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Dirt Bike Piston and Ring Kits

Dirt Bike Piston and Ring Kits

Dirt Bike Piston and Ring Kits

Dirt Bike Piston & Ring Kits for Yamaha YZ85, WR250 & YZ250 at JJ Motorsports

Rebuild your dirt bike's top end for maximum power and reliability with premium piston and ring kits from JJ Motorsports, forged from high-strength aluminum for superior heat resistance, lightweight performance, and precise fit in motocross, enduro, and trail riding. Our selection includes complete kits with pistons, high-performance rings, wrist pins, circlips, top-end bearings, and gaskets designed for enhanced combustion efficiency, reduced blow-by, and longer engine life under high-RPM abuse. Compatible with popular models like Yamaha YZ85 (2002-2018), WR250, and YZ250, these Wiseco-engineered components feature CNC-machined crowns for optimal cam shape, ArmorGlide skirt coatings for low friction, and 4032 alloy construction for durability in dusty, aggressive conditions. Whether you're refreshing a youth 85cc 2-stroke or upgrading a 250cc big bore, these kits ensure crisp throttle response, better sealing, and race-ready power without the need for custom boring—perfect for DIY rebuilds or pro-level maintenance.

Shop trusted brands like Wiseco for race-proven quality. Explore related categories such as dirt bike engine for cylinders and valves or dirt bike air and fuel for carburetors and jets.

Top Dirt Bike Piston & Ring Kits

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
  • Wossner Piston Kit 53.96mm Yamaha YZ125 1998-2001 8091DB

    Wossner Piston Kit 53.96mm Yamaha YZ125 1998-2001 8091DB

    WOSSNER

    $122.00
    The stock piston in your YZ125 can't handle the demands of aggressive riding—wear accelerates, blow-by increases, and power delivery suffers. This Wössner 8091DB kit restores your engine to peak performance with OEM-quality components engineered to...
    09104820
    SKU:
    09104820
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    DISPLACEMENT:
    124 CC
    ENGINE TYPE:
    2-STROKE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SINGLE RING
    UNITS:
    KIT
    BORE SIZE METRIC:
    54.01 MM
    BORE - OVERSIZE:
    +0,01 MM
    BORE - OVERSIZE METRIC:
    +0.01 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    MODEL:
    STANDARD SERIES
    PISTON SIZE METRIC:
    53.96 MM
    PRODUCT NAME:
    PISTON KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $122.00
    Subtotal:
  • Wossner Piston Kit 65.94mm Kawasaki KDX200 1986-2006 8093DA

    Wossner Piston Kit 65.94mm Kawasaki KDX200 1986-2006 8093DA

    WOSSNER

    $142.00
    If you're running a KDX200 and want to restore lost compression or upgrade to a higher-displacement setup, a quality piston kit is non-negotiable. The Wossner 8093DA delivers the precision engineering and durability you need for consistent power delivery...
    09104822
    SKU:
    09104822
    Availability:
    Ships Same Business Day
    Weight:
    0.70 LBS
    UNITS:
    KIT
    MODEL:
    STANDARD SERIES
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    66.00 MM
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    65.94 MM
    PRODUCT NAME:
    PISTON KIT
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    DISPLACEMENT:
    198 CC
    PISTON MATERIAL:
    FORGED
    TYPE:
    DUAL RING
    Qty in Cart: 0
    Quantity:
    Price:
    $142.00
    Subtotal:
  • Wossner Piston Kit Suzuki RM125 2004-2007 8098DA

    Wossner Piston Kit Suzuki RM125 2004-2007 8098DA

    WOSSNER

    $142.00
    The Wossner Piston Kit 8098DA is engineered specifically for the Suzuki RM125 (2004-2007) to restore or enhance your 2-stroke's performance with OEM-quality reliability. The premium 4032 T6 forged aluminum construction delivers superior heat resistance...
    09104823
    SKU:
    09104823
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    BORE SIZE METRIC:
    54.00 MM
    TYPE:
    SINGLE RING
    ENGINE TYPE:
    2-STROKE
    PRODUCT NAME:
    PISTON KIT
    DISPLACEMENT:
    124 CC
    MODEL:
    STANDARD SERIES
    PISTON SIZE METRIC:
    53.95 MM
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    Qty in Cart: 0
    Quantity:
    Price:
    $142.00
    Subtotal:
  • Wossner Suzuki RM125 2004-2007 53.96mm Piston Kit 8098DB

