ATV/UTV Piston and Ring Kits
ATV/UTV Piston & Ring Kits at JJ Motorsports
Rebuild your ATV/UTV engine with premium forged piston and ring kits from JJ Motorsports, featuring high-compression and big-bore options for massive power gains on Yamaha YFZ450, Honda TRX450R, Suzuki LTZ400, and more. These race-proven kits deliver superior durability and performance in off-road, trail, and dune conditions.
Shop Millennium, JE Pistons, and Wossner piston kits for championship-level quality. Explore related categories such as ATV/UTV engine for cylinders and gaskets, or ATV/UTV for cams and exhaust to complete your top-end rebuild and dominate the track or trail.
Top ATV/UTV Piston & Ring Kits
- Millennium Piston Kit K8897D500-2 – +5.00mm big-bore piston kit; forged for Yamaha YFZ450/R with rings, pin, and clips.
- JE Pistons Piston Kit 261546 – High-compression forged piston; includes rings and wrist pin for Honda TRX450R.
- Wossner Piston Kit 8094D050 – +0.50mm oversize piston kit; lightweight forged with moly coating for Suzuki LTZ400.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Wiseco Piston Kit 84.00mm for Polaris Big Boss 400L 6X6 1995-1997 675M08400
WISECO
$184.95If you're running a Polaris Big Boss 400L and want to unlock genuine performance gains, this Wiseco piston kit delivers the compression ratio and durability that separates race-ready builds from stock setups. The high-silicon aluminum forging combined...675M08400- SKU:
- 675M08400
- Availability:
- Ships Same Business Day
- Weight:
- 1.02 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- STROKE LENGTH:
- 70,00 MM
- STROKE LENGTH METRIC:
- 70.00 MM
- DISPLACEMENT:
- 400 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,00 MM
- BORE SIZE METRIC:
- 84.00 MM
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE METRIC:
- +1.00 MM
$184.95 -
Wiseco Piston Kit 84.50mm for Polaris Sportsman 400 4x4 2001-2003 675M08450
WISECO
$199.95If you're running a 2001-2003 Polaris Sportsman 400 4x4 on the trail or track, piston durability and power output directly determine your engine's reliability and performance ceiling. The Wiseco 84.50mm piston kit delivers the forged strength and...675M08450- SKU:
- 675M08450
- Availability:
- Ships Same Business Day
- Weight:
- 1.02 LBS
- BORE - OVERSIZE METRIC:
- +1.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- DISPLACEMENT:
- 400 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 70,00 MM
- BORE - OVERSIZE:
- +1,50 MM
- BORE SIZE METRIC:
- 84.50 MM
- STROKE LENGTH METRIC:
- 70.00 MM
$199.95 -
Wiseco Piston Kit 85.00mm Oversize for Polaris Big Boss 400L 6X6 1995-1997 675M08500
WISECO
$199.95When you're pushing your Big Boss 400L to its limits, factory pistons become the weak link. This Wiseco +2.00mm oversize piston kit delivers the strength and compression you need to extract measurable gains in horsepower and torque while maintaining the...675M08500- SKU:
- 675M08500
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE - OVERSIZE:
- +2,00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- STROKE LENGTH METRIC:
- 70.00 MM
- BORE SIZE METRIC:
- 85.00 MM
- DISPLACEMENT:
- 400 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 70,00 MM
$199.95Qty in Cart: 0Quantity:Price:$199.95Subtotal: -
Wiseco Piston Standard Yamaha Banshee 350 4x2 1987-2006 795M06400
WISECO
$171.95The Yamaha Banshee 350 demands precision internals to handle aggressive riding and racing conditions. Wiseco's high-silicon aluminum construction delivers the strength and thermal stability needed to prevent piston failure under sustained load, while the...795M06400- SKU:
- 795M06400
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- DISPLACEMENT:
- 346 CC
- STROKE LENGTH METRIC:
- 54.00 MM
- BORE SIZE METRIC:
- 64.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH:
- 54,00 MM
$171.95Qty in Cart: 0Quantity:Price:$171.95Subtotal: -
Wiseco Piston Kit 75.50mm 11:1 Compression Honda TRX300EX 1993-2008 4574M07550
WISECO
$209.95If you're running a TRX300EX and want measurable gains in displacement and compression, a quality piston kit is one of the most effective bolt-on upgrades available. The Wiseco 75.50mm 11:1 compression kit delivers the precision engineering and...09100377- SKU:
- 09100377
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- DISPLACEMENT:
- 293 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 65.50 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
- PRODUCT NAME:
- PISTON
- BORE SIZE METRIC:
- 75.50 MM
- BORE - OVERSIZE:
- +1,50 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$209.95Qty in Cart: 0Quantity:Price:$209.95Subtotal: -
Wiseco Piston Kit 52.00mm Standard Bore for 2001-2005 Polaris Sportsman 90 839M05200
WISECO
$128.95When your Polaris Sportsman 90 needs a fresh top end, the Wiseco Piston Kit delivers the precision fit and durability required to restore—or exceed—original performance. This standard bore kit is engineered to improve combustion efficiency and engine...09100381- SKU:
- 09100381
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- DISPLACEMENT:
- 89 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 41.90 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 52.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
$128.95 -
Wiseco Piston Kit Yamaha YFZ450R 2009-2013 98mm 12.5:1 4906M09800
WISECO
$309.95A worn or stock piston limits your YFZ450R's potential—this Wiseco big-bore kit reclaims horsepower and torque while delivering the durability needed for serious riding. The 98mm bore with 12.5:1 compression ratio extracts more power from each combustion...09102845- SKU:
- 09102845
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE - OVERSIZE:
- +3,00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- DISPLACEMENT:
- 478 CC
- STROKE LENGTH METRIC:
- 62.00 MM
- DISPLACEMENT:
- 467 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +3.00 MM
- BORE SIZE METRIC:
- 98.00 MM
$309.95 -
Wiseco Piston Kit Yamaha YFM450 Grizzly 2007-2014 4939M08450
WISECO
$224.95When your YFM450 Grizzly's factory pistons start showing wear, you're losing compression, power, and efficiency. The Wiseco 4939M08450 piston kit restores your engine to peak performance with precision-engineered components built to withstand repeated...09102851- SKU:
- 09102851
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 75.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 420 CC
- BORE SIZE METRIC:
- 84.50 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- RIDING STYLE:
- UTV
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco Piston Kit Yamaha YFM450 Grizzly 2007-2014 4939M08500
WISECO
$224.95Whether you're rebuilding your YFM450 Grizzly after hard trail use or maximizing output on your performance build, the Wiseco Piston Kit delivers the precision engineering and durability that separates reliable power from catastrophic failure. Wiseco's...09102852- SKU:
- 09102852
- Availability:
- Ships Same Business Day
- Weight:
- 0.97 LBS
- BORE SIZE METRIC:
- 85.00 MM
- DISPLACEMENT:
- 420 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 75.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- +0,50 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- BORE - OVERSIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- UTV
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco Piston Kit 85.50mm 11:1 Compression Yamaha YFM450 Grizzly 2007-2014 4939M08550
WISECO
$224.95A worn or stock piston limits your Grizzly's potential for consistent power delivery and fuel efficiency. The Wiseco 4939M08550 piston kit delivers precision-engineered internals built to handle aggressive riding while maintaining durability across...09102853- SKU:
- 09102853
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE SIZE METRIC:
- 85.50 MM
- DISPLACEMENT:
- 420 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 75.00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- RIDING STYLE:
- UTV
$224.95 -
Wiseco 80mm Piston Kit for Kawasaki KVF650 Brute Force 2005-2010 4782M08000
WISECO
$189.95When you're pushing your KVF650 Brute Force to its limits, stock internals become your bottleneck. The Wiseco 80mm piston kit delivers the durability and precision needed to handle sustained high-RPM abuse while maintaining the compression and efficiency...4782M08000- SKU:
- 4782M08000
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 63.00 MM
- BORE SIZE METRIC:
- 80.00 MM
- DISPLACEMENT:
- 633 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON DIAMETER METRIC:
- 79.95 MM
$189.95Qty in Cart: 0Quantity:Price:$189.95Subtotal: -
Wiseco Piston Kit for Kawasaki KVF650 Brute Force 4x4 2005-2010 4782M08100
WISECO
$179.40When you're pushing your Brute Force to its limits on the trail or at the strip, your factory piston won't cut it. The Wiseco 4782M08100 is engineered to handle the demands of serious riders who refuse to compromise on reliability or power. This...4782M08100- SKU:
- 4782M08100
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE SIZE METRIC:
- 81.00 MM
- STROKE LENGTH METRIC:
- 63.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON DIAMETER METRIC:
- 80.95 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- RIDING STYLE:
- ATV
- DISPLACEMENT:
- 633 CC
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
$179.40 -
Wiseco Piston Kit Honda Pioneer 700 2014-2021 40066M10300
WISECO
$224.95If you're running a Honda Pioneer 700 and want measurable gains in throttle response and engine reliability, a quality piston kit is essential for sustained performance and longevity. Wiseco pistons are engineered to tighter tolerances than OEM...09103925- SKU:
- 09103925
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 82.60 MM
- BORE SIZE METRIC:
- 103.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 688 CC
- RIDING STYLE:
- UTV
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
WSM Piston Kit - Kawasaki 750 - +.50 mm 50-258-05K
WSM
$124.29If you're rebuilding or refreshing your Kawasaki 750 engine, piston quality directly impacts reliability, power output, and engine longevity. WSM's +.50mm piston kit delivers OEM-matching construction with performance-oriented refinements—particularly...09103546- SKU:
- 09103546
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- UTV
- UNITS:
- KIT
- MODEL:
- ORIGINAL
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 85.50 MM
$124.29 -
Wossner Piston Kit 95.50mm 11.7:1 Compression Suzuki LT-R450 2006-2009 8667DA
WOSSNER
$204.00When you're pushing your Suzuki LT-R450 to its limits, stock pistons become your bottleneck. The Wossner 8667DA delivers the strength and precision needed to handle aggressive riding and higher compression loads without sacrificing reliability. This...09104966- SKU:
- 09104966
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 95.45 MM
- BORE SIZE METRIC:
- 95.50 MM
- COMPRESSION RATIO IMPERIAL:
- 11.7:1
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$204.00Qty in Cart: 0Quantity:Price:$204.00Subtotal: -
Wiseco Piston Kit Honda TRX300EX 1993-2008 74mm 11:1 PK1030
WISECO
$244.95If you're rebuilding your Honda TRX300EX's top end, a quality piston kit is non-negotiable—it's the foundation of engine reliability and performance under load. The Wiseco PK1030 delivers forged-piston durability with precision-engineered tolerances that...09030313- SKU:
- 09030313
- Availability:
- Ships Same Business Day
- Weight:
- 1.59 LBS
- BORE SIZE METRIC:
- 76.00 MM
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 65.50 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- DISPLACEMENT:
- 282 CC
- PISTON DIAMETER METRIC:
- 75.95 MM
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- BORE - OVERSIZE:
- +2,00 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON SIZE METRIC:
- +2.00 MM
- TYPE:
- TOP END
$244.95Qty in Cart: 0Quantity:Price:$244.95Subtotal: -
Wiseco Yamaha YFM600FW Grizzly 4x4 1998-2001 Piston Kit PK1057
WISECO
$315.95Stock pistons are a common failure point in high-mileage Grizzly 600 builds, especially in demanding terrain or modified engines. Wiseco's precision-forged design delivers the thermal stability and durability needed to survive extended use without...09030314- SKU:
- 09030314
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- BORE SIZE METRIC:
- 95.00 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- DISPLACEMENT:
- 598 CC
- COMPRESSION RATIO IMPERIAL:
- 8.5:1
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 84.00 MM
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 94.92 MM
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
$315.95 -
Wiseco Piston Kit Yamaha YFM600FW Grizzly 4x4 1998-2001 PK1059
WISECO
$289.95If you're pushing your Grizzly 600 hard—whether on the trail or in competition—stock pistons won't survive sustained high-RPM abuse. This Wiseco kit delivers forged-piston durability with minimal thermal expansion, giving you the strength and reliability...09030315- SKU:
- 09030315
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.5:1
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 96.92 MM
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE METRIC:
- +2.00 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 97.00 MM
- DISPLACEMENT:
- 598 CC
- UNITS:
- KIT
- BORE - OVERSIZE:
- +2,00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PISTON SIZE METRIC:
- +2.00 MM
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 84.00 MM
$289.95 -
Wiseco Piston Kit Honda ATC 185 200 1981-1986 PK1000
WISECO
$235.95Factory pistons can't handle sustained high-RPM loads without risking catastrophic engine failure. The Wiseco Piston Kit delivers forged-aluminum durability and precision engineering that keeps your ATC running strong through demanding trail conditions...09030316- SKU:
- 09030316
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 65.00 MM
- PISTON DIAMETER METRIC:
- 64.95 MM
- TYPE:
- TOP END
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 10.25:1
- PISTON SIZE METRIC:
- +2.00 MM
- STROKE LENGTH METRIC:
- 57.80 MM
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE:
- +2,00 MM
- DISPLACEMENT:
- 191.8 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- ATV
$235.95 -
Wiseco Honda TRX300 FourTrax 1988-2000 Piston Kit PK1042
WISECO
$263.95When you're rebuilding a TRX300 engine, factory pistons won't cut it if you're pushing performance or running extended hours in demanding conditions. The Wiseco PK1042 delivers forged strength and thermal stability that keeps your engine reliable under...09030318- SKU:
- 09030318
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.25:1
- TYPE:
- TOP END
- DISPLACEMENT:
- 282 CC
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 74.00 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 73.95 MM
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 65.50 MM
$263.95Qty in Cart: 0Quantity:Price:$263.95Subtotal:
