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!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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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...09100933- SKU:
- 09100933
- 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...09100935- SKU:
- 09100935
- 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...09100939- SKU:
- 09100939
- 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...09105044- SKU:
- 09105044
- 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'
$427.95 -
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...09105047- SKU:
- 09105047
- 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
$427.95Qty in Cart: 0Quantity:Price:$427.95Subtotal: -
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...09105049- SKU:
- 09105049
- 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 rings09105055- SKU:
- 09105055
- 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 rings09105056- SKU:
- 09105056
- 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 rings09105058- SKU:
- 09105058
- 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
$311.95 -
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 rings09105060- SKU:
- 09105060
- 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...09103974- SKU:
- 09103974
- 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...09100937- SKU:
- 09100937
- 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...09103970- SKU:
- 09103970
- 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
$335.95 -
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...09103976- SKU:
- 09103976
- 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 -
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 model09341914- SKU:
- 09341914
- 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 model09341915- SKU:
- 09341915
- 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 -
K&S TECHNOLOGIES Water Pump Repair Kit - CR85R 75-1008
K&S TECHNOLOGIES
$31.95K&S TECHNOLOGIES Water Pump Repair Kit CR85R 75-1008Each kit includes all necessary gaskets, washers, seals and O-rings; kit contents vary by model09342879- SKU:
- 09342879
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$31.95 -
JAMES GASKET Starter Shaft Seal - Big Twin 12053-A
JAMES GASKET
$28.00JAMES GASKET Starter Shaft Seal Big Twin 12053-AMade in the U.S.A.DS194089- SKU:
- DS194089
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- STARTER SHAFT
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$28.00 -
JAMES GASKET Countershaft Nut with Seal - Big Twin 35211-36DL
JAMES GASKET
$51.95JAMES GASKET Countershaft Nut with Seal Big Twin 35211-36DLOnly James Gaskets' Super Nut™ improves the sealing ability on all transmission shafts at an affordable price, Helps avoid transmission oil leakage from main drive gear bushing wearDS194076- SKU:
- DS194076
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- SUPER NUT
- APPLICATION:
- SPROCKET
- PRODUCT NAME:
- NUT
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$51.95 -
JAMES GASKET Shifter Shaft Inner Seal - Big Twin 12066
JAMES GASKET
$31.20JAMES GASKET Shifter Shaft Inner Seal Big Twin 12066JAMES GASKET Shifter Shaft Inner Seal - Big TwinDS194084- SKU:
- DS194084
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- STARTER SHAFT
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$31.20