    Wossner Suzuki RM125 2004-2007 53.96mm Piston Kit 8098DB

    WOSSNER

    $142.00
    The Wössner 8098DB piston kit is engineered to restore your RM125's peak performance and reliability. Whether you're rebuilding after a seizure or upgrading from OEM components, this German-precision piston delivers the durability and efficiency your...
    09104824
    SKU:
    09104824
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    BORE - OVERSIZE METRIC:
    +0.01 MM
    BORE SIZE METRIC:
    54.01 MM
    DISPLACEMENT:
    124 CC
    MODEL:
    STANDARD SERIES
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    ENGINE TYPE:
    2-STROKE
    PISTON SIZE METRIC:
    53.96 MM
    PRODUCT NAME:
    PISTON KIT
    TYPE:
    SINGLE RING
    BORE - OVERSIZE:
    +0,01 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    $142.00
    Qty in Cart: 0
    Quantity:
    Price:
    $142.00
    Subtotal:
  • Wossner Piston Kit Kawasaki KX85 2001-2025 48.45mm 8102DA

    Wossner Piston Kit Kawasaki KX85 2001-2025 48.45mm 8102DA

    WOSSNER

    $112.00
    Stock pistons can't handle the demands of high-performance riding—worn rings lose compression, increased friction robs you of power, and piston rock creates unwanted noise and wear. The Wossner 8102DA delivers the complete solution with OEM-spec fitment...
    09104826
    SKU:
    09104826
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    MODEL:
    STANDARD SERIES
    PISTON SIZE METRIC:
    48.45 MM
    PRODUCT NAME:
    PISTON KIT
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    DISPLACEMENT:
    84 CC
    PISTON MATERIAL:
    FORGED
    UNITS:
    KIT
    TYPE:
    SINGLE RING
    BORE SIZE METRIC:
    48.50 MM
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    $112.00
    Qty in Cart: 0
    Quantity:
    Price:
    $112.00
    Subtotal:
  • Wossner Piston Kit Kawasaki KX85 2001-2025 48.47mm 8102DC

    Wossner Piston Kit Kawasaki KX85 2001-2025 48.47mm 8102DC

    WOSSNER

    $112.00
    When you're pushing a KX85 to its limits, piston reliability directly impacts your power delivery and engine longevity. The Wossner 8102DC delivers the precision engineering and material science needed to handle aggressive 2-stroke demands without...
    09104828
    SKU:
    09104828
    Availability:
    Ships Same Business Day
    Weight:
    0.35 LBS
    BORE - OVERSIZE:
    +0,02 MM
    MODEL:
    STANDARD SERIES
    PRODUCT NAME:
    PISTON KIT
    DISPLACEMENT:
    84 CC
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PISTON SIZE METRIC:
    48.47 MM
    BORE - OVERSIZE METRIC:
    +0.02 MM
    BORE SIZE METRIC:
    48.52 MM
    ENGINE TYPE:
    2-STROKE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SINGLE RING
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $112.00
    Subtotal:
  • Wossner Suzuki RM85 2002-2023 47.97mm Piston Kit 8103DC

    Wossner Suzuki RM85 2002-2023 47.97mm Piston Kit 8103DC

    WOSSNER

    $112.00
    A worn or damaged piston directly kills engine performance, reliability, and throttle response on your RM85—especially critical for 2-stroke engines that depend on precision tolerances. The Wossner 8103DC delivers a complete, ready-to-install solution...
    09104831
    SKU:
    09104831
    Availability:
    Ships Same Business Day
    Weight:
    0.35 LBS
    BORE - OVERSIZE METRIC:
    +0.02 MM
    ENGINE TYPE:
    2-STROKE
    PRODUCT NAME:
    PISTON KIT
    TYPE:
    SINGLE RING
    BORE - OVERSIZE:
    +0,02 MM
    MODEL:
    STANDARD SERIES
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    BORE SIZE METRIC:
    48.02 MM
    DISPLACEMENT:
    84 CC
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PISTON SIZE METRIC:
    47.97 MM
    $112.00
    Qty in Cart: 0
    Quantity:
    Price:
    $112.00
    Subtotal:
  • Wossner 47.45mm Single Ring Piston Kit for Yamaha YZ85 2002-2025 8104DA

    Wossner 47.45mm Single Ring Piston Kit for Yamaha YZ85 2002-2025 8104DA

    WOSSNER

    $112.00
    A worn or damaged piston compromises combustion efficiency, increases blow-by, and accelerates engine wear—especially critical in 2-stroke applications where precision tolerances are unforgiving. The Wössner 8104DA restores your YZ85's performance with a...
    09104832
    SKU:
    09104832
    Availability:
    Ships Same Business Day
    Weight:
    0.35 LBS
    BORE SIZE METRIC:
    47.50 MM
    MODEL:
    STANDARD SERIES
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    ENGINE TYPE:
    2-STROKE
    PRODUCT NAME:
    PISTON KIT
    TYPE:
    SINGLE RING
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    DISPLACEMENT:
    84 CC
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PISTON SIZE METRIC:
    47.45 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $112.00
    Subtotal:
  • Wossner Yamaha YZ85 2002-2026 Piston Kit 8104DB

    Wossner Yamaha YZ85 2002-2026 Piston Kit 8104DB

    WOSSNER

    $112.00
    The Wossner YZ85 Piston Kit 8104DB is engineered to deliver the reliability and durability your 2-stroke engine demands, whether you're pushing hard on the track or putting in serious practice hours. This complete kit eliminates the guesswork of sourcing...
    09104833
    SKU:
    09104833
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    BORE - OVERSIZE METRIC:
    +0.01 MM
    BORE SIZE METRIC:
    47.51 MM
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    TYPE:
    SINGLE RING
    UNITS:
    KIT
    PRODUCT NAME:
    PISTON KIT
    MODEL:
    STANDARD SERIES
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE:
    +0,01 MM
    DISPLACEMENT:
    84 CC
    PISTON MATERIAL:
    FORGED
    PISTON SIZE METRIC:
    47.46 MM
    $112.00
    Qty in Cart: 0
    Quantity:
    Price:
    $112.00
    Subtotal:
  • Wossner Piston Kit KTM 85 SX 2003-2025 47.02mm 8147DC

    Wossner Piston Kit KTM 85 SX 2003-2025 47.02mm 8147DC

    WOSSNER

    $112.00
    The Wossner Piston Kit 8147DC is engineered for KTM 85 SX riders who demand reliability and consistent power delivery across the entire RPM band. Two-stroke pistons experience extreme thermal and mechanical stress, and a quality forged piston directly...
    09104849
    SKU:
    09104849
    Availability:
    Ships Same Business Day
    Weight:
    0.36 LBS
    ENGINE TYPE:
    2-STROKE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SINGLE RING
    UNITS:
    KIT
    BORE - OVERSIZE METRIC:
    +0.02 MM
    BORE SIZE METRIC:
    47.02 MM
    DISPLACEMENT:
    84 CC
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PISTON SIZE METRIC:
    46.97 MM
    BORE - OVERSIZE:
    +0,02 MM
    MODEL:
    STANDARD SERIES
    PRODUCT NAME:
    PISTON KIT
    $112.00
    Qty in Cart: 0
    Quantity:
    Price:
    $112.00
    Subtotal:
  • Wossner Dual Ring Piston Kit Honda CR250R 1978-1980 8154DA

    Wossner Dual Ring Piston Kit Honda CR250R 1978-1980 8154DA

    WOSSNER

    $152.00
    If you're rebuilding a CR250R top-end, you need a piston that can handle the demands of a high-revving 2-stroke without compromise. The Wossner 8154DA delivers the durability and precision fit that serious racers and mechanics expect, engineered to...
    09104851
    SKU:
    09104851
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    UNITS:
    KIT
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    69.94 MM
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    ATV
    DISPLACEMENT:
    248 CC
    MODEL:
    STANDARD SERIES
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    BORE SIZE METRIC:
    70.00 MM
    DISPLACEMENT:
    249 CC
    PISTON MATERIAL:
    FORGED
    TYPE:
    DUAL RING
    $152.00
    Qty in Cart: 0
    Quantity:
    Price:
    $152.00
    Subtotal:
  • Wossner 53.96mm Single Ring Piston Kit Yamaha YZ125 2005-2021 8160DB

    Wossner 53.96mm Single Ring Piston Kit Yamaha YZ125 2005-2021 8160DB

    WOSSNER

    $122.00
    When you're pushing a YZ125 to the limit, your piston has to survive extreme combustion pressures and temperatures—stock units often can't handle it. The Wossner 8160DB delivers the reliability and efficiency gains you need to keep your engine running...
    09104854
    SKU:
    09104854
    Availability:
    Ships Same Business Day
    Weight:
    0.31 LBS
    DISPLACEMENT:
    124 CC
    ENGINE TYPE:
    2-STROKE
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    BORE SIZE METRIC:
    54.01 MM
    TYPE:
    SINGLE RING
    BORE - OVERSIZE:
    +0,01 MM
    BORE - OVERSIZE METRIC:
    +0.01 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    MODEL:
    STANDARD SERIES
    PISTON SIZE METRIC:
    53.96 MM
    PRODUCT NAME:
    PISTON KIT
    $122.00
    Qty in Cart: 0
    Quantity:
    Price:
    $122.00
    Subtotal:
  • Wossner Piston Kit Kawasaki KX100 1995-2021 52.45mm 8254DA

