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 S4F06600002A
ATHENA
MSRP: $150.95Now: $135.86Was: $150.95ATHENA Piston Kit S4F06600002ATwo-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...9100450- SKU:
- 9100450
- Availability:
- Ships Same Business Day
- Weight:
- 0.62 LBS
- DISPLACEMENT:
- 198 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- PISTON HEAD SHAPE:
- FLAT TOP
- BORE SIZE METRIC:
- 65.94 MM
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- A
- UNITS:
- KIT
MSRP: $150.95Now: $135.86Was: $150.95Qty in Cart: 0Quantity:Price:MSRP: $150.95Now: $135.86Was: $150.95Subtotal: -
On Sale
ATHENA Piston Kit S4F06600002B
ATHENA
MSRP: $150.95Now: $135.86Was: $150.95ATHENA Piston Kit S4F06600002BTwo-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...9100451- SKU:
- 9100451
- Availability:
- Ships Same Business Day
- Weight:
- 0.62 LBS
- BORE SIZE METRIC:
- 65.95 MM
- COMPRESSION RATIO IMPERIAL:
- STOCK
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 198 CC
- PISTON HEAD SHAPE:
- FLAT TOP
- TYPE:
- B
MSRP: $150.95Now: $135.86Was: $150.95 -
On Sale
ATHENA Piston Kit - Yamaha/Malaguti S4C04760006A
ATHENA
MSRP: $51.95Now: $46.76Was: $51.95ATHENA Piston Kit Yamaha/Malaguti S4C04760006APiston kits include piston, rings, wrist pin, and circlips9100581- SKU:
- 9100581
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 47.66 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
MSRP: $51.95Now: $46.76Was: $51.95 -
On Sale
ATHENA Piston Kit S4F06640018A
ATHENA
MSRP: $187.95Now: $169.16Was: $187.95ATHENA Piston Kit S4F06640018ATwo-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...9100627- SKU:
- 9100627
- Availability:
- Ships Same Business Day
- Weight:
- 0.67 LBS
- BORE SIZE METRIC:
- 66.34 MM
- COMPRESSION RATIO IMPERIAL:
- STOCK
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- A
- ENGINE TYPE:
- 2-STROKE
- PISTON HEAD SHAPE:
- DOMED
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $187.95Now: $169.16Was: $187.95Qty in Cart: 0Quantity:Price:MSRP: $187.95Now: $169.16Was: $187.95Subtotal: -
On Sale
ATHENA Piston Kit S4F07800003C
ATHENA
MSRP: $223.95Now: $201.56Was: $223.95ATHENA Piston Kit S4F07800003CTwo-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...9100632- SKU:
- 9100632
- Availability:
- Ships Same Business Day
- Weight:
- 0.53 LBS
MSRP: $223.95Now: $201.56Was: $223.95Qty in Cart: 0Quantity:Price:MSRP: $223.95Now: $201.56Was: $223.95Subtotal: -
On Sale
ATHENA Piston Kit S4F06640019A
ATHENA
MSRP: $173.95Now: $156.56Was: $173.95ATHENA Piston Kit S4F06640019ATwo-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...9100641- SKU:
- 9100641
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- BORE SIZE METRIC:
- 66.34 MM
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- DOMED
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- DISPLACEMENT:
- 249 CC
- TYPE:
- A
MSRP: $173.95Now: $156.56Was: $173.95Qty in Cart: 0Quantity:Price:MSRP: $173.95Now: $156.56Was: $173.95Subtotal: -
On Sale
ATHENA Piston Kit S4F06640019B
ATHENA
MSRP: $173.95Now: $156.56Was: $173.95ATHENA Piston Kit S4F06640019BTwo-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...9100642- SKU:
- 9100642
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
MSRP: $173.95Now: $156.56Was: $173.95Qty in Cart: 0Quantity:Price:MSRP: $173.95Now: $156.56Was: $173.95Subtotal: -
On Sale
ATHENA Piston Kit S5F08200001A
ATHENA
MSRP: $233.95Now: $210.56Was: $233.95ATHENA Piston Kit S5F08200001AIncludes rings, clips and pin, Easy-to-follow step-by-step installation instructions9100646- SKU:
- 9100646
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PISTON DIAMETER METRIC:
- 81.95 MM
- STYLE:
- BIG BORE
- PISTON SIZE METRIC:
- STANDARD SIZE A
- PRODUCT NAME:
- PISTON
- COMPRESSION RATIO IMPERIAL:
- 13.1:1
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $233.95Now: $210.56Was: $233.95 -
On Sale
ATHENA Piston Kit S4C05800001A
ATHENA
MSRP: $242.95Now: $218.66Was: $242.95ATHENA Piston Kit S4C05800001AIncludes rings, clips and pin, Easy-to-follow step-by-step installation instructions9100648- SKU:
- 9100648
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- STYLE:
- BIG BORE
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 57.94 MM
- PISTON SIZE METRIC:
- STANDARD SIZE A
- COMPRESSION RATIO IMPERIAL:
- 14.0:1
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $242.95Now: $218.66Was: $242.95 -
On Sale
ATHENA Piston Kit S4C04850001B
ATHENA
MSRP: $88.95Now: $80.06Was: $88.95ATHENA Piston Kit S4C04850001BTwo-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...9101418- SKU:
- 9101418
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON HEAD SHAPE:
- DOMED
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 48.46 MM
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- B
MSRP: $88.95Now: $80.06Was: $88.95 -
On Sale
ATHENA Piston S4C05400016A
ATHENA
MSRP: $185.95Now: $167.36Was: $185.95ATHENA Piston S4C05400016AIncludes rings, clips and pin, Easy-to-follow step-by-step installation instructions9100669- SKU:
- 9100669
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 14.8:1
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 53.94 MM
- PISTON SIZE METRIC:
- STANDARD SIZE A
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD BORE
MSRP: $185.95Now: $167.36Was: $185.95 -
On Sale
ATHENA Piston Kit S4C05000002A
ATHENA
MSRP: $100.95Now: $90.86Was: $100.95ATHENA Piston Kit S4C05000002AIncludes rings, clips and pin, Easy-to-follow step-by-step installation instructions9101328- SKU:
- 9101328
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- PISTON DIAMETER METRIC:
- 49.95 MM
- PRODUCT NAME:
- PISTON
- COMPRESSION RATIO IMPERIAL:
- 15.0:1
- ENGINE TYPE:
- 2-STROKE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- PISTON SIZE METRIC:
- STANDARD SIZE A
MSRP: $100.95Now: $90.86Was: $100.95 -
On Sale
ATHENA Piston Kit S5F08300007A
ATHENA
MSRP: $266.95Now: $240.26Was: $266.95ATHENA Piston Kit S5F08300007AIncludes rings, clips and pin, Easy-to-follow step-by-step installation instructions9101338- SKU:
- 9101338
- Availability:
- Ships Same Business Day
- Weight:
- 0.68 LBS
- PISTON SIZE METRIC:
- STANDARD SIZE A
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- EACH
- STYLE:
- BIG BORE
- COMPRESSION RATIO IMPERIAL:
- 12.7:1
- PISTON DIAMETER METRIC:
- 82.95 MM
- PRODUCT NAME:
- PISTON
MSRP: $266.95Now: $240.26Was: $266.95Qty in Cart: 0Quantity:Price:MSRP: $266.95Now: $240.26Was: $266.95Subtotal: -
On Sale
ATHENA Piston Kit S4F09600014B
ATHENA
MSRP: $226.95Now: $204.26Was: $226.95Two-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...9102131- SKU:
- 9102131
- Weight:
- 13.00 LBS
MSRP: $226.95Now: $204.26Was: $226.95Qty in Cart: 0Quantity:Price:MSRP: $226.95Now: $204.26Was: $226.95Subtotal: -
On Sale
ATHENA Piston Kit S4F090000050
ATHENA
MSRP: $273.95Now: $246.56Was: $273.95ATHENA Piston Kit S4F090000050Two-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...9102764- SKU:
- 9102764
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- TYPE:
- REPLACEMENT FORGED PISTON
- PISTON DIAMETER METRIC:
- 89.96 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE SIZE METRIC:
- 89.96 MM
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $273.95Now: $246.56Was: $273.95 -
On Sale
ATHENA Piston Kit S4F07200006A
ATHENA
MSRP: $259.95Now: $233.96Was: $259.95ATHENA Piston Kit S4F07200006AIncludes rings, clips and pin, Easy-to-follow step-by-step installation instructions9102666- SKU:
- 9102666
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 16.0:1
- PISTON SIZE METRIC:
- STANDARD SIZE A
- PISTON DIAMETER METRIC:
- 71.95 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
MSRP: $259.95Now: $233.96Was: $259.95 -
On Sale
ATHENA Piston Kit S4F07200006B
ATHENA
MSRP: $228.95Now: $206.06Was: $228.95ATHENA Piston Kit S4F07200006BIncludes rings, clips and pin, Easy-to-follow step-by-step installation instructions9102667- SKU:
- 9102667
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- STANDARD SIZE B
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- COMPRESSION RATIO IMPERIAL:
- 16.0:1
- PISTON DIAMETER METRIC:
- 71.96 MM
MSRP: $228.95Now: $206.06Was: $228.95 -
On Sale
ATHENA Piston Kit S4F08200005A
ATHENA
MSRP: $277.95Now: $250.16Was: $277.95ATHENA Piston Kit S4F08200005AIncludes rings, clips and pin, Easy-to-follow step-by-step installation instructions9103414- SKU:
- 9103414
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- PISTON SIZE METRIC:
- STANDARD SIZE A
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 81.95 MM
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 16.0:1
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
MSRP: $277.95Now: $250.16Was: $277.95 -
On Sale
ATHENA Piston Kit S4F05400017A
ATHENA
MSRP: $130.95Now: $117.86Was: $130.95ATHENA Piston Kit S4F05400017ATwo-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...9103891- SKU:
- 9103891
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- A
- BORE SIZE METRIC:
- 53.95 MM
- PISTON HEAD SHAPE:
- FLAT TOP
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
MSRP: $130.95Now: $117.86Was: $130.95 -
On Sale
ATHENA Piston Kit S4F05400017B
ATHENA
MSRP: $130.95Now: $117.86Was: $130.95ATHENA Piston Kit S4F05400017BTwo-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...9103892- SKU:
- 9103892
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- DISPLACEMENT:
- 124 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- PISTON HEAD SHAPE:
- FLAT TOP
- UNITS:
- KIT
- BORE SIZE METRIC:
- 53.96 MM
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- B
MSRP: $130.95Now: $117.86Was: $130.95
