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
-
WSM Piston Kit - Kawasaki 300 - +.25 mm 50-255-04K
WSM
$96.69Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103509- SKU:
- 09103509
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- MODEL:
- ORIGINAL
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,25 MM
- BORE - OVERSIZE METRIC:
- +0.25 MM
- BORE SIZE METRIC:
- 76.25 MM
- PRODUCT NAME:
- PISTON KIT
$96.69 -
WSM Piston Kit - Kawasaki 300 - +.50 mm 50-255-05K
WSM
$103.55Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103510- SKU:
- 09103510
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 76.50 MM
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE:
- +0,50 MM
- MODEL:
- ORIGINAL
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$103.55 -
WSM Piston Kit - Kawasaki 300 - +.75 mm 50-255-06K
WSM
$103.55Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103511- SKU:
- 09103511
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- MODEL:
- ORIGINAL
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +0,75 MM
- BORE - OVERSIZE METRIC:
- +0.75 MM
- BORE SIZE METRIC:
- 76.75 MM
$103.55 -
WSM Piston Kit - Kawasaki 300 - +1 mm 50-255-07K
WSM
$103.55Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103512- SKU:
- 09103512
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 77.00 MM
- MODEL:
- ORIGINAL
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
$103.55 -
WSM Piston Kit - Yamaha 350 - Standard 50-540K
WSM
$103.55Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103513- SKU:
- 09103513
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 83.00 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- ORIGINAL
- RIDING STYLE:
- ATV
$103.55 -
WSM Piston Kit - Yamaha 350 - +.25 mm 50-540-04K
WSM
$103.55Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103514- SKU:
- 09103514
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- MODEL:
- ORIGINAL
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +0,25 MM
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE METRIC:
- +0.25 MM
- BORE SIZE METRIC:
- 83.25 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$103.55 -
WSM Piston Kit - Yamaha 350 - +.50 mm 50-540-05K
WSM
$103.55Quality and construction that meets or exceeds OEM, Feature improved E-clip design, Contain piston, rings, pin and clips, Additional rings available separately, Order one per cylinder, Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce...09103515- SKU:
- 09103515
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- MODEL:
- ORIGINAL
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +0,50 MM
- PISTON MATERIAL:
- ALUMINUM
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 83.50 MM
- PRODUCT NAME:
- PISTON KIT
$103.55 -
Wossner Piston Kit for Polaris 250 Trail Boss 1985-2005 8094D200
WOSSNER
$132.00Elevate your engine's performance with the WOSSNER Piston Kit 8094D200, designed for 2-stroke applications. This premium piston kit combines cutting-edge engineering and high-quality materials to deliver exceptional durability, reduced friction, and...09105513- SKU:
- 09105513
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE - OVERSIZE:
- +2,00 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 73.93 MM
- RIDING STYLE:
- ATV
- DISPLACEMENT:
- 244 CC
- TYPE:
- DUAL RING
- BORE SIZE METRIC:
- 74.00 MM
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
$132.00Qty in Cart: 0Quantity:Price:$132.00Subtotal: -
Wossner Piston Kit for Polaris 250 Trail Boss 1985-2005 8094DA
WOSSNER
$122.00Elevate your engine's performance with the WOSSNER Piston Kit 8094DA, designed specifically for two-stroke applications. Crafted from high-quality materials, this piston kit ensures optimal efficiency and durability, making it an essential upgrade for...09105514- SKU:
- 09105514
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 71.93 MM
- UNITS:
- KIT
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- TYPE:
- DUAL RING
- DISPLACEMENT:
- 244 CC
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Piston Kit Yamaha RD350 1973-1975 RD400 1976-1979 RZ350 1984-1985 YFZ350 Banshee 1987-2006 8075D200
WOSSNER
$132.00Experience unparalleled performance with the WOSSNER Piston Kit 8075D200, engineered for 2-stroke engines. This premium piston kit combines advanced materials and innovative design to enhance your engine's efficiency and longevity. Complete Kit:...09104796- SKU:
- 09104796
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 65.94 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- DISPLACEMENT:
- 347 CC
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- +2,00 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 66.00 MM
- DISPLACEMENT:
- 398 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
$132.00 -
On Sale
Wiseco Piston Kit Yamaha YFM660R 2001-2005 102mm 11:1 4811M10200
WISECO
MSRP: $274.95Now: $234.00Was: $274.95Enhance your engine's performance with the WISECO Piston Kit, designed for precision and durability. This kit offers a +2.00 mm increase in piston size, ensuring improved power and efficiency. Please note that the gasket kit is sold separately, allowing...09100287- SKU:
- 09100287
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 84.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 102.00 MM
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- ARMORGLIDE®
- BORE - OVERSIZE METRIC:
- +2.00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 686 CC
- PISTON MATERIAL:
- FORGED
MSRP: $274.95Now: $234.00Was: $274.95Qty in Cart: 0Quantity:Price:MSRP: $274.95Now: $234.00Was: $274.95Subtotal: -
On Sale
Wiseco Piston Kit for Honda TRX450R 2006-2009 PK1413
