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!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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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...09102018- SKU:
- 09102018
- 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...09102019- SKU:
- 09102019
- 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...09102020- SKU:
- 09102020
- 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...09100915- SKU:
- 09100915
- 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 -
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...09100916- SKU:
- 09100916
- 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...09100917- SKU:
- 09100917
- 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,...09100930- SKU:
- 09100930
- 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...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
