Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
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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DEL WEST Exhaust Valve DW-RMZ450-EV08
DEL WEST
$155.95When you're pushing your RMZ450 to its limits in competition, valve reliability becomes non-negotiable. DEL WEST's exhaust valves are engineered to withstand the extreme thermal and mechanical...09261063- SKU:
- 09261063
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
$155.95 -
DEL WEST Intake Valve DW-CRF150RIV07
DEL WEST
$155.95Off-road competition demands intake valves that won't compromise under extreme conditions. The DEL WEST Intake Valve DW-CRF150RIV07 delivers the reliability and precision tuning professionals expect,...09262217- SKU:
- 09262217
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
- UNITS:
- EACH
$155.95Qty in Cart: 0Quantity:Price:$155.95Subtotal: -
MOOSE RACING Oil Pump Cover - KTM/Husky T04-5101B
MOOSE RACING
$32.95Engine heat management directly impacts oil viscosity and overall engine longevity—especially in high-performance applications where stock components fall short. The MOOSE RACING Oil Pump Cover...09401936- SKU:
- 09401936
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BASE FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 6061 T-6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- COVER
- COLOR/FINISH:
- ANODIZED
- BASE COLOR:
- BLACK
- COLOR/FINISH:
- MACHINED
- TYPE:
- OIL PUMP
- UNITS:
- EACH
$32.95 -
POWERSTANDS RACING Oil Cap Kit - Black - M18 x 1.5 00-01308-22
POWERSTANDS RACING
$31.95A quality oil cap isn't just a convenience—it's a critical safeguard against contamination and fluid loss under extreme engine conditions. The POWERSTANDS Racing Oil Cap Kit delivers CNC-precision...09500558- SKU:
- 09500558
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CAP KIT
- TYPE:
- OIL FILLER
- DIAMETER - THREAD SIZE IMPERIAL:
- M18 X 1.5
- MATERIAL:
- ALUMINUM
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
POWERSTANDS RACING Oil Cap Kit - Orange - M24 x 3.0 00-01309-28
POWERSTANDS RACING
$31.95A quality oil cap isn't just a closure—it's a seal against contamination and heat loss that directly impacts engine longevity. The POWERSTANDS Racing Oil Cap Kit combines CNC-machined precision with...09500559- SKU:
- 09500559
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- ORANGE
- DIAMETER - THREAD SIZE IMPERIAL:
- M24 X 3.0
- PRODUCT NAME:
- CAP KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILLER
- UNITS:
- KIT
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$31.95Qty in Cart: 0Quantity:Price:$31.95Subtotal: -
POWERSTANDS RACING Oil Cap Kit - Gold - M20 x 1.5 00-01310-23
POWERSTANDS RACING
$31.95A quality oil cap isn't just a seal—it's your first line of defense against leaks, contamination, and engine bay mess during hard driving. The POWERSTANDS Racing Oil Cap Kit combines CNC-precision...09500560- SKU:
- 09500560
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- COLOR/FINISH:
- GOLD
- PRODUCT NAME:
- CAP KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILLER
- UNITS:
- KIT
- COLOR/FINISH:
- ANODIZED
- DIAMETER - THREAD SIZE IMPERIAL:
- M20 X 1.5
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$31.95 -
Pro Filter Oil Filter for 2006-2009 Aprilia RXV 450 PF-563
PRO FILTER
$7.99Keep your RXV 450's engine running clean and protected with the Pro Filter PF-563—engineered to exceed OEM specifications for superior dirt removal and consistent flow rates. A quality oil filter is...07120618- SKU:
- 07120618
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- STYLE:
- PREMIUM
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$7.99 -
Wrench Rabbit Engine Rebuild Kit Suzuki RM85 2002-2004 WR101-068
WRENCH RABBIT
$618.95When a two-stroke engine reaches the end of its service life, a quality rebuild kit is the most cost-effective way to restore full performance and reliability. The Wrench Rabbit Engine Rebuild Kit...09031004- SKU:
- 09031004
- Availability:
- Ships Same Business Day
- Weight:
- 8.75 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$618.95 -
Wrench Rabbit Suzuki RM85 2005-2020 Engine Rebuild Kit WR101-069
WRENCH RABBIT
$618.95Two-stroke engines demand precision rebuilds to maintain peak performance and reliability. The Wrench Rabbit Suzuki RM85 Engine Rebuild Kit delivers all the critical components you need in one...09031005- SKU:
- 09031005
- Availability:
- Ships Same Business Day
- Weight:
- 8.70 LBS
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$618.95Qty in Cart: 0Quantity:Price:$618.95Subtotal: -
XCELDYNE Valve Locks XLOM55761
XCELDYNE
$38.18Valve locks are critical to high-RPM engine stability—inadequate retention leads to catastrophic valve float and potential internal damage. The XCELDYNE XLOM55761 addresses this with...09260529- SKU:
- 09260529
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- VALVE
- UNITS:
- SET OF 4
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- LOCK
$38.18Qty in Cart: 0Quantity:Price:$38.18Subtotal: -
XCELDYNE Valve Spring Locators XSSM13000
XCELDYNE
$52.06Reducing valve train mass is one of the most direct ways to push your engine's RPM ceiling higher while maintaining reliability. These CNC-machined titanium retainers cut weight compared to stock...09260546- SKU:
- 09260546
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPRING LOCATOR
- UNITS:
- 4 PACK
$52.06Qty in Cart: 0Quantity:Price:$52.06Subtotal: -
SHINDY Needle Bearing - 18 mm x 22 mm x 24 mm 10-201
SHINDY
$12.95Piston pin needle bearings are critical to maintaining precise crankshaft-to-connecting rod articulation, directly impacting engine reliability and performance consistency. Worn or damaged needle...NB1453- SKU:
- NB1453
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- OUTSIDE DIAMETER METRIC:
- 22 MM
- TYPE:
- NEEDLE
- OUTSIDE DIAMETER:
- 22 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- APPLICATION:
- PISTON
- LENGTH METRIC:
- 24 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER:
- 18 MM
- INSIDE DIAMETER METRIC:
- 18 MM
- LENGTH:
- 24 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$12.95 -
SHINDY Needle Bearing - 14 mm x 18 mm x 16 mm 10-054
SHINDY
$11.95Piston pin needle bearings are critical to engine reliability, especially in high-RPM applications where precision fit and smooth operation directly impact performance and longevity. The SHINDY...NB1461- SKU:
- NB1461
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- APPLICATION:
- PISTON
- LENGTH METRIC:
- 16 MM
- OUTSIDE DIAMETER:
- 18 MM
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER METRIC:
- 14 MM
- UNITS:
- EACH
- INSIDE DIAMETER:
- 14 MM
- OUTSIDE DIAMETER METRIC:
- 18 MM
- TYPE:
- NEEDLE
- LENGTH:
- 16 MM
$11.95 -
MOOSE RACING Top End Gasket Kit - KX80 810406
MOOSE RACING
$27.72A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a...M810406- SKU:
- M810406
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$27.72Qty in Cart: 0Quantity:Price:$27.72Subtotal: -
MOOSE RACING Top End Gasket Kit - KX/RM60 810407
MOOSE RACING
$23.33A top-end rebuild demands precision gaskets and seals—failure here means lost compression, oil weeping, and compromised performance. The MOOSE RACING Top End Gasket Kit gives you OEM-quality...M810407- SKU:
- M810407
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$23.33 -
MOOSE RACING Top End Gasket Kit - KE 100 810408
MOOSE RACING
$33.51A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent reliability at a...M810408- SKU:
- M810408
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
$33.51 -
MOOSE RACING Top End Gasket Kit - KX 100 810409
MOOSE RACING
$33.51A top-end rebuild demands precision gaskets and seals that won't compromise performance or reliability. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of dealer...M810409- SKU:
- M810409
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$33.51 -
MOOSE RACING Top End Gasket Kit - KX 80 810410
MOOSE RACING
$24.85Whether you're rebuilding after a piston replacement or maintaining peak compression, this gasket kit eliminates the guesswork and cost of sourcing individual seals and gaskets. Moose Racing delivers...M810410- SKU:
- M810410
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$24.85 -
MOOSE RACING Top End Gasket Kit - KX/RM100 810411
MOOSE RACING
$37.29When you're rebuilding a top end, every gasket and seal matters—cheap compromises lead to oil leaks, compression loss, and catastrophic failures. The MOOSE RACING Top End Gasket Kit gives you...M810411- SKU:
- M810411
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$37.29 -
MOOSE RACING Clutch Cover Gasket 817988
MOOSE RACING
$13.64A leaking clutch cover gasket compromises engine sealing and can lead to oil loss and contamination. The MOOSE RACING Clutch Cover Gasket 817988 delivers OEM-equivalent sealing performance at a...09345899- SKU:
- 09345899
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$13.64
