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 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 -
PROX Piston Kit 01.2487.100
PROX
$99.95Your engine's heart needs precision components that can handle high RPM demands and sustained performance. The PROX Piston Kit 01.2487.100 delivers OEM-spec reliability with the exacting tolerances...09101200- SKU:
- 09101200
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
- BORE SIZE METRIC:
- 84.00 MM
- PRODUCT NAME:
- PISTON KIT
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 84.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- +1.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$99.95Qty in Cart: 0Quantity:Price:$99.95Subtotal: -
PROX Piston Kit 01.2706.C
PROX
$149.95Piston failure doesn't happen gradually—it happens catastrophically, taking your engine with it. The PROX Piston Kit 01.2706.C delivers OEM-equivalent reliability with Japanese manufacturing...09101203- SKU:
- 09101203
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- BORE SIZE METRIC:
- 101.96 MM
- PISTON SIZE METRIC:
- STANDARD SIZE C
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON DIAMETER METRIC:
- 101.96 MM
- RIDING STYLE:
- UTV
$149.95Qty in Cart: 0Quantity:Price:$149.95Subtotal:
