcase ventilation system is essential for engine longevity and reliable performance. This DRAG SPECIALTIES replacement filter prevents oil vapor and contaminants from entering your intake manifold, protecting critical engine...DS289517- SKU:
- DS289517
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- ALUMINUM
- BASE COLOR:
- BLACK
- BASE COLOR:
- SILVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- VENT FILTER
- TYPE:
- RUBBER TOP
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
$20.55Qty in Cart: 0Quantity:Price:$20.55Subtotal:
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Engine Crankcases and Parts
- Compatibility: Ensure crankcases and parts fit your Harley's engine type (e.g., Twin Cam, Evo, Big Twin, M8) and model (e.g., Softail, Dyna, Touring). Use the vehicle selector for year-specific matches (e.g., 1984-1999 Evo, 1999-2017 Twin Cam) to avoid assembly or fit issues.
- Type of Use: For standard rebuilds, opt for OEM-style crankcases; high-performance engines benefit from S&S V-Series for increased displacement (e.g., 100ci to 124ci) and power in demanding riding conditions.
- Components and Upgrades: Select crankcases with pre-installed bearings/seals or parts like snap rings, pinion bearings, and spacers. Upgrade to kits with high-strength materials for better oil flow and durability.
- Brand and Quality: Choose S&S Cycle for premium V-Series crankcases with forged internals or Drag Specialties for affordable bearings and spacers. Prioritize USA-made billet aluminum or steel for heat resistance and longevity.
- Installation and Cost: Crankcases require professional installation; parts like bearings are DIY-friendly. Prices range from $4.95 for snap rings to $3,295.95 for premium crankcases—factor in free shipping over $99 and expert support for value.
Frequently Asked Questions (FAQs)
- What Harley models and engines do these crankcases and parts support? Parts support models like Softail, Dyna, Touring with Evo (1984-1999), Twin Cam (1999-2017), and M8 engines—use the year/make/model filter for exact compatibility.
- How do upgraded crankcases improve performance? Designs like S&S V-Series provide increased displacement, better oil flow, and forged internals for higher horsepower and smoother operation.
- What is typically included in a crankcase kit? Kits include crankcases with pre-installed bearings/seals and hardware; parts like pinion bearings or spacers are sold separately—check details for inclusions.
- Are these parts durable for high-mileage? Yes, with high-strength materials and precision machining, they withstand high loads and extend engine life.
- What if a part doesn't fit my Harley? Verify engine type, bore size, and model before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related engine parts? Yes—explore pistons/rings, gaskets, or cams in the Harley engine category to complement your crankcase upgrade for a full rebuild.
