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 KB297.010
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit KB297.010Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and less than...DS751260- SKU:
- DS751260
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- COMPRESSION RATIO IMPERIAL:
- 8.3:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$255.95 -
KB PERFORMANCE Piston Kit KB297.020
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit KB297.020Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and less than...DS751261- SKU:
- DS751261
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 8.3:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- BORE SIZE IMPERIAL:
- 3.498'
$255.95 -
KB PERFORMANCE Piston Kit KB297.030
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit KB297.030Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and less than...DS751262- SKU:
- DS751262
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.498'
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- COMPRESSION RATIO IMPERIAL:
- 8.3:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
$255.95 -
KB PERFORMANCE Piston Kit KB297.040
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit KB297.040Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and less than...DS751263- SKU:
- DS751263
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 8.3:1
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.040'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
$255.95 -
KB PERFORMANCE Piston Kit KB272.005
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit KB272.005Manufactured 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 less than...DS751264- SKU:
- DS751264
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON HEAD SHAPE:
- REVERSE
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$255.95 -
KB PERFORMANCE Piston Kit - Evolution KB305.000
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit Evolution KB305.000Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751265- SKU:
- DS751265
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 9.6:1
- UNITS:
- KIT
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$255.95 -
KB PERFORMANCE Piston Kit - Evolution KB305.005
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit Evolution KB305.005Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751266- SKU:
- DS751266
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 9.6:1
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$255.95 -
KB PERFORMANCE Piston Kit - Evolution KB305.010
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit Evolution KB305.010Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751267- SKU:
- DS751267
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE SIZE IMPERIAL:
- 3.498'
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- COMPRESSION RATIO IMPERIAL:
- 9.6:1
$255.95 -
KB PERFORMANCE Piston Kit - Evolution KB305.020
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit Evolution KB305.020Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751268- SKU:
- DS751268
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 9.6:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$255.95 -
KB PERFORMANCE Piston Kit - Evolution KB305.030
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit Evolution KB305.030Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy, Allow a tighter fit and longer piston and ring life, Diamond-machined pistons are held to plus or minus one gram weight and...DS751269- SKU:
- DS751269
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- UNITS:
- KIT
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 9.6:1
$255.95 -
KB PERFORMANCE Piston Kit - Twin Cam KB348.000
KB PERFORMANCE
$306.95KB PERFORMANCE Piston Kit Twin Cam KB348.000Manufactured 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...DS751281- SKU:
- DS751281
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 9.3:1
- BORE SIZE IMPERIAL:
- 3.875'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
$306.95 -
KB PERFORMANCE Piston Kit - Twin Cam KB348.005
KB PERFORMANCE
$306.95KB PERFORMANCE Piston Kit Twin Cam KB348.005Manufactured 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...DS751282- SKU:
- DS751282
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 9.3:1
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
$306.95 -
KB PERFORMANCE Piston Kit - Twin Cam KB411.000
KB PERFORMANCE
$319.95KB PERFORMANCE Piston Kit Twin Cam KB411.000Manufactured 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...DS751286- SKU:
- DS751286
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$319.95 -
KB PERFORMANCE Piston Kit - Twin Cam KB411.005
KB PERFORMANCE
$319.95KB PERFORMANCE Piston Kit Twin Cam KB411.005Manufactured 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...DS751287- SKU:
- DS751287
- Availability:
- Ships Same Business Day
- Weight:
- 3.08 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
$319.95 -
KB PERFORMANCE Piston Kit KB411.010
KB PERFORMANCE
$319.95KB PERFORMANCE Piston Kit KB411.010Manufactured 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 less than...DS751288- SKU:
- DS751288
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- UNITS:
- KIT
$319.95 -
KB PERFORMANCE Wrist Pin Lock Ring RRN-81
KB PERFORMANCE
$34.95KB PERFORMANCE Wrist Pin Lock Ring RRN-81Replacement piston lock rings for KB Performance Piston Kits.9130001- SKU:
- 9130001
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- APPLICATION:
- PISTON
- TYPE:
- LOCK RING
- PRODUCT NAME:
- WRIST PIN
- RIDING STYLE:
- STREET
- UNITS:
- 4 PACK
$34.95 -
KB PERFORMANCE Lock Ring - Twin Cam PRJ-100
KB PERFORMANCE
$34.95KB PERFORMANCE Lock Ring Twin Cam PRJ-100Replacement piston lock rings for KB Performance Piston Kits.9130002- SKU:
- 9130002
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- PISTON
- RIDING STYLE:
- STREET
- TYPE:
- LOCK RING
- UNITS:
- 4 PACK
- PRODUCT NAME:
- WRIST PIN
$34.95 -
KB PERFORMANCE Piston Kit - Twin Cam 88 KB425C.STD
KB PERFORMANCE
$298.95KB PERFORMANCE Piston Kit Twin Cam 88 KB425C.STDManufactured 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...9106087- SKU:
- 9106087
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.8:1
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.750'
- PISTON HEAD SHAPE:
- FLAT TOP
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$298.95 -
KB PERFORMANCE Piston Kit - Twin Cam 88 KB425C.005
KB PERFORMANCE
$298.95KB PERFORMANCE Piston Kit Twin Cam 88 KB425C.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...9106088- SKU:
- 9106088
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.8:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- PISTON HEAD SHAPE:
- FLAT TOP
$298.95 -
KB PERFORMANCE Piston Kit - Twin Cam 88 KB425C.010
KB PERFORMANCE
$298.95KB PERFORMANCE Piston Kit Twin Cam 88 KB425C.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...9106089- SKU:
- 9106089
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- COMPRESSION RATIO IMPERIAL:
- 8.8:1
- PISTON HEAD SHAPE:
- FLAT TOP
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PRODUCT NAME:
- PISTON KIT
$298.95
