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 S4F05400023A
ATHENA
MSRP: $138.95Now: $125.06Was: $138.95Two-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...9104199- SKU:
- 9104199
- Weight:
- 6.00 LBS
MSRP: $138.95Now: $125.06Was: $138.95Qty in Cart: 0Quantity:Price:MSRP: $138.95Now: $125.06Was: $138.95Subtotal: -
On Sale
ATHENA Piston Kit S4F07700022B
ATHENA
MSRP: $225.95Now: $203.36Was: $225.95Two-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...9104196- SKU:
- 9104196
- Weight:
- 8.00 LBS
MSRP: $225.95Now: $203.36Was: $225.95Qty in Cart: 0Quantity:Price:MSRP: $225.95Now: $203.36Was: $225.95Subtotal: -
On Sale
ATHENA Piston Kit S4F08100005B
ATHENA
MSRP: $293.95Now: $264.56Was: $293.95ATHENA Piston Kit S4F08100005BIncludes rings, clips and pin, Easy-to-follow step-by-step installation instructions9104194- SKU:
- 9104194
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PISTON DIAMETER METRIC:
- 80.96 MM
- PISTON SIZE METRIC:
- STANDARD SIZE B
- COMPRESSION RATIO IMPERIAL:
- 13.6:1
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- EACH
MSRP: $293.95Now: $264.56Was: $293.95 -
On Sale
ATHENA Piston Kit S4F08100005A
ATHENA
MSRP: $293.95Now: $264.56Was: $293.95ATHENA Piston Kit S4F08100005AIncludes rings, clips and pin, Easy-to-follow step-by-step installation instructions9104193- SKU:
- 9104193
- Availability:
- Ships Same Business Day
- Weight:
- 0.67 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.6:1
- PISTON DIAMETER METRIC:
- 80.95 MM
- PRODUCT NAME:
- PISTON
- STYLE:
- BIG BORE
- PISTON SIZE METRIC:
- STANDARD SIZE A
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $293.95Now: $264.56Was: $293.95 -
On Sale
ATHENA Piston Kit S4C067500010
ATHENA
MSRP: $99.95Now: $89.96Was: $99.95ATHENA Piston Kit S4C067500010Includes rings, clips and pin, Easy-to-follow step-by-step installation instructions9104192- SKU:
- 9104192
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PISTON DIAMETER METRIC:
- 67.50 MM
- PRODUCT NAME:
- PISTON
- STYLE:
- BIG BORE
- COMPRESSION RATIO IMPERIAL:
- 11.9:1
- ENGINE TYPE:
- 4-STROKE
- PISTON SIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $99.95Now: $89.96Was: $99.95Qty in Cart: 0Quantity:Price:MSRP: $99.95Now: $89.96Was: $99.95Subtotal: -
WISECO Piston Kit - Kawasaki 40133M10050
WISECO
$237.50WISECO Piston Kit Kawasaki 40133M10050Pistons come without gasket kit9103950- SKU:
- 9103950
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
$237.50Qty in Cart: 0Quantity:Price:$237.50Subtotal: -
WISECO Piston Kit - Kawasaki 40133M10000
WISECO
$239.95WISECO Piston Kit Kawasaki 40133M10000Pistons come without gasket kit9103949- SKU:
- 9103949
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 82.00 MM
- UNITS:
- EACH
- BORE SIZE METRIC:
- 100.00 MM
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- DISPLACEMENT:
- 644 CC
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
$239.95 -
On Sale
ATHENA Piston Kit S4F05300002A
ATHENA
MSRP: $227.95Now: $205.16Was: $227.95ATHENA Piston Kit S4F05300002ATwo-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...9102780- SKU:
- 9102780
- Availability:
- Ships Same Business Day
- Weight:
- 0.53 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.8:1
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- A
- BORE SIZE METRIC:
- 52.95 MM
- PISTON DIAMETER METRIC:
- 52.95 MM
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
MSRP: $227.95Now: $205.16Was: $227.95 -
On Sale
ATHENA Piston Kit S4F07600005A
ATHENA
MSRP: $369.95Now: $332.96Was: $369.95Two-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...9102778- SKU:
- 9102778
- Weight:
- 10.00 LBS
MSRP: $369.95Now: $332.96Was: $369.95Qty in Cart: 0Quantity:Price:MSRP: $369.95Now: $332.96Was: $369.95Subtotal: -
On Sale
VERTEX Piston Kit 23647A
VERTEX
MSRP: $236.95Now: $217.76Was: $241.95VERTEX Piston Kit 23647AAll pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life9102572- SKU:
- 9102572
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- PISTON DIAMETER METRIC:
- 76.95 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- PISTON KIT
MSRP: $236.95Now: $217.76Was: $241.95 -
On Sale
VERTEX Piston Kit 23641B
VERTEX
MSRP: $247.95Now: $227.66Was: $252.95VERTEX Piston Kit 23641BAll pistons are heat treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity...9102568- SKU:
