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
-
On Sale
Wiseco Piston Kit Honda ATC350X 1985-1986 4393M08100
WISECO
MSRP: $202.95Now: $166.00Was: $202.95The Wiseco Piston Kit is engineered to restore or upgrade your Honda ATC350X with factory-spec reliability and enhanced durability. If you're serious about trail performance or planning race-oriented modifications, a quality piston kit is fundamental—it...4393M08100- SKU:
- 4393M08100
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.25:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- DISPLACEMENT:
- 350.4 CC
- PISTON DIAMETER METRIC:
- 80.95 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 81.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 68.00 MM
MSRP: $202.95Now: $166.00Was: $202.95 -
WSM Piston Kit - Kawasaki 300 - +.25 mm 50-255-04K
WSM
$96.69When you're pushing a Kawasaki 300 to its limit, stock pistons become a liability. The WSM Piston Kit delivers OEM-quality construction with critical performance upgrades—specifically the MOS2 coating that actively dissipates heat and reduces friction,...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
$103.55Stock pistons can't handle sustained high RPM or aggressive tuning without accelerated wear and heat-related failure. The WSM Piston Kit delivers OEM-equivalent quality with performance-driven enhancements—MOS2-coated skirts reduce friction and draw heat...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
$103.55If you're rebuilding a Kawasaki 300 engine or pushing for more power and reliability, a quality piston kit is non-negotiable. The WSM +.75mm piston kit delivers OEM-matching quality with genuine performance upgrades—specifically the MOS2 coating on the...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
$103.55If you're building serious displacement on your Kawasaki 300, piston quality directly determines how long your engine survives at high RPM. WSM's +1mm piston kit delivers OEM-equivalent construction with critical upgrades—a hardened crown for ring groove...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
$103.55The WSM Piston Kit for Yamaha 350 is engineered to deliver reliable performance that meets or exceeds OEM specifications, making it the ideal choice for riders who demand durability without compromise. The advanced MOS2 coating on the skirts actively...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
$103.55If you're pushing a Yamaha 350 to its limits, stock pistons won't cut it. The WSM Piston Kit delivers OEM-quality construction with genuine performance upgrades—better ring groove durability, reduced friction, and improved heat management that translates...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
$103.55If you're rebuilding or refreshing your Yamaha 350, piston quality directly impacts engine reliability, power delivery, and longevity. WSM's +.50 mm piston kit delivers OEM-equivalent construction with engineering improvements—particularly the...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 91.95 mm Honda Talon 1000R 2019-2022 K8973DA-2
WOSSNER
$428.00If you're running your Honda Talon 1000R at the limit, factory pistons won't cut it. The Wossner K8973DA-2 is engineered for the demands of serious off-road and racing applications, delivering the durability and precision you need when every horsepower...09106649- SKU:
- 09106649
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$428.00 -
Wossner Piston Kit for Polaris 250 Trail Boss 1985-2005 8094D200
WOSSNER
$132.00The Wossner Piston Kit 8094D200 is engineered to restore lost compression, reduce blow-by, and unlock the full potential of your Polaris 250 Trail Boss engine. Whether you're rebuilding after high-mileage wear or upgrading for trail performance, this...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
$122.00Stock pistons in your Polaris 250 Trail Boss can't handle sustained high-RPM running or modified engine builds—they'll fail when you need reliability most. The Wossner 8094DA delivers the durability and precision engineering you need to keep your...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
$132.00If you're running a 2-stroke Yamaha RD or YFZ Banshee at the limit, piston failure isn't just inconvenient—it's expensive. The Wossner 8075D200 is engineered to handle the thermal stress and combustion pressures that stock pistons simply can't sustain,...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
$132.00Qty in Cart: 0Quantity:Price:$132.00Subtotal: -
On Sale
Wiseco Piston Kit Yamaha YFM660R 2001-2005 102mm 11:1 4811M10200
WISECO
MSRP: $274.95Now: $234.00Was: $274.95If you're running a Yamaha YFM660R and want to extract genuine performance gains, a properly-sized piston kit is fundamental—this Wiseco unit delivers the overbore capacity and compression ratio needed for noticeably improved power delivery. Forged...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: $349.95If you're running your TRX450R hard on the track or trail, factory pistons won't cut it. The Wiseco PK1413 piston kit delivers the strength and thermal stability you need to push higher RPMs without sacrificing reliability. This complete rebuild kit...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: $199.95Whether you're rebuilding after engine wear or upgrading for increased displacement, the Wiseco Piston Kit delivers the precision engineering your KVF750 demands. This standard bore 85mm piston maintains the 11.5:1 compression ratio while offering...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
$122.00If you're running a Yamaha YFZ350 Banshee hard, factory pistons won't cut it—you need a kit engineered for sustained high RPM reliability. Wossner's 4032 T6 forged aluminum construction and friction-reducing skirt coating deliver the durability and...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
$164.00Your Honda TRX420 Rancher demands a piston kit engineered for real-world durability and consistent performance—not marketing promises. The Wossner 8869DA delivers German precision engineering with 4032 T6 forged aluminum construction that handles...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: -
VERTEX Piston Kit 23638B
VERTEX
$268.95The VERTEX Piston Kit 23638B delivers the reliability and performance you need for serious engine builds. Whether you're rebuilding a two-stroke or four-stroke, this kit provides everything required for a complete top-end refresh—pistons, rings, wrist...09102125- SKU:
- 09102125
- Availability:
- Ships Same Business Day
- Weight:
- 1.29 LBS
$268.95Qty in Cart: 0Quantity:Price:$268.95Subtotal: -
VERTEX Piston Kit 23531B
VERTEX
$271.95Piston durability and ring sealing directly impact your engine's power output and longevity—especially under high boost or sustained RPM. The VERTEX 23531B delivers the metallurgical reliability you need through advanced heat-treatment processes and...09101967- 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
$271.95Qty in Cart: 0Quantity:Price:$271.95Subtotal: -
VERTEX Piston Kit 23523B
VERTEX
$316.95The VERTEX Piston Kit 23523B delivers the durability and precision you need for sustained high-RPM performance. Whether you're rebuilding an engine for track duty or maximizing reliability in a modified build, these pistons are engineered to handle the...09101970- 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
$316.95Qty in Cart: 0Quantity:Price:$316.95Subtotal:
