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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KB PERFORMANCE Piston Kit - Twin Cam KB409C.005
KB PERFORMANCE
$245.95KB PERFORMANCE Piston Kit Twin Cam KB409C.005Manufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloy, Allows a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...9100916- SKU:
- 9100916
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- UNITS:
- KIT
$245.95 -
KB PERFORMANCE Piston Kit - Twin Cam KB409C.010
KB PERFORMANCE
$245.95KB PERFORMANCE Piston Kit Twin Cam KB409C.010Manufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloy, Allows a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...9100917- SKU:
- 9100917
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- UNITS:
- KIT
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
$245.95 -
KB PERFORMANCE Forged Piston Kit KB922C.STD
KB PERFORMANCE
$311.95KB PERFORMANCE Forged Piston Kit KB922C.STDPistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available separately,...9100930- SKU:
- 9100930
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- STANDARD
- UNITS:
- KIT
$311.95 -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB904C.STD
KB PERFORMANCE
$335.95KB PERFORMANCE Forged Piston Kit Twin Cam KB904C.STDPistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available...9100933- SKU:
- 9100933
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- UNITS:
- KIT
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- COMPRESSION RATIO IMPERIAL:
- 9.25:1
$335.95 -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB906C.STD
KB PERFORMANCE
$335.95KB PERFORMANCE Forged Piston Kit Twin Cam KB906C.STDPistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available...9100935- SKU:
- 9100935
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
$335.95 -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB909C.STD
KB PERFORMANCE
$335.95KB PERFORMANCE Forged Piston Kit Twin Cam KB909C.STDPistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available...9100939- SKU:
- 9100939
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
$335.95 -
KB PERFORMANCE Super-Duty Piston KB909LCA.STD
KB PERFORMANCE
$427.95KB PERFORMANCE Super-Duty Piston KB909LCA.STDNew skirt coating technology is applied to the entire thickness of the piston-to-wall clearance for a zero install clearance; coating then abrades in on start-up to hone for the perfect fit per cylinder, Skirt...9105044- SKU:
- 9105044
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- DISPLACEMENT:
- 103'
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 98.40 MM
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
$427.95Qty in Cart: 0Quantity:Price:$427.95Subtotal: -
KB PERFORMANCE Super-Duty Piston KB661LCA.STD
KB PERFORMANCE
$427.95KB PERFORMANCE Super-Duty Piston KB661LCA.STDNew skirt coating technology is applied to the entire thickness of the piston-to-wall clearance for a zero install clearance; coating then abrades in on start-up to hone for the perfect fit per cylinder, Skirt...9105047- SKU:
- 9105047
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE SIZE METRIC:
- 101.60 MM
- DISPLACEMENT:
- 110'
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
$427.95 -
KB PERFORMANCE Super-Duty Piston KB662LCA.STD
KB PERFORMANCE
$427.95KB PERFORMANCE Super-Duty Piston KB662LCA.STDNew skirt coating technology is applied to the entire thickness of the piston-to-wall clearance for a zero install clearance; coating then abrades in on start-up to hone for the perfect fit per cylinder, Skirt...9105049- SKU:
- 9105049
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- DISPLACEMENT:
- 117'
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- UNITS:
- KIT
- BORE SIZE METRIC:
- 104.80 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
$427.95 -
KB PERFORMANCE Piston - Evolution KB920C.005
KB PERFORMANCE
$311.95KB PERFORMANCE Piston Evolution KB920C.005Pistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, New superior coated skirts, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings9105055- SKU:
- 9105055
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- +0,005'
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE IMPERIAL:
- 3.498'
$311.95 -
KB PERFORMANCE Piston - Evolution KB920C.010
KB PERFORMANCE
$311.95KB PERFORMANCE Piston Evolution KB920C.010Pistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, New superior coated skirts, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings9105056- SKU:
- 9105056
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,010'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$311.95 -
KB PERFORMANCE Piston - Evolution KB921C.005
KB PERFORMANCE
$311.95KB PERFORMANCE Piston Evolution KB921C.005Pistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, New superior coated skirts, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings9105058- SKU:
- 9105058
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- BORE - OVERSIZE:
- +0,005'
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- RIDING STYLE:
- STREET
$311.95Qty in Cart: 0Quantity:Price:$311.95Subtotal: -
KB PERFORMANCE Piston - Evolution KB921C.020
KB PERFORMANCE
$311.95KB PERFORMANCE Piston Evolution KB921C.020Pistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, New superior coated skirts, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings9105060- SKU:
- 9105060
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- BORE - OVERSIZE:
- +0,020'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE IMPERIAL:
- 3.498'
$311.95 -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB661C.005
KB PERFORMANCE
$335.95KB PERFORMANCE Forged Piston Kit Twin Cam KB661C.005Pistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available...9103974- SKU:
- 9103974
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 4.005'
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,005'
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$335.95 -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB907C.STD
KB PERFORMANCE
$335.95KB PERFORMANCE Forged Piston Kit Twin Cam KB907C.STDPistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available...9100937- SKU:
- 9100937
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.875'
$335.95 -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB660C.STD
KB PERFORMANCE
$335.95KB PERFORMANCE Forged Piston Kit Twin Cam KB660C.STDPistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available...9103970- SKU:
- 9103970
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
$335.95Qty in Cart: 0Quantity:Price:$335.95Subtotal: -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB662C.STD
KB PERFORMANCE
$335.95KB PERFORMANCE Forged Piston Kit Twin Cam KB662C.STDPistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available...9103976- SKU:
- 9103976
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.125'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$335.95 -
KB PERFORMANCE Forged Piston Kit - Twin Cam KB662C.005
KB PERFORMANCE
$335.95KB PERFORMANCE Forged Piston Kit Twin Cam KB662C.005Pistons forged from 4032 aluminum alloy, Offset pin design for quiet operation, Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings, Piston pin lock rings available...9103977- SKU:
- 9103977
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
$335.95Qty in Cart: 0Quantity:Price:$335.95Subtotal: -
K&S TECHNOLOGIES Water Pump Repair Gasket Kit - CR250R 75-1006
K&S TECHNOLOGIES
$32.95K&S TECHNOLOGIES Water Pump Repair Gasket Kit CR250R 75-1006Each kit includes all necessary gaskets, washers, seals and O-rings; kit contents vary by model9341914- SKU:
- 9341914
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$32.95 -
K&S TECHNOLOGIES Water Pump Repair Gasket - KX250F 75-2001
K&S TECHNOLOGIES
$52.95K&S TECHNOLOGIES Water Pump Repair Gasket KX250F 75-2001Each kit includes all necessary gaskets, washers, seals and O-rings; kit contents vary by model9341915- SKU:
- 9341915
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$52.95
