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 88 KB425C.020
KB PERFORMANCE
$298.95KB PERFORMANCE Piston Kit Twin Cam 88 KB425C.020Manufactured 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...9106090- SKU:
- 9106090
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.8:1
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- PISTON HEAD SHAPE:
- FLAT TOP
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$298.95 -
KB PERFORMANCE Piston Kit - Twin Cam 88 KB425C.030
KB PERFORMANCE
$298.95KB PERFORMANCE Piston Kit Twin Cam 88 KB425C.030Manufactured 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...9106091- SKU:
- 9106091
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.8:1
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- PISTON HEAD SHAPE:
- FLAT TOP
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$298.95Qty in Cart: 0Quantity:Price:$298.95Subtotal: -
KB PERFORMANCE Piston Kit - Twin Cam 88 KB426C.STD
KB PERFORMANCE
$306.95KB PERFORMANCE Piston Kit Twin Cam 88 KB426C.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...9106092- SKU:
- 9106092
- Availability:
- Ships Same Business Day
- Weight:
- 3.20 LBS
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON KIT
$306.95 -
KB PERFORMANCE Piston Kit - Twin Cam 88 KB426C.005
KB PERFORMANCE
$306.95KB PERFORMANCE Piston Kit Twin Cam 88 KB426C.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...9106093- SKU:
- 9106093
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
$306.95Qty in Cart: 0Quantity:Price:$306.95Subtotal: -
KB PERFORMANCE Piston Kit - Twin Cam 88 KB426C.010
KB PERFORMANCE
$306.95KB PERFORMANCE Piston Kit Twin Cam 88 KB426C.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...9106094- SKU:
- 9106094
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.750'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
$306.95 -
KB PERFORMANCE Piston Kit - Twin Cam 88 KB426C.020
KB PERFORMANCE
$306.95KB PERFORMANCE Piston Kit Twin Cam 88 KB426C.020Manufactured 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...9106095- SKU:
- 9106095
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
$306.95 -
KB PERFORMANCE Piston Kit - Twin Cam 88 KB426C.030
KB PERFORMANCE
$306.95KB PERFORMANCE Piston Kit Twin Cam 88 KB426C.030Manufactured 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...9106096- SKU:
- 9106096
- Availability:
- Ships Same Business Day
- Weight:
- 3.30 LBS
$306.95Qty in Cart: 0Quantity:Price:$306.95Subtotal: -
KB PERFORMANCE Piston Kit - Standard - M8 KB542LCA.STD
KB PERFORMANCE
$444.95KB PERFORMANCE Piston Kit Standard M8 KB542LCA.STDSuper Duty Series includes:, Anodized top ring groove and crown, Line2Line abradable skirt coating applied to .003" total thickness for a zero initial fit to allow coating to hone in for a tight quiet...9105724- SKU:
- 9105724
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- UNITS:
- KIT
- DISPLACEMENT:
- 117'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 104.77 MM
- PISTON MATERIAL:
- ALUMINUM
$444.95 -
On Sale
KB PERFORMANCE PISTON KIT M8 117" +010 KB542LCA.010
KB PERFORMANCE
MSRP: $444.95Now: $289.22Was: $444.95KB PERFORMANCE PISTON KIT M8 117" +010 KB542LCA.010Super Duty Series includes:, Anodized top ring groove and crown, Line2Line abradable skirt coating applied to .003" total thickness for a zero initial fit to allow coating to hone in for a tight quiet...9105725- SKU:
- 9105725
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- BORE SIZE METRIC:
- 104.77 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 117'
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
MSRP: $444.95Now: $289.22Was: $444.95 -
KB PERFORMANCE PISTON KIT M8 117" +020 KB542LCA.020
KB PERFORMANCE
$444.95KB PERFORMANCE PISTON KIT M8 117" +020 KB542LCA.020Super Duty Series includes:, Anodized top ring groove and crown, Line2Line abradable skirt coating applied to .003" total thickness for a zero initial fit to allow coating to hone in for a tight quiet...9105726- SKU:
- 9105726
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- BORE SIZE METRIC:
- 104.77 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 117'
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
$444.95 -
KB PERFORMANCE PISTON KIT M8 117" +030 KB542LCA.030
KB PERFORMANCE
$444.95KB PERFORMANCE PISTON KIT M8 117" +030 KB542LCA.030Super Duty Series includes:, Anodized top ring groove and crown, Line2Line abradable skirt coating applied to .003" total thickness for a zero initial fit to allow coating to hone in for a tight quiet...9105727- SKU:
- 9105727
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 117'
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 104.77 MM
- PISTON MATERIAL:
- ALUMINUM
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
$444.95 -
On Sale
KB PERFORMANCE PISTON KIT M8 117" +040 KB542LCA.040
KB PERFORMANCE
MSRP: $444.95Now: $289.22Was: $444.95KB PERFORMANCE PISTON KIT M8 117" +040 KB542LCA.040Super Duty Series includes:, Anodized top ring groove and crown, Line2Line abradable skirt coating applied to .003" total thickness for a zero initial fit to allow coating to hone in for a tight quiet...9105728- SKU:
- 9105728
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 117'
- UNITS:
- KIT
- BORE SIZE METRIC:
- 104.77 MM
- PISTON MATERIAL:
- ALUMINUM
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
MSRP: $444.95Now: $289.22Was: $444.95 -
KB PERFORMANCE Piston Kit - 124" - Standard - M8 KB576LCA.STD
KB PERFORMANCE
$464.95KB PERFORMANCE Piston Kit 124" Standard M8 KB576LCA.STDKB PERFORMANCE Piston Kit - 124" - Standard - M89106177- SKU:
- 9106177
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- BORE SIZE IMPERIAL:
- 4.250'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 124'
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- UNITS:
- KIT
$464.95Qty in Cart: 0Quantity:Price:$464.95Subtotal: -
KB PERFORMANCE Piston Kit - 124" - +.005" - M8 KB576LCA.005
KB PERFORMANCE
$464.95KB PERFORMANCE Piston Kit 124" +.005" M8 KB576LCA.005KB PERFORMANCE Piston Kit - 124" - +.005" - M89106178- SKU:
- 9106178
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 124'
- BORE - OVERSIZE:
- +0,005'
- UNITS:
- KIT
$464.95 -
KB PERFORMANCE Piston Kit KB258.STD
KB PERFORMANCE
$242.95KB PERFORMANCE Piston Kit KB258.STDManufactured 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...9102016- SKU:
- 9102016
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 8.6:1
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
$242.95 -
KB PERFORMANCE Piston Kit KB258.030
KB PERFORMANCE
$242.95KB PERFORMANCE Piston Kit KB258.030Manufactured 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...9102017- SKU:
- 9102017
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- COMPRESSION RATIO IMPERIAL:
- 8.6:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.498'
$242.95 -
KB PERFORMANCE Piston Kit KB258.040
KB PERFORMANCE
$242.95KB PERFORMANCE Piston Kit KB258.040Manufactured 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...9102018- SKU:
- 9102018
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.6:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.040'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- BORE SIZE IMPERIAL:
- 3.498'
- UNITS:
- KIT
$242.95Qty in Cart: 0Quantity:Price:$242.95Subtotal: -
KB PERFORMANCE Piston Kit KB305.040
KB PERFORMANCE
$255.95KB PERFORMANCE Piston Kit KB305.040Manufactured 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...9102019- SKU:
- 9102019
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 9.6:1
- BORE OVERSIZE - IMPERIAL:
- +0.040'
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
$255.95 -
KB PERFORMANCE Piston Kit KB348.010
KB PERFORMANCE
$306.95KB PERFORMANCE Piston Kit KB348.010Manufactured 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...9102020- SKU:
- 9102020
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.875'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.3:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
$306.95 -
KB PERFORMANCE Piston Kit - Twin Cam KB409C.STD
KB PERFORMANCE
$245.95KB PERFORMANCE Piston Kit Twin Cam KB409C.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 and...9100915- SKU:
- 9100915
- Availability:
- Ships Same Business Day
- Weight:
- 2.60 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- HYPEREUTECTIC ALLOY
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$245.95
