Dirt Bike Engine
Explore our selection for dirt bike parts for adding horsepower or reliability to a dirt bike's engine. We feature engine parts from Wiseco, Vertex, and more common engine part manufacturers. Get new pistons and gasket kits for re-freshening engines to withstand any conditions you put your bike through!
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Dirt Bike Cams and Parts
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Dirt Bike Connecting Rods and Parts
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Dirt Bike Crankcases and Parts
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Dirt Bike Crankshafts and Parts
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Dirt Bike Cylinder Heads and Parts
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Dirt Bike Cylinders and Parts
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Dirt Bike Engine Bearings
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Dirt Bike Engine Covers
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Dirt Bike Engine Gaskets and Kits
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Dirt Bike Engine Rebuild Kits
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Dirt Bike Engine Seals - Orings and Kits
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Dirt Bike Engine Valves and Parts
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Dirt Bike Flywheel and Rod Assemblies
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Dirt Bike Fuel Filters
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Dirt Bike Miscellaneous Engine Parts
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Dirt Bike Oil Coolers
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Dirt Bike Oil Filters
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Dirt Bike Oil Lines
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Dirt Bike Oil Pumps
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Dirt Bike Piston and Ring Kits
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Dirt Bike Piston Rings Only
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Dirt Bike Wrist Pins and Circlips
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- Price
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On Sale
ATHENA Top End Gasket Kit P400510600034
ATHENA
MSRP: $20.95Now: $18.86Was: $20.95ATHENA Top End Gasket Kit P400510600034Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race gas with...9340210- SKU:
- 9340210
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- 2-STROKE
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $20.95Now: $18.86Was: $20.95 -
On Sale
ATHENA Top End Gasket Kit P400510600035
ATHENA
MSRP: $40.95Now: $36.86Was: $40.95ATHENA Top End Gasket Kit P400510600035Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race gas with...9340211- SKU:
- 9340211
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- ENGINE TYPE:
- 2-STROKE
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
MSRP: $40.95Now: $36.86Was: $40.95 -
On Sale
ATHENA Complete Gasket Kit - Yamaha P400485850053
ATHENA
MSRP: $155.95Now: $140.36Was: $155.95ATHENA Complete Gasket Kit Yamaha P400485850053Superior-quality gasket sets from Athena, Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high springback and superior...9340213- SKU:
- 9340213
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $155.95Now: $140.36Was: $155.95 -
On Sale
ATHENA Complete Gasket Kit - KTM P400270850003
ATHENA
MSRP: $26.95Now: $24.26Was: $26.95ATHENA Complete Gasket Kit KTM P400270850003Superior-quality gasket sets from Athena, Head gaskets feature rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core materials feature high springback and superior...9340216- SKU:
- 9340216
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- -
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
MSRP: $26.95Now: $24.26Was: $26.95 -
On Sale
ATHENA Cylinder Kit - CRF230F P400210100054
ATHENA
MSRP: $348.95Now: $314.06Was: $348.95ATHENA Cylinder Kit CRF230F P400210100054Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All...9310662- SKU:
- 9310662
- Availability:
- Ships Same Business Day
- Weight:
- 4.75 LBS
- STYLE:
- BIG BORE
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 4-STROKE
- BORE SIZE METRIC:
- 67.00 MM
- MATERIAL:
- ALUMINUM
- DISPLACEMENT:
- 233 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $348.95Now: $314.06Was: $348.95Qty in Cart: 0Quantity:Price:MSRP: $348.95Now: $314.06Was: $348.95Subtotal: -
On Sale
ATHENA Cylinder Kit - Suzuki RM-Z450 P400510100027
ATHENA
MSRP: $647.95Now: $583.16Was: $647.95ATHENA Cylinder Kit Suzuki RM-Z450 P400510100027Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation...9310678- SKU:
- 9310678
- Availability:
- Ships Same Business Day
- Weight:
- 4.05 LBS
- DISPLACEMENT:
- 450 CC
- MATERIAL:
- ALUMINUM
- STYLE:
- STOCK BORE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- BORE SIZE METRIC:
- 96.00 MM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
MSRP: $647.95Now: $583.16Was: $647.95 -
On Sale
ATHENA Cylinder Kit - Suzuki RM-Z450 P400510100028
ATHENA
MSRP: $965.95Now: $869.36Was: $965.95ATHENA Cylinder Kit Suzuki RM-Z450 P400510100028Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation...9310679- SKU:
- 9310679
- Availability:
- Ships Same Business Day
- Weight:
- 3.80 LBS
- DISPLACEMENT:
- 490 CC
- MATERIAL:
- ALUMINUM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 4-STROKE
- BORE SIZE METRIC:
- 100.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $965.95Now: $869.36Was: $965.95 -
On Sale
ATHENA Cylinder Kit - Honda P400210100060
ATHENA
MSRP: $949.95Now: $854.96Was: $949.95Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All are bolt-on; no machining required9310864- SKU:
- 9310864
- Weight:
- 62.00 LBS
MSRP: $949.95Now: $854.96Was: $949.95Qty in Cart: 0Quantity:Price:MSRP: $949.95Now: $854.96Was: $949.95Subtotal: -
On Sale
ATHENA Cylinder Kit - Kawasaki P400250100025
ATHENA
MSRP: $849.95Now: $764.96Was: $849.95Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All are bolt-on; no machining required9310866- SKU:
- 9310866
- Weight:
- 62.00 LBS
MSRP: $849.95Now: $764.96Was: $849.95Qty in Cart: 0Quantity:Price:MSRP: $849.95Now: $764.96Was: $849.95Subtotal: -
On Sale
ATHENA Cylinder Kit - Honda - Stock P400210100066
ATHENA
MSRP: $647.95Now: $583.16Was: $647.95ATHENA Cylinder Kit Honda Stock P400210100066Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions,...9310955- SKU:
- 9310955
- Availability:
- Ships Same Business Day
- Weight:
- 3.35 LBS
- DISPLACEMENT:
- 250 CC
- MATERIAL:
- ALUMINUM
- STYLE:
- STOCK BORE
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 4-STROKE
- BORE SIZE METRIC:
- 79.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $647.95Now: $583.16Was: $647.95Qty in Cart: 0Quantity:Price:MSRP: $647.95Now: $583.16Was: $647.95Subtotal: -
On Sale
ATHENA Cylinder Kit - Honda - Big Bore P400210100067
ATHENA
MSRP: $978.95Now: $881.06Was: $978.95ATHENA Cylinder Kit Honda Big Bore P400210100067Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation...9310956- SKU:
- 9310956
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
- DISPLACEMENT:
- 289 CC
- MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 82.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
MSRP: $978.95Now: $881.06Was: $978.95 -
On Sale
ATHENA Cylinder Kit - Honda - Stock P400210100059
ATHENA
MSRP: $647.95Now: $583.16Was: $647.95ATHENA Cylinder Kit Honda Stock P400210100059Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions,...9310957- SKU:
- 9310957
- Availability:
- Ships Same Business Day
- Weight:
- 4.05 LBS
- PRODUCT NAME:
- CYLINDER KIT
- DISPLACEMENT:
- 450 CC
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STOCK BORE
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- UNITS:
- KIT
- BORE SIZE METRIC:
- 96.00 MM
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- ALUMINUM
MSRP: $647.95Now: $583.16Was: $647.95 -
On Sale
ATHENA Cylinder Kit - Kawasaki - Stock P400250100022
ATHENA
MSRP: $647.95Now: $583.16Was: $647.95ATHENA Cylinder Kit Kawasaki Stock P400250100022Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation...9310961- SKU:
- 9310961
- Availability:
- Ships Same Business Day
- Weight:
- 4.40 LBS
- ENGINE TYPE:
- 4-STROKE
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- BORE SIZE METRIC:
- 96.00 MM
- DISPLACEMENT:
- 450 CC
- MATERIAL:
- ALUMINUM
- STYLE:
- STOCK BORE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $647.95Now: $583.16Was: $647.95 -
On Sale
ATHENA Cylinder Kit - Yamaha - Stock P400485100076
ATHENA
MSRP: $855.95Now: $770.36Was: $855.95ATHENA Cylinder Kit Yamaha Stock P400485100076Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions,...9310975- SKU:
- 9310975
- Availability:
- Ships Same Business Day
- Weight:
- 4.85 LBS
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- ENGINE TYPE:
- 2-STROKE
- MATERIAL:
- ALUMINUM
- STYLE:
- STOCK BORE
- BORE SIZE METRIC:
- 47.50 MM
- DISPLACEMENT:
- 85 CC
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $855.95Now: $770.36Was: $855.95 -
On Sale
ATHENA Piston Kit S4C04750005A
ATHENA
MSRP: $109.95Now: $98.96Was: $109.95ATHENA Piston Kit S4C04750005ATwo-stroke pistons are made from 4032 silicium, Four-stroke pistons are made from 2618 silicium - the same material used to produce Formula 1 pistons, Both include 3% copper in materials for better heat resistance, All...9310976- SKU:
- 9310976
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- STOCK
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- B
- BORE SIZE METRIC:
- 47.45 MM
MSRP: $109.95Now: $98.96Was: $109.95 -
On Sale
ATHENA Gasket Kit - KX125LC P400250160008
ATHENA
MSRP: $102.95Now: $92.66Was: $102.95ATHENA Gasket Kit KX125LC P400250160008Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All...9342135- SKU:
- 9342135
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- BORE SIZE:
- 58,00 MM
- DISPLACEMENT:
- 144 CC
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 58.00 MM
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
MSRP: $102.95Now: $92.66Was: $102.95 -
On Sale
ATHENA Gasket Kit - KX250F P400250160010
ATHENA
MSRP: $54.95Now: $49.46Was: $54.95ATHENA Gasket Kit KX250F P400250160010Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All are...9342136- SKU:
- 9342136
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- DISPLACEMENT:
- 290 CC
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- BORE SIZE:
- 83,00 MM
- BORE SIZE METRIC:
- 83.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $54.95Now: $49.46Was: $54.95 -
On Sale
ATHENA Gasket Kit - KXF450 P400250160012
ATHENA
MSRP: $85.95Now: $77.36Was: $85.95ATHENA Gasket Kit KXF450 P400250160012Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All are...9342552- SKU:
- 9342552
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- TYPE:
- TOP END
- BORE SIZE:
- 100,00 MM
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE METRIC:
- 100.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $85.95Now: $77.36Was: $85.95 -
On Sale
ATHENA Gasket Kit - WR250R/X - 83 mm P400485160017
ATHENA
MSRP: $84.95Now: $76.46Was: $84.95ATHENA Gasket Kit WR250R/X 83 mm P400485160017Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions,...9341846- SKU:
- 9341846
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- BORE SIZE METRIC:
- 83.00 MM
- DISPLACEMENT:
- 290 CC
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- BORE SIZE:
- 83,00 MM
MSRP: $84.95Now: $76.46Was: $84.95 -
On Sale
ATHENA Top End Gasket Kit - KTM P400270600047
ATHENA
MSRP: $69.95Now: $62.96Was: $69.95ATHENA Top End Gasket Kit KTM P400270600047Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race gas...9341981- SKU:
- 9341981
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
MSRP: $69.95Now: $62.96Was: $69.95
