Dirt Bike Piston and Ring Kits
J&J Motorsports is a leading supplier of dirt bike engine parts, offering a wide selection of pistons and piston ring kits from popular brands like Wiseco and Vertex Racing. We're proud to offer dirt bike parts from some of the most trusted names in the business, and we're committed to offering the best prices and customer service around. Whether you're looking for a replacement piston for your dirt bike or a complete piston ring kit, we've got you covered. Browse our selection of dirt bike engine parts today and find the perfect fit for your ride. Thanks for shopping with J&J Motorsports!
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- Qty in Cart
- Quantity
- Price
- Subtotal
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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 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...09106087- SKU:
- 09106087
- 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...09106088- SKU:
- 09106088
- 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...09106089- SKU:
- 09106089
- 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 -
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...09106090- SKU:
- 09106090
- 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
$298.95Qty in Cart: 0Quantity:Price:$298.95Subtotal: -
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...09106091- SKU:
- 09106091
- 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...09106092- SKU:
- 09106092
- 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...09106093- SKU:
- 09106093
- 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'
$306.95 -
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...09106094- SKU:
- 09106094
- 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...09106095- SKU:
- 09106095
- 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 - 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...09105724- SKU:
- 09105724
- 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: $267.00Was: $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...09105725- SKU:
- 09105725
- 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: $267.00Was: $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...09105726- SKU:
- 09105726
- 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...09105727- SKU:
- 09105727
- 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: $267.00Was: $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...09105728- SKU:
- 09105728
- 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: $267.00Was: $444.95Qty in Cart: 0Quantity:Price:MSRP: $444.95Now: $267.00Was: $444.95Subtotal: -
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 - M809106177- SKU:
- 09106177
- 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
$464.95 -
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" - M809106178- SKU:
- 09106178
- 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...09102016- SKU:
- 09102016
- 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...09102017- SKU:
- 09102017
- 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
