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 Honda TRX250EX 2001-2008 69mm 0.50mm Oversize 10.5:1 Compression 4935M06900
WISECO
$189.95Stock pistons in your TRX250EX are a compromise between cost and performance—they limit your engine's potential and wear faster under aggressive riding conditions. The Wiseco 4935M06900 piston kit...09100857- SKU:
- 09100857
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 69.00 MM
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- MOLY COATED
- STROKE LENGTH METRIC:
- 62.20 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- DISPLACEMENT:
- 233 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$189.95Qty in Cart: 0Quantity:Price:$189.95Subtotal: -
Wiseco Piston Kit 102mm 11:1 Compression Yamaha YFM700R Raptor 2006-2014 4903M10200
WISECO
$249.95When you're pushing your Raptor 700R to its limits, stock pistons become the weak link. The Wiseco 102mm piston kit delivers the compression ratio and lightweight construction your engine needs to...09100861- SKU:
- 09100861
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- DISPLACEMENT:
- 686 CC
- SKIRT COATING:
- MOLY COATED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 102.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 84.00 MM
- UNITS:
- EACH
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
$249.95Qty in Cart: 0Quantity:Price:$249.95Subtotal: -
Wiseco Piston Kit Honda TRX250R 1985-1986 526M06850
WISECO
$229.95If you're running a Honda TRX250R and want to maximize engine efficiency without compromising reliability, the Wiseco Piston Kit is the direct path to increased power and smoother operation. Wiseco...09101212- SKU:
- 09101212
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BORE - OVERSIZE METRIC:
- +2.50 MM
- DISPLACEMENT:
- 246 CC
- PISTON MATERIAL:
- ALUMINUM
- STROKE LENGTH METRIC:
- 72.00 MM
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE - OVERSIZE:
- +2,50 MM
- BORE SIZE METRIC:
- 68.50 MM
- PRODUCT NAME:
- PISTON
$229.95Qty in Cart: 0Quantity:Price:$229.95Subtotal: -
Wiseco Piston Kit Standard Bore 78.50mm 8.8:1 Compression Honda TRX350 Rancher 4933M07850
WISECO
$189.95A worn or damaged piston directly compromises your TRX350 Rancher's combustion efficiency, throttle response, and overall engine reliability. The Wiseco Piston Kit restores factory performance while...09100854- SKU:
- 09100854
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 8.5:1
- STROKE LENGTH METRIC:
- 68.00 MM
- BORE SIZE METRIC:
- 78.50 MM
- DISPLACEMENT:
- 325 CC
- RIDING STYLE:
- ATV
- SKIRT COATING:
- MOLY COATED
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
$189.95Qty in Cart: 0Quantity:Price:$189.95Subtotal: -
Wiseco Piston Kit Standard Bore 10200mm 92:1 Compression Yamaha YFM700R Raptor 2006-2014 4902M10200
WISECO
$224.95If you're running a Raptor 700R, piston wear directly impacts combustion efficiency, throttle response, and overall engine longevity. The Wiseco Piston Kit Standard Bore 10200mm delivers...09100859- SKU:
- 09100859
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- MOLY COATED
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 84.00 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 686 CC
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 102.00 MM
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco Piston Kit for Polaris Sportsman 400 4x4 2001-2003 675M08325
WISECO
$184.95When your Polaris Sportsman 400's original piston shows wear, you're losing compression, efficiency, and power. The Wiseco Piston Kit (675M08325) restores your engine to peak performance with...09102806- SKU:
- 09102806
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- DISPLACEMENT:
- 400 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 83.25 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 70.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +0.50 MM
$184.95Qty in Cart: 0Quantity:Price:$184.95Subtotal: -
Wiseco Piston Kit 86.50mm for 2007-2014 Honda TRX420 Rancher 40050M08650
WISECO
$189.95Your Honda TRX420 Rancher's engine performance depends on reliable, precision-engineered internals. This Wiseco piston kit delivers the durability and combustion efficiency needed for consistent...09102820- SKU:
- 09102820
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 86.50 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- SKIRT COATING:
- MOLY COATED
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 420 CC
- STROKE LENGTH METRIC:
- 71.50 MM
$189.95Qty in Cart: 0Quantity:Price:$189.95Subtotal: -
Wiseco Piston Kit Honda TRX420 Rancher 2007-2019 87.00mm 40050M08700
WISECO
$210.95Stock pistons wear down under hard riding conditions, leading to compression loss and sluggish performance. The Wiseco Piston Kit for your Honda TRX420 Rancher restores factory compression while...09102821- SKU:
- 09102821
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 87.00 MM
- SKIRT COATING:
- MOLY COATED
- DISPLACEMENT:
- 425 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 71.50 MM
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
$210.95Qty in Cart: 0Quantity:Price:$210.95Subtotal: -
WSM Piston Kit 50-219-05K
WSM
$98.62A quality piston kit is the foundation of reliable engine performance, whether you're rebuilding after extensive track use or performing preventative maintenance on a high-mileage build. The WSM...09105215- SKU:
- 09105215
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +0,50 MM
- BORE SIZE METRIC:
- 74.50 MM
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
$98.62Qty in Cart: 0Quantity:Price:$98.62Subtotal: -
WSM Piston Kit 50-219-07K
WSM
$98.62A quality piston kit forms the foundation of reliable engine performance, especially under high-load conditions where OEM components may falter. The WSM Piston Kit 50-219-07K delivers OEM-equivalent...09105216- SKU:
- 09105216
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 75.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- PRODUCT NAME:
- PISTON KIT
$98.62Qty in Cart: 0Quantity:Price:$98.62Subtotal: -
WSM Piston Kit 50-227-04K
WSM
$110.29A properly functioning piston kit is critical to engine reliability and performance—whether you're rebuilding after high-mileage wear or upgrading to OEM-equivalent durability. The WSM Piston Kit...09105219- SKU:
- 09105219
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- BORE - OVERSIZE:
- +0,25 MM
- BORE - OVERSIZE METRIC:
- +0.25 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 90.25 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$110.29Qty in Cart: 0Quantity:Price:$110.29Subtotal: -
WSM Piston Kit 50-227-05K
WSM
$108.13A quality piston kit is the foundation of a reliable build—cheap pistons fail, premium ones last. The WSM 50-227-05K delivers OEM-matching construction with a refined E-clip design that eliminates...09105220- SKU:
- 09105220
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 90.50 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,50 MM
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$108.13Qty in Cart: 0Quantity:Price:$108.13Subtotal: -
WSM Piston Kit 50-218-04K
WSM
$116.05A precision piston kit is essential for maintaining peak engine performance and reliability, especially in high-demand racing and performance applications. The WSM Piston Kit 50-218-04K delivers...09105225- SKU:
- 09105225
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.25 MM
- BORE SIZE METRIC:
- 92.25 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +0,25 MM
$116.05Qty in Cart: 0Quantity:Price:$116.05Subtotal: -
WSM Piston Kit 50-218-05K
WSM
$116.05A quality piston kit is foundational to reliable engine performance, especially if you're running increased boost levels or extended RPM ranges where factory pistons fall short. The WSM 50-218-05K...09105226- SKU:
- 09105226
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- BORE - OVERSIZE:
- +0,50 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 92.50 MM
- PRODUCT NAME:
- PISTON KIT
$116.05Qty in Cart: 0Quantity:Price:$116.05Subtotal: -
WSM Piston Kit 50-234K
WSM
$142.04Piston failure mid-race isn't just costly—it's race-ending. The WSM Piston Kit 50-234K delivers OEM-matched quality with a refined E-clip design that eliminates the weak point in your engine's...09105230- SKU:
- 09105230
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 102.00 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- UNITS:
- KIT
$142.04Qty in Cart: 0Quantity:Price:$142.04Subtotal: -
WSM Piston Kit 50-234-04K
WSM
$142.04A quality piston kit is the foundation of reliable engine performance, and the WSM 50-234-04K delivers OEM-equivalent construction without compromise. Whether you're rebuilding after a failure or...09105231- SKU:
- 09105231
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- BORE SIZE METRIC:
- 102.25 MM
- RIDING STYLE:
- ATV
- BORE - OVERSIZE METRIC:
- +0.25 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,25 MM
- PRODUCT NAME:
- PISTON KIT
$142.04Qty in Cart: 0Quantity:Price:$142.04Subtotal: -
WSM Piston Kit 50-257K
WSM
$98.62High-quality pistons are the foundation of reliable engine performance, especially under sustained high-RPM operation or forced induction. The WSM Piston Kit 50-257K delivers OEM-equivalent...09105235- SKU:
- 09105235
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 74.00 MM
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- STANDARD
- UNITS:
- KIT
$98.62Qty in Cart: 0Quantity:Price:$98.62Subtotal: -
WSM Piston Kit - Honda 300 - +.50 mm 50-223-05K
WSM
$98.62When you're pushing your Honda 300 to the limit, stock pistons become your weak point. The WSM Piston Kit delivers OEM-grade quality with engineered improvements—specifically the MOS2 coating on the...09103475- SKU:
- 09103475
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- MODEL:
- ORIGINAL
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 74.50 MM
$98.62Qty in Cart: 0Quantity:Price:$98.62Subtotal: -
WSM Piston Kit - Honda 400 - Standard 50-228K
WSM
$122.25If you're rebuilding a Honda 400 engine, piston quality directly impacts compression, heat dissipation, and overall reliability under load. WSM's piston kit delivers OEM-equivalent construction with...09103483- SKU:
- 09103483
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE SIZE METRIC:
- 85.00 MM
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- ORIGINAL
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$122.25Qty in Cart: 0Quantity:Price:$122.25Subtotal: -
PROX Piston Kit 01.2436.A
PROX
$210.95Factory-worn pistons sacrifice ring seal and combustion efficiency—costing you power and reliability. The PROX Piston Kit 01.2436.A delivers OEM-specification performance without compromise,...09101196- SKU:
- 09101196
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE SIZE METRIC:
- 94.95 MM
- PISTON SIZE METRIC:
- STANDARD SIZE A
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 94.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$210.95
