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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WORKS CONNECTION Engine Plug - Black 24-622
WORKS CONNECTION
$46.95Stock engine plugs are functional, but they're visually inconsistent with a precision-built engine bay. The WORKS CONNECTION Engine Plug replaces those OEM placeholders with a purpose-built component...09500905- SKU:
- 09500905
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- PLUG
- MATERIAL:
- 6061 T-6 ALUMINUM
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- ENGINE
- UNITS:
- SET
$46.95 -
WORKS CONNECTION Engine Plug - Green 24-623
WORKS CONNECTION
$46.95Engine bay aesthetics matter when you're serious about your build, and stock plugs have no place on a precision machine. The WORKS CONNECTION Engine Plug delivers clean, professional looks without...09500906- SKU:
- 09500906
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- COLOR/FINISH:
- ANODIZED
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- GREEN
- PRODUCT NAME:
- PLUG
- TYPE:
- ENGINE
- UNITS:
- SET
- MATERIAL:
- 6061 T-6 ALUMINUM
$46.95 -
HELIX Gasket Sheet 403-5014
HELIX
$33.95A quality gasket sheet is the foundation of a leak-free engine assembly. The HELIX Gasket Sheet 403-5014 provides reliable sealing across critical engine surfaces, preventing oil and coolant seepage...09347175- SKU:
- 09347175
- Availability:
- Ships Same Business Day
- Weight:
- 0.49 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- GASKET SHEET
$33.95 -
HELIX Gasket Sheet 403-5016
HELIX
$49.95A quality gasket sheet is fundamental to maintaining reliable engine sealing across your build—whether you're assembling a race engine or rebuilding a high-performance application. The HELIX Gasket...09347176- SKU:
- 09347176
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- PRODUCT NAME:
- GASKET SHEET
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
$49.95 -
WINDEROSA Top End Gasket Kit - Sea Doo 720 610204
WINDEROSA
$55.72A top-end gasket failure in your Sea Doo 720 means coolant leaks, compression loss, and a powerplant that won't perform. The WINDEROSA Top End Gasket Kit delivers OEM-quality sealing with U.S...PD810405- SKU:
- PD810405
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$55.72 -
WINDEROSA Top End Gasket Kit - Sea-Doo 951 610206
WINDEROSA
$139.72A failing top end gasket kit compromises your Sea-Doo 951's compression and invites coolant leaks that cascade into catastrophic engine damage. This WINDEROSA kit delivers OEM-equivalent sealing...PD810415- SKU:
- PD810415
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$139.72 -
WINDEROSA Top End Gasket Kit - Kawasaki 300 611100
WINDEROSA
$54.28A complete top-end gasket failure can sideline your engine and derail your rebuild timeline. This Winderosa kit eliminates the frustration of sourcing individual gaskets by delivering every seal,...PD811303- SKU:
- PD811303
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
$54.28 -
WINDEROSA Complete Gasket Kit with Seals - Polaris 750 611802
WINDEROSA
$130.45Engine gasket failure is one of the quickest ways to lose compression, burn oil, and watch your rebuild go sideways. The WINDEROSA Complete Gasket Kit eliminates guesswork by supplying every critical...PD811384- SKU:
- PD811384
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
- TYPE:
- COMPLETE
$130.45 -
WINDEROSA Top End Gasket Kit - Kawasaki 550 610402
WINDEROSA
$69.97A worn or damaged top-end gasket kit compromises seal integrity, leading to coolant leaks, oil seepage, and potential engine damage. The WINDEROSA 610402 delivers OEM-quality sealing with a complete...PD812326- SKU:
- PD812326
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- TYPE:
- TOP END
$69.97 -
WINDEROSA Top End Gasket Kit - Kawasaki 750 610403
WINDEROSA
$57.55A compromised top end gasket kit will leak, overheat, and destroy an otherwise solid engine build. The WINDEROSA 610403 is a complete OEM-quality solution for Kawasaki 750 rebuilds, eliminating the...PD812361- SKU:
- PD812361
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$57.55 -
WINDEROSA Top End Gasket Kit - Polaris 750 610802
WINDEROSA
$85.62A top-end gasket failure can sideline your Polaris 750 at the worst possible moment. This complete gasket kit from Winderosa covers all critical sealing surfaces—bases, heads, intake, and exhaust—so...PD812384- SKU:
- PD812384
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$85.62 -
WINDEROSA Top End Gasket Kit - Sea-Doo 610201
WINDEROSA
$54.30A top-end gasket kit is essential maintenance for any Sea-Doo engine running hard—whether you're rebuilding after high hours or preventing mid-season failures. WINDEROSA's 610201 kit delivers...PD812435- SKU:
- PD812435
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
$54.30 -
WINDEROSA Top End Gasket Kit - Yamaha 650 610119
WINDEROSA
$62.78A top-end gasket kit is essential for restoring cylinder head sealing integrity and preventing coolant or oil leakage that compromises engine reliability. Whether you're rebuilding after high-mileage...PD812500- SKU:
- PD812500
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$62.78 -
WORKS CONNECTION Dipstick - Red 24-216
WORKS CONNECTION
$46.95A quality dipstick might seem like a small detail, but it's critical for engine health—especially in high-performance applications where oil levels directly impact bearing protection and cooling...09500852- SKU:
- 09500852
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE COLOR:
- RED
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- DIPSTICK
- TYPE:
- OIL
- UNITS:
- EACH
- COLOR/FINISH:
- RED
$46.95 -
WORKS CONNECTION Engine Plug - Red 24-492
WORKS CONNECTION
$31.95Stock engine plugs are functional but uninspired—they're prone to corrosion and detract from an otherwise meticulous build. The WORKS CONNECTION Engine Plug set replaces those eyesores with...09500855- SKU:
- 09500855
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- MATERIAL:
- 6061 T-6 ALUMINUM
- COLOR/FINISH:
- RED
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- COLOR/FINISH:
- ANODIZED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$31.95 -
WINDEROSA Water Pump Repair - Kit 621214
WINDEROSA
$57.55A failing water pump can leave you stranded mid-race or mid-project, compromising engine cooling and risking catastrophic damage. The WINDEROSA 621214 repair kit gives you OEM-equivalent seals,...09320256- SKU:
- 09320256
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$57.55 -
WINDEROSA Water Pump Repair - Kit 721322
WINDEROSA
$58.45A failing water pump can compromise engine cooling efficiency and lead to catastrophic overheating—especially under high-performance conditions or extended track sessions. The WINDEROSA Water Pump...09320257- SKU:
- 09320257
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
$58.45 -
WINDEROSA Water Pump Seal 503010
WINDEROSA
$37.10A failing water pump seal is one of the most common sources of coolant leaks in high-performance engines, and addressing it quickly prevents catastrophic overheating during competition or spirited...09320259- SKU:
- 09320259
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- EACH
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- WATER PUMP
$37.10 -
WINDEROSA Complete Gasket Kit - JS750SS/XI-R 611407
WINDEROSA
$95.95Engine gasket failure can compromise your entire drivetrain and lead to costly downtime. The WINDEROSA Complete Gasket Kit delivers OEM-equivalent sealing across all critical engine junction points,...09340266- SKU:
- 09340266
- Availability:
- Ships Same Business Day
- Weight:
- 0.59 LBS
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
$95.95 -
WINDEROSA Complete Gasket Kit - Sea-Doo 611209
WINDEROSA
$110.12A complete gasket kit is essential maintenance for any Sea-Doo engine rebuild or major service. Worn or degraded gaskets lead to fluid leaks, compression loss, and premature engine wear—problems that...09340514- SKU:
- 09340514
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- COMPLETE
$110.12
