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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Wossner 68.44mm Piston Kit for Suzuki LT250R QuadRacer 1985-1986 8259D150
WOSSNER
$172.00If you're running a Suzuki LT250R QuadRacer at the limit, your piston kit is engineered to handle the extreme combustion pressures and temperatures of 2-stroke racing. The Wossner 8259D150 delivers the durability and precision you need to maintain peak...09105586- SKU:
- 09105586
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE SIZE METRIC:
- 68.50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 68.44 MM
- RIDING STYLE:
- ATV
- BORE - OVERSIZE METRIC:
- +1.50 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- +1,50 MM
- MODEL:
- STANDARD SERIES
- UNITS:
- KIT
$172.00Qty in Cart: 0Quantity:Price:$172.00Subtotal: -
WSM Piston Kit 50-222-07K
WSM
$72.41A quality piston kit is the foundation of reliable engine performance, and the WSM Piston Kit 50-222-07K delivers OEM-equivalent construction with proven durability for demanding applications. Whether you're rebuilding a tired engine or building a fresh...09105212- SKU:
- 09105212
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 66.00 MM
$72.41Qty in Cart: 0Quantity:Price:$72.41Subtotal: -
WSM Piston Kit 50-222-09K
WSM
$68.96A piston kit forms the foundation of reliable engine performance, and the WSM Piston Kit 50-222-09K delivers OEM-equivalent quality with proven durability. Whether you're rebuilding after a race weekend or maintaining peak performance in your daily...09105213- SKU:
- 09105213
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE METRIC:
- 66.50 MM
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +1.50 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +1,50 MM
- RIDING STYLE:
- OFF-ROAD
$68.96Qty in Cart: 0Quantity:Price:$68.96Subtotal: -
WSM Piston Kit 50-251K
WSM
$157.82A quality piston kit is fundamental to engine reliability and performance—this is where combustion efficiency begins. The WSM Piston Kit 50-251K delivers OEM-equivalent construction with a refined E-clip design that reduces the risk of pin retention...09105241- SKU:
- 09105241
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 81.00 MM
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$157.82Qty in Cart: 0Quantity:Price:$157.82Subtotal: -
WSM Piston Kit 50-251-04K
WSM
$157.82If you're rebuilding an engine or replacing worn pistons, you need a kit that matches OEM quality without compromise. The WSM Piston Kit 50-251-04K delivers complete piston assemblies engineered to exact specifications, ensuring reliable performance...09105242- SKU:
- 09105242
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE - OVERSIZE:
- +0,25 MM
- BORE - OVERSIZE METRIC:
- +0.25 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 81.25 MM
- UNITS:
- KIT
$157.82Qty in Cart: 0Quantity:Price:$157.82Subtotal: -
WSM Piston Kit 50-251-05K
WSM
$165.71A quality piston kit forms the foundation of reliable engine performance, and compromises here directly impact durability under load. The WSM Piston Kit 50-251-05K delivers OEM-grade construction with a refined E-clip design that reduces failure points...09105243- SKU:
- 09105243
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 81.50 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- UNITS:
- KIT
$165.71 -
WSM Piston Kit 50-320K
WSM
$135.90A quality piston kit is the foundation of reliable engine performance, and the WSM Piston Kit 50-320K delivers OEM-grade construction with measurable improvements where it matters most. The enhanced E-clip design reduces the risk of pin retention...09105249- SKU:
- 09105249
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- BORE - OVERSIZE:
- STANDARD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- UTV
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
$135.90 -
WSM Piston Kit 50-605-04K
WSM
$70.98A quality piston kit is critical for engine reliability and performance—especially under high RPM and boost conditions. The WSM Piston Kit 50-605-04K delivers OEM-equivalent construction with a refined E-clip design that reduces the risk of pin failure...09105252- SKU:
- 09105252
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE SIZE METRIC:
- 86.25 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- BORE - OVERSIZE:
- +0,25 MM
- BORE - OVERSIZE METRIC:
- +0.25 MM
- PRODUCT NAME:
- PISTON KIT
$70.98Qty in Cart: 0Quantity:Price:$70.98Subtotal: -
WSM Piston Kit 50-541K
WSM
$96.62Whether you're rebuilding after a catastrophic failure or proactively upgrading your engine internals, the WSM Piston Kit 50-541K delivers OEM-equivalent quality with measurable improvements to reliability. The enhanced E-clip design reduces the risk of...09105254- SKU:
- 09105254
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE SIZE METRIC:
- 83.00 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
$96.62Qty in Cart: 0Quantity:Price:$96.62Subtotal: -
WSM Piston Kit - Honda 400 - Standard 50-220K
WSM
$108.50If you're rebuilding a Honda 400 engine, piston quality directly impacts reliability, power output, and engine longevity. WSM's piston kit delivers OEM-equivalent construction with several performance-focused upgrades that reduce friction, manage heat...09103468- SKU:
- 09103468
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- ORIGINAL
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- BORE SIZE METRIC:
- 86.00 MM
- PRODUCT NAME:
- PISTON KIT
$108.50Qty in Cart: 0Quantity:Price:$108.50Subtotal: -
WSM Piston Kit - Yamaha 350 - +1 mm 50-540-07K
WSM
$96.69If you're rebuilding your Yamaha 350 or chasing reliable power gains, a quality piston kit is non-negotiable—it's the foundation of cylinder pressure, combustion efficiency, and engine longevity. The WSM +1mm piston kit delivers OEM-equivalent...09103517- SKU:
- 09103517
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 84.00 MM
- MODEL:
- ORIGINAL
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- PRODUCT NAME:
- PISTON KIT
$96.69Qty in Cart: 0Quantity:Price:$96.69Subtotal: -
WSM Piston Kit - Polaris 300 - Standard 50-310PK
WSM
$92.76Stock pistons wear quickly under racing conditions, leading to lost compression and power. The WSM Piston Kit for Polaris 300 delivers OEM-equivalent quality with engineered improvements—including an advanced E-clip design and MOS2-coated skirts that...09103518- SKU:
- 09103518
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE SIZE METRIC:
- 74.50 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- ORIGINAL
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM
$92.76Qty in Cart: 0Quantity:Price:$92.76Subtotal: -
WSM Piston Kit - Honda 420 - +.50 mm 50-231-05K
WSM
$111.09When you're rebuilding a Honda 420 engine, piston selection directly impacts reliability, heat management, and power output. WSM's +.50 mm oversized pistons deliver OEM-equivalent quality with engineering refinements—particularly the MOS2 coating and...09103525- SKU:
- 09103525
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
- MODEL:
- ORIGINAL
- RIDING STYLE:
- ATV
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 87.00 MM
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE:
- +0,50 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$111.09Qty in Cart: 0Quantity:Price:$111.09Subtotal: -
WSM Piston Kit - Honda 420 - +.75 mm 50-231-06K
WSM
$105.80When you're pushing your Honda 420 to the limit, factory pistons become the weak link in your build. The WSM Piston Kit delivers OEM-quality construction with engineering upgrades specifically designed to handle elevated boost, higher RPMs, and sustained...09103526- SKU:
- 09103526
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MODEL:
- ORIGINAL
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +0,75 MM
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE METRIC:
- +0.75 MM
- BORE SIZE METRIC:
- 87.25 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$105.80Qty in Cart: 0Quantity:Price:$105.80Subtotal: -
WSM Piston Kit - Yamaha 660 - Standard 50-544K
WSM
$114.38A piston kit is the heart of your engine's combustion cycle—wear or damage here directly impacts power output, reliability, and longevity. WSM's piston kits for the Yamaha 660 are engineered to meet or exceed OEM specifications with advanced materials...09103528- SKU:
- 09103528
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- BORE SIZE METRIC:
- 100.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- ORIGINAL
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- RIDING STYLE:
- UTV
- PISTON MATERIAL:
- ALUMINUM
$114.38Qty in Cart: 0Quantity:Price:$114.38Subtotal: -
WSM Piston Kit - Yamaha 660 - +.50 mm 50-544-05K
WSM
$120.10Stock pistons can't handle the demands of high-performance riding, especially when you're pushing your Yamaha 660 to its limits. The WSM Piston Kit delivers OEM-quality construction with critical performance upgrades—superior ring groove hardening and...09103529- SKU:
- 09103529
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
- BORE SIZE METRIC:
- 100.50 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- UTV
- BORE - OVERSIZE:
- +0,50 MM
- MODEL:
- ORIGINAL
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PISTON MATERIAL:
- ALUMINUM
$120.10 -
On Sale
Wiseco Piston Kit 67mm Bore 1985-1986 Honda ATC250R TRX250R PK1077
WISECO
MSRP: $259.95Now: $221.00Was: $259.95If you're rebuilding the top end of your Honda ATC250R or TRX250R, you need pistons engineered to handle sustained high RPM and aggressive riding conditions. Wiseco's forged aluminum construction resists thermal expansion and fatigue, keeping your engine...09030341- SKU:
- 09030341
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- TYPE:
- TOP END
- MODEL:
- PRO-LITE
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 67.00 MM
- DISPLACEMENT:
- 246 CC
- RIDING STYLE:
- ATV
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- PISTON DIAMETER METRIC:
- 66.92 MM
- PRODUCT NAME:
- REBUILD KIT
MSRP: $259.95Now: $221.00Was: $259.95Qty in Cart: 0Quantity:Price:MSRP: $259.95Now: $221.00Was: $259.95Subtotal: -
On Sale
Wiseco Piston Kit for Suzuki LT80 1987-2006 PK1099
WISECO
MSRP: $182.95Now: $144.00Was: $182.95The stock piston in your LT80 is the weak link holding back peak performance and reliability. Wiseco's forged piston kit delivers the strength needed for sustained high RPM operation and competitive riding, while the matched ring set and complete gasket...09030343- SKU:
- 09030343
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE METRIC:
- 50.00 MM
- TYPE:
- TOP END
- UNITS:
- KIT
- DISPLACEMENT:
- 82 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- ATV
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 42.00 MM
- PISTON DIAMETER METRIC:
- 49.92 MM
- PRODUCT NAME:
- REBUILD KIT
MSRP: $182.95Now: $144.00Was: $182.95 -
On Sale
Wiseco Piston Kit Yamaha YFS200 Blaster 1988-2006 68.25mm 573M06825
WISECO
MSRP: $166.95Now: $132.00Was: $166.95When your Yamaha YFS200 Blaster's original pistons show wear, compression loss and power degradation follow. The Wiseco 573M06825 piston kit restores—and can exceed—factory performance with precision-engineered construction and lightweight materials that...09102802- SKU:
- 09102802
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE SIZE METRIC:
- 68.25 MM
- MODEL:
- PRO-LITE
- BORE - OVERSIZE:
- +2,25 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 57.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +2.25 MM
- DISPLACEMENT:
- 209 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
MSRP: $166.95Now: $132.00Was: $166.95 -
On Sale
Wiseco Piston Kit 81.00mm for Honda FL400R Pilot 1989-1990 577M08100
WISECO
MSRP: $204.95Now: $174.00Was: $204.95If you're running a Honda FL400R Pilot and want to restore lost compression or build more power, a quality piston kit is non-negotiable. The Wiseco 81.00mm Piston Kit is precision-engineered to tighter tolerances than OEM replacements, delivering...09102804- SKU:
- 09102804
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE SIZE METRIC:
- 81.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- RIDING STYLE:
- UTV
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 79.00 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 397 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM
MSRP: $204.95Now: $174.00Was: $204.95Qty in Cart: 0Quantity:Price:MSRP: $204.95Now: $174.00Was: $204.95Subtotal:
