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
-
MOOSE RACING Water Pump Rebuild Kit 821213
MOOSE RACING
$38.48A failing water pump can sideline your engine and compromise cooling system integrity—this MOOSE RACING rebuild kit gives you everything needed to restore your pump to OEM specifications without...09345179- SKU:
- 09345179
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$38.48 -
MOOSE RACING Water Pump Rebuild Kit 821233
MOOSE RACING
$53.09A failing water pump can compromise your entire cooling system, leaving you stranded trackside or worse. This MOOSE RACING rebuild kit supplies every gasket, seal, bearing, and O-ring needed to...09345181- SKU:
- 09345181
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$53.09 -
MOOSE RACING Water Pump Rebuild Kit 821243
MOOSE RACING
$52.37A failing water pump doesn't just reduce cooling efficiency—it can cause catastrophic engine damage in minutes. This MOOSE RACING rebuild kit gives you all the OEM-quality components needed to...09345182- SKU:
- 09345182
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$52.37 -
MOOSE RACING Water Pump Rebuild Kit 821259
MOOSE RACING
$40.88A failing water pump can sideline your engine and compromise cooling system integrity—exactly what you can't afford during competition or demanding track sessions. This MOOSE RACING rebuild kit gives...09345184- SKU:
- 09345184
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$40.88 -
MOOSE RACING Motor Gasket Kit with Seal - KTM360/380 811307
MOOSE RACING
$92.89A complete engine and transmission rebuild demands gaskets and seals that fit precisely and last through countless heat cycles. The MOOSE RACING Motor Gasket Kit eliminates the frustration of...09340110- SKU:
- 09340110
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
$92.89 -
MOOSE RACING Motor Seals - RM85 822176
MOOSE RACING
$30.56Engine rebuild projects demand reliability at every seal and gasket—compromised seals lead to oil leaks, contamination, and premature failure. The MOOSE RACING Motor Seals kit eliminates the...M822176- SKU:
- M822176
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
$30.56 -
MOOSE RACING Motor Seals - CRF450 822178
MOOSE RACING
$59.71Engine and transmission seals are critical wear items that demand precision and reliability—especially when you're rebuilding or maintaining high-performance equipment. MOOSE RACING Motor Seals...M822178- SKU:
- M822178
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- OIL
- APPLICATION:
- ENGINE
- UNITS:
- SET
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
$59.71 -
MOOSE RACING Complete Motor Gasket Kit - CR500 808273
MOOSE RACING
$81.27A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise reliability or performance. The MOOSE RACING Complete Motor Gasket Kit eliminates the frustration...M808273- SKU:
- M808273
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$81.27 -
MOOSE RACING Complete Motor Gasket Kit - KLR110/DRZ110 808415
MOOSE RACING
$71.55A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under load. The MOOSE RACING Complete Motor Gasket Kit eliminates the frustration of sourcing individual...09340131- SKU:
- 09340131
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$71.55 -
MOOSE RACING Complete Motor Gasket Kit - KX/RM100 808411
MOOSE RACING
$62.78A complete engine rebuild demands precision gaskets and seals that won't compromise your motor's integrity or your wallet. This Moose Racing kit eliminates the guesswork of sourcing individual...M808411- SKU:
- M808411
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- UNITS:
- KIT
$62.78 -
MOOSE RACING Ignition Cover Gasket 816058
MOOSE RACING
$11.65A compromised ignition cover gasket can lead to oil seepage, contamination, and potential engine damage—precisely why OEM-quality replacement is non-negotiable for serious builders. The MOOSE RACING...09340570- SKU:
- 09340570
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$11.65 -
On Sale
VESRAH Exhaust Valve GG-1014-EX
VESRAH
MSRP: $23.50Now: $22.33Was: $23.50A precision exhaust valve is critical to your engine's breathing efficiency—poor valve sealing directly impacts horsepower, fuel economy, and combustion reliability. The VESRAH GG-1014-EX delivers...GG1014EX- SKU:
- GG1014EX
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- STEM DIAMETER METRIC:
- 5.50 MM
- APPLICATION:
- EXHAUST
- HEAD DIAMETER:
- 25,00 MM
- PRODUCT NAME:
- VALVE
- HEAD DIAMETER METRIC:
- 25.00 MM
- LENGTH METRIC:
- 91.50 MM
- UNITS:
- EACH
- RIDING STYLE:
- STREET
MSRP: $23.50Now: $22.33Was: $23.50 -
On Sale
VESRAH Complete Gasket Kit - Z50 R VG-1006
VESRAH
MSRP: $47.95Now: $45.55Was: $47.95A complete engine rebuild demands precision sealing at every junction—and this VESRAH gasket kit eliminates the guesswork by including every gasket, o-ring, and valve guide oil seal you need for a...VG1006- SKU:
- VG1006
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
MSRP: $47.95Now: $45.55Was: $47.95 -
MOOSE RACING Ignition Cover Gasket 816692
MOOSE RACING
$11.64A worn or compromised ignition cover gasket compromises engine sealing and can lead to oil seepage, contamination, and potential ignition system failure. The MOOSE Racing Ignition Cover Gasket 816692...09346162- SKU:
- 09346162
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
$11.64 -
MOOSE RACING Ignition Cover Gasket 816721
MOOSE RACING
$8.83A quality ignition cover gasket is critical to preventing oil seepage and maintaining proper engine sealing—especially in high-performance applications where heat and vibration accelerate gasket...09346163- SKU:
- 09346163
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
$8.83 -
MOOSE RACING Ignition Cover Gasket 816736
MOOSE RACING
$8.29A compromised ignition cover gasket can lead to oil seepage, contamination of ignition components, and potential electrical failures—exactly what you don't want mid-race or mid-season. The MOOSE...09346165- SKU:
- 09346165
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- TYPE:
- IGNITION COVER
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$8.29 -
MOOSE RACING Top End Gasket Kit 8100009
MOOSE RACING
$70.36A top-end rebuild demands precision and reliability—this gasket kit delivers both without the OEM price tag. Engineered with high-tech materials and manufactured to exact tolerances, you get the...09346442- SKU:
- 09346442
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$70.36 -
MOOSE RACING Top End Gasket Kit - Yamaha 8100022
MOOSE RACING
$29.19A top-end gasket kit is essential when rebuilding your engine or replacing pistons—it ensures proper sealing at every critical junction and prevents oil leaks, combustion bypass, and premature wear...09346443- SKU:
- 09346443
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$29.19 -
MOOSE RACING Top End Gasket Kit - Kawasaki 8100023
MOOSE RACING
$87.56A top-end rebuild demands precision-matched components that won't compromise reliability or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and gaskets at a fraction of...09346444- SKU:
- 09346444
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
$87.56 -
MOOSE RACING Top End Gasket Kit - KTM 8100024
MOOSE RACING
$43.01A top-end rebuild demands precision-matched components that won't compromise engine integrity or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and gaskets at a fraction...09346445- SKU:
- 09346445
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
$43.01