WISECO
MSRP: $349.95Now: $297.00Was: $349.95Elevate your engine's performance with the WISECO Piston Kit, designed specifically for 2-cycle engines. Crafted from high-silicone forged materials, this kit ensures exceptional strength and minimal thermal expansion, making it ideal for...09030479- SKU:
- 09030479
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- PISTON DIAMETER METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
- STROKE LENGTH METRIC:
- 64.80 MM
- UNITS:
- KIT
- BORE SIZE METRIC:
- 96.00 MM
- PRODUCT NAME:
- REBUILD KIT
- DISPLACEMENT:
- 450 CC
- MODEL:
- FORGED SERIES
MSRP: $349.95Now: $297.00Was: $349.95Qty in Cart: 0Quantity:Price:MSRP: $349.95Now: $297.00Was: $349.95Subtotal: -
On Sale
Wiseco Piston Kit Standard Bore 85mm 11.5:1 Compression Kawasaki KVF750 Brute Force 2005-2011 4897M08500
WISECO
MSRP: $199.95Now: $170.00Was: $199.95Enhance the performance of your Brute Force or Teryx 750 with the WISECO Piston Kit. Engineered for durability and precision, this piston kit is designed to deliver optimal power and efficiency. Please note that the kit does not include a gasket set,...09102842- SKU:
- 09102842
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 85.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 11.5:1
- DISPLACEMENT:
- 749 CC
- RIDING STYLE:
- UTV
- STROKE LENGTH METRIC:
- 66.00 MM
MSRP: $199.95Now: $170.00Was: $199.95Qty in Cart: 0Quantity:Price:MSRP: $199.95Now: $170.00Was: $199.95Subtotal: -
Wossner Piston Kit 64.69mm Yamaha YFZ350 Banshee 1987-2006 8075D075
WOSSNER
$122.00Experience enhanced performance and reliability with the WOSSNER Piston Kit 8075D075, expertly engineered for 2-stroke engines. This premium kit includes everything you need for a seamless installation, ensuring optimal operation and longevity in...09104792- SKU:
- 09104792
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE:
- +0,75 MM
- PISTON SIZE METRIC:
- 64.69 MM
- RIDING STYLE:
- STREET
- MODEL:
- STANDARD SERIES
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.75 MM
- BORE SIZE METRIC:
- 64.75 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- DISPLACEMENT:
- 347 CC
- DISPLACEMENT:
- 398 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- ATV
$122.00Qty in Cart: 0Quantity:Price:$122.00Subtotal: -
Wossner Piston Kit Honda TRX420 Rancher 2007-2025 8869DA
WOSSNER
$164.00Elevate your Honda TRX 420's performance with the WOSSNER Piston Kit, meticulously engineered for optimal efficiency and durability. This premium piston kit is designed to enhance engine performance while minimizing friction and noise, ensuring a...09106113- SKU:
- 09106113
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- PISTON SIZE METRIC:
- 86.45 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 86.50 MM
- COMPRESSION RATIO IMPERIAL:
- 9.9:1
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PRO SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
$164.00Qty in Cart: 0Quantity:Price:$164.00Subtotal: -
On Sale
VERTEX Piston Kit 23638B
VERTEX
MSRP: $268.95Now: $242.06Was: $268.95All pistons are heat treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity cast aluminum alloy (not...09102125- SKU:
- 09102125
- Availability:
- Ships Same Business Day
- Weight:
- 1.29 LBS
MSRP: $268.95Now: $242.06Was: $268.95Qty in Cart: 0Quantity:Price:MSRP: $268.95Now: $242.06Was: $268.95Subtotal: -
On Sale
VERTEX Piston Kit 23531B
VERTEX
MSRP: $271.95Now: $244.76Was: $271.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09101967- SKU:
- 09101967
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON DIAMETER METRIC:
- 96.97 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +3.00 MM
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- DISPLACEMENT:
- 480 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- BORE - OVERSIZE:
- +3,00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- FORGED BIG BORE
MSRP: $271.95Now: $244.76Was: $271.95Qty in Cart: 0Quantity:Price:MSRP: $271.95Now: $244.76Was: $271.95Subtotal: -
On Sale
VERTEX Piston Kit 23523B
VERTEX
MSRP: $316.95Now: $285.26Was: $316.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09101970- SKU:
- 09101970
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- FORGED BIG BORE
- BORE - OVERSIZE:
- +3,00 MM
- DISPLACEMENT:
- 477 CC
- BORE - OVERSIZE METRIC:
- +3.00 MM
- CYLINDER DIAMETER METRIC:
- 99.00 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- PISTON DIAMETER METRIC:
- 98.96 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
MSRP: $316.95Now: $285.26Was: $316.95Qty in Cart: 0Quantity:Price:MSRP: $316.95Now: $285.26Was: $316.95Subtotal: -
On Sale
VERTEX Piston Kit 23549A
VERTEX
MSRP: $315.95Now: $284.36Was: $315.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09101740- SKU:
- 09101740
- Availability:
- Ships Same Business Day
- Weight:
- 0.99 LBS
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- DISPLACEMENT:
- 450 CC
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PISTON DIAMETER METRIC:
- 95.95 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
MSRP: $315.95Now: $284.36Was: $315.95 -
On Sale
VERTEX Piston Kit 24398B
VERTEX
MSRP: $182.95Now: $164.66Was: $182.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity-cast aluminum alloy (not...09103829- SKU:
- 09103829
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- DISPLACEMENT:
- 1000 CC
- RIDING STYLE:
- UTV
- STYLE:
- CAST REPLICA
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 92.97 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
MSRP: $182.95Now: $164.66Was: $182.95Qty in Cart: 0Quantity:Price:MSRP: $182.95Now: $164.66Was: $182.95Subtotal:
