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
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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On Sale
ATHENA Piston Kit S4F05400017C
ATHENA
MSRP: $130.95Now: $117.86Was: $130.95ATHENA Piston Kit S4F05400017CTwo-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...9103893- SKU:
- 9103893
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE SIZE METRIC:
- 53.97 MM
- DISPLACEMENT:
- 124 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- C
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PISTON HEAD SHAPE:
- FLAT TOP
- UNITS:
- KIT
MSRP: $130.95Now: $117.86Was: $130.95Qty in Cart: 0Quantity:Price:MSRP: $130.95Now: $117.86Was: $130.95Subtotal: -
On Sale
ATHENA Piston Kit S4F06640018C
ATHENA
MSRP: $187.95Now: $169.16Was: $187.95ATHENA Piston Kit S4F06640018CTwo-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...9103894- SKU:
- 9103894
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE SIZE METRIC:
- 66.36 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- C
- COMPRESSION RATIO IMPERIAL:
- STOCK
- UNITS:
- KIT
MSRP: $187.95Now: $169.16Was: $187.95 -
On Sale
ATHENA Piston Kit S4F07680011B
ATHENA
MSRP: $261.95Now: $235.76Was: $261.95Two-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 pistons are forged using a...9103896- SKU:
- 9103896
- Weight:
- 8.00 LBS
MSRP: $261.95Now: $235.76Was: $261.95Qty in Cart: 0Quantity:Price:MSRP: $261.95Now: $235.76Was: $261.95Subtotal: -
On Sale
ATHENA Piston Kit S4F07700006A
ATHENA
MSRP: $244.95Now: $220.46Was: $244.95ATHENA Piston Kit S4F07700006ATwo-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...9103897- SKU:
- 9103897
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.4:1
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- A
- ENGINE TYPE:
- 4-STROKE
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- DISPLACEMENT:
- 249 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE SIZE METRIC:
- 76.95 MM
- PRODUCT NAME:
- PISTON KIT
MSRP: $244.95Now: $220.46Was: $244.95 -
On Sale
ATHENA Piston Kit S4F09700016A
ATHENA
MSRP: $269.95Now: $242.96Was: $269.95Two-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 pistons are forged using a...9103901- SKU:
- 9103901
- Weight:
- 1.05 LBS
MSRP: $269.95Now: $242.96Was: $269.95Qty in Cart: 0Quantity:Price:MSRP: $269.95Now: $242.96Was: $269.95Subtotal: -
On Sale
ATHENA Piston Kit S4C067250010
ATHENA
MSRP: $99.95Now: $89.96Was: $99.95ATHENA Piston Kit S4C067250010Includes rings, clips and pin, Easy-to-follow step-by-step installation instructions9104191- SKU:
- 9104191
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PISTON DIAMETER METRIC:
- 67.25 MM
- PRODUCT NAME:
- PISTON
- STYLE:
- BIG BORE
- ENGINE TYPE:
- 4-STROKE
- PISTON SIZE METRIC:
- +0.25 MM
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 11.9:1
- RIDING STYLE:
- OFF-ROAD
MSRP: $99.95Now: $89.96Was: $99.95Qty in Cart: 0Quantity:Price:MSRP: $99.95Now: $89.96Was: $99.95Subtotal: -
On Sale
ATHENA Piston Kit S4C04850003B
ATHENA
MSRP: $119.95Now: $107.96Was: $119.95ATHENA Piston Kit S4C04850003BTwo-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...9104655- SKU:
- 9104655
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 48.45 MM
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- DISPLACEMENT:
- 85 CC
- TYPE:
- B
- PRODUCT NAME:
- PISTON KIT
MSRP: $119.95Now: $107.96Was: $119.95 -
On Sale
ATHENA Piston Kit S4F07680012A
ATHENA
MSRP: $260.95Now: $234.86Was: $260.95Two-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 pistons are forged using a...9104656- SKU:
- 9104656
- Weight:
- 8.00 LBS
MSRP: $260.95Now: $234.86Was: $260.95Qty in Cart: 0Quantity:Price:MSRP: $260.95Now: $234.86Was: $260.95Subtotal: -
On Sale
ATHENA Piston Kit S4F07680012B
ATHENA
MSRP: $260.95Now: $234.86Was: $260.95Two-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 pistons are forged using a...9104657- SKU:
- 9104657
- Weight:
- 8.00 LBS
MSRP: $260.95Now: $234.86Was: $260.95Qty in Cart: 0Quantity:Price:MSRP: $260.95Now: $234.86Was: $260.95Subtotal: -
On Sale
ATHENA Piston Kit S4F05600005B
ATHENA