- 9102568
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
MSRP: $247.95Now: $227.66Was: $252.95 -
On Sale
VERTEX Piston Kit 23605B
VERTEX
MSRP: $219.95Now: $197.96Was: $219.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity-cast aluminum alloy (not...9102567- SKU:
- 9102567
- Weight:
- 8.00 LBS
MSRP: $219.95Now: $197.96Was: $219.95Qty in Cart: 0Quantity:Price:MSRP: $219.95Now: $197.96Was: $219.95Subtotal: -
On Sale
VERTEX Piston Kit 23599B
VERTEX
MSRP: $247.95Now: $227.66Was: $252.95VERTEX Piston Kit 23599BAll pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are...9102566- SKU:
- 9102566
- Availability:
- Ships Same Business Day
- Weight:
- 0.54 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.6:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- FORGED REPLICA
- CYLINDER DIAMETER METRIC:
- 79.00 MM
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- PISTON DIAMETER METRIC:
- 78.96 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $247.95Now: $227.66Was: $252.95 -
On Sale
VERTEX Piston Kit 23457B
VERTEX
MSRP: $236.95Now: $217.76Was: $241.95VERTEX Piston Kit 23457BAll pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are...9102564- SKU:
- 9102564
- Availability:
- Ships Same Business Day
- Weight:
- 0.79 LBS
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 72.00 MM
- PISTON DIAMETER METRIC:
- 71.95 MM
- STYLE:
- CAST REPLICA
- DISPLACEMENT:
- 300 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
MSRP: $236.95Now: $217.76Was: $241.95 -
On Sale
VERTEX Piston Kit 23446B
VERTEX
MSRP: $236.95Now: $217.76Was: $241.95VERTEX Piston Kit 23446BAll pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life9102562- SKU:
- 9102562
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 450 CC
- PISTON DIAMETER METRIC:
- 95.97 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 13.2:1
- CYLINDER DIAMETER METRIC:
- 96.00 MM
MSRP: $236.95Now: $217.76Was: $241.95 -
On Sale
ATHENA Piston Kit S4F102000040
ATHENA
MSRP: $284.95Now: $256.46Was: $284.95ATHENA Piston Kit S4F102000040Two-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...9102539- SKU:
- 9102539
- Availability:
- Ships Same Business Day
- Weight:
- 1.04 LBS
- PISTON DIAMETER METRIC:
- 101.96 MM
- COMPRESSION RATIO IMPERIAL:
- 12.2:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE SIZE METRIC:
- 101.96 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- REPLACEMENT FORGED PISTON
MSRP: $284.95Now: $256.46Was: $284.95 -
On Sale
ATHENA Piston Kit S4F100000190
ATHENA
MSRP: $257.95Now: $232.16Was: $257.95ATHENA Piston Kit S4F100000190Includes rings, clips and pin, Easy-to-follow step-by-step installation instructions9102535- SKU:
- 9102535
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- BIG BORE
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 100.00 MM
- UNITS:
- EACH
MSRP: $257.95Now: $232.16Was: $257.95 -
On Sale
ATHENA Piston Kit S4F04700001A
ATHENA
MSRP: $141.95Now: $127.76Was: $141.95ATHENA Piston Kit S4F04700001ATwo-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...9102533- SKU:
- 9102533
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- DISPLACEMENT:
- 85 CC
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 46.96 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- TYPE:
- A
MSRP: $141.95Now: $127.76Was: $141.95 -
On Sale
ATHENA Piston Kit S4F04500001B
ATHENA
MSRP: $141.95Now: $127.76Was: $141.95ATHENA Piston Kit S4F04500001BTwo-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...9102532- SKU:
- 9102532
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- B
- BORE SIZE METRIC:
- 44.97 MM
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 65 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
MSRP: $141.95Now: $127.76Was: $141.95 -
On Sale
ATHENA Piston Kit S4F04500001A
ATHENA
MSRP: $141.95Now: $127.76Was: $141.95ATHENA Piston Kit S4F04500001ATwo-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...9102531- SKU:
- 9102531
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 44.96 MM
- PISTON HEAD SHAPE:
- DOMED
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- DISPLACEMENT:
- 65 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- TYPE:
- A
MSRP: $141.95Now: $127.76Was: $141.95