MSRP: $168.95Now: $152.06Was: $168.95Two-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 pistons are forged using a...9102963- SKU:
- 9102963
- Weight:
- 9.00 LBS
MSRP: $168.95Now: $152.06Was: $168.95Qty in Cart: 0Quantity:Price:MSRP: $168.95Now: $152.06Was: $168.95Subtotal: -
On Sale
ATHENA Piston Kit S4F05600005C
ATHENA
MSRP: $168.95Now: $152.06Was: $168.95Two-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 pistons are forged using a...9102964- SKU:
- 9102964
- Weight:
- 9.00 LBS
MSRP: $168.95Now: $152.06Was: $168.95Qty in Cart: 0Quantity:Price:MSRP: $168.95Now: $152.06Was: $168.95Subtotal: -
On Sale
ATHENA Cylinder Kit - Race - Yamaha P400485105002
ATHENA
MSRP: $1,136.95Now: $1,023.26Was: $1,136.95ATHENA Cylinder Kit Race Yamaha P400485105002Kits 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,...9030617- SKU:
- 9030617
- Availability:
- Ships Same Business Day
- Weight:
- 15.85 LBS
MSRP: $1,136.95Now: $1,023.26Was: $1,136.95Qty in Cart: 0Quantity:Price:MSRP: $1,136.95Now: $1,023.26Was: $1,136.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Kawasaki P400250850030
ATHENA
MSRP: $66.95Now: $60.26Was: $66.95ATHENA Complete Gasket Kit Kawasaki P400250850030Superior-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...9341520- SKU:
- 9341520
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- -
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $66.95Now: $60.26Was: $66.95 -
On Sale
ATHENA Gasket Kit - KX65 - 50 mm P400250160007
ATHENA
MSRP: $40.95Now: $36.86Was: $40.95ATHENA Gasket Kit KX65 50 mm P400250160007Kits 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...9341533- SKU:
- 9341533
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- BORE SIZE METRIC:
- 50.00 MM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE:
- 50,00 MM
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- TYPE:
- TOP END
MSRP: $40.95Now: $36.86Was: $40.95Qty in Cart: 0Quantity:Price:MSRP: $40.95Now: $36.86Was: $40.95Subtotal: -
On Sale
ATHENA Gasket Kit - RMZ450 - 100 mm P400510160006
ATHENA
MSRP: $88.95Now: $80.06Was: $88.95ATHENA Gasket Kit RMZ450 100 mm P400510160006Kits 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,...9341538- SKU:
- 9341538
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 100.00 MM
- UNITS:
- KIT
- BORE SIZE:
- 100,00 MM
- TYPE:
- TOP END
MSRP: $88.95Now: $80.06Was: $88.95 -
On Sale
ATHENA Complete Gasket Kit - Kawasaki P400250850011
ATHENA
MSRP: $55.95Now: $50.36Was: $55.95ATHENA Complete Gasket Kit Kawasaki P400250850011Superior-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...9340204- SKU:
- 9340204
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- -
- PRODUCT NAME:
- GASKET KIT
MSRP: $55.95Now: $50.36Was: $55.95 -
On Sale
ATHENA Top End Gasket Kit P400250600015
ATHENA
MSRP: $32.95Now: $29.66Was: $32.95ATHENA Top End Gasket Kit P400250600015Specifically 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...9340205- SKU:
- 9340205
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- TYPE:
- TOP END
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $32.95Now: $29.66Was: $32.95 -
On Sale
ATHENA Top End Gasket Kit P400250600011
ATHENA
MSRP: $39.95Now: $35.96Was: $39.95ATHENA Top End Gasket Kit P400250600011Specifically 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...9340206- SKU:
- 9340206
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
MSRP: $39.95Now: $35.96Was: $39.95 -
On Sale
ATHENA Complete Gasket Kit - Suzuki P400510850034
ATHENA
MSRP: $40.95Now: $36.86Was: $40.95ATHENA Complete Gasket Kit Suzuki P400510850034Superior-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...9340207- SKU:
- 9340207
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- -
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $40.95Now: $36.86Was: $40.95 -
On Sale
ATHENA Complete Gasket Kit - Suzuki P400510850035
ATHENA
MSRP: $74.95Now: $67.46Was: $74.95ATHENA Complete Gasket Kit Suzuki P400510850035Superior-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...9340208- SKU:
- 9340208
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- 2-STROKE
MSRP: $74.95Now: $67.46Was: $74.95