    Wossner Piston Kit Kawasaki KX100 1995-2021 52.45mm 8254DA

    WOSSNER

    $112.00
    The Wossner 8254DA piston kit is engineered specifically for the Kawasaki KX100 (1995-2021) to deliver the reliability and precision required in competitive 2-stroke racing. A complete, bolt-on upgrade, this kit replaces worn or damaged components with...
    09104898
    SKU:
    09104898
    Availability:
    Ships Same Business Day
    Weight:
    0.41 LBS
    BORE - OVERSIZE:
    STANDARD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PISTON SIZE METRIC:
    52.45 MM
    BORE - OVERSIZE METRIC:
    STANDARD
    DISPLACEMENT:
    99 CC
    MODEL:
    STANDARD SERIES
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    BORE SIZE METRIC:
    52.50 MM
    ENGINE TYPE:
    2-STROKE
    PRODUCT NAME:
    PISTON KIT
    TYPE:
    SINGLE RING
    Qty in Cart: 0
    Quantity:
    Price:
    $112.00
    Subtotal:
  • Wossner Piston Kit KTM 50 SX 2009-2025 8262DA

    Wossner Piston Kit KTM 50 SX 2009-2025 8262DA

    WOSSNER

    $102.00
    A worn or damaged piston directly kills engine performance, compression, and reliability—especially in high-revving 2-stroke applications where tolerances are razor-thin. The Wossner 8262DA is engineered to restore full power delivery while actually...
    09104899
    SKU:
    09104899
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    ENGINE TYPE:
    2-STROKE
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    PISTON SIZE METRIC:
    39.46 MM
    TYPE:
    SINGLE RING
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    DISPLACEMENT:
    49 CC
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    BORE SIZE METRIC:
    39.50 MM
    MODEL:
    STANDARD SERIES
    PRODUCT NAME:
    PISTON KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $102.00
    Subtotal:
  • Wössner Piston Kit 39.48mm for KTM 50 SX 2009-2025 8262DC

    Wössner Piston Kit 39.48mm for KTM 50 SX 2009-2025 8262DC

    WOSSNER

    $102.00
    The Wössner Piston Kit 8262DC is engineered for 2-stroke racers who demand reliability under extreme combustion pressures. This complete bolt-on kit eliminates the guesswork of individual component matching, while the proprietary skirt coating reduces...
    09104901
    SKU:
    09104901
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    DISPLACEMENT:
    49 CC
    ENGINE TYPE:
    2-STROKE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SINGLE RING
    UNITS:
    KIT
    BORE - OVERSIZE:
    +0,02 MM
    BORE - OVERSIZE METRIC:
    +0.02 MM
    BORE SIZE METRIC:
    39.52 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    MODEL:
    STANDARD SERIES
    PISTON SIZE METRIC:
    39.48 MM
    PRODUCT NAME:
    PISTON KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $102.00
    Subtotal:
  • Wossner Piston Kit 94.95mm KTM 520 EXC 2000-2002 8547DA

    Wossner Piston Kit 94.95mm KTM 520 EXC 2000-2002 8547DA

    WOSSNER

    $214.00
    If you're running a KTM 520 EXC hard, factory pistons won't cut it. Wossner's 8547DA kit delivers the reliability and performance you need for sustained high-RPM operation, with precision engineering and proven durability that lets you push your bike...
    09104923
    SKU:
    09104923
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    BORE SIZE METRIC:
    95.00 MM
    PISTON SIZE METRIC:
    94.95 MM
    BORE - OVERSIZE METRIC:
    STANDARD
    COMPRESSION RATIO IMPERIAL:
    11.0:1
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    PRODUCT NAME:
    PISTON KIT
    BORE - OVERSIZE:
    STANDARD
    ENGINE TYPE:
    4-STROKE
    MODEL:
    PREMIUM SERIES
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    $214.00
    Qty in Cart: 0
    Quantity:
    Price:
    $214.00
    Subtotal:
  • Wossner Piston Kit KTM 525 EXC 2003-2007 8547DB

    Wossner Piston Kit KTM 525 EXC 2003-2007 8547DB

    WOSSNER

    $214.00
    The KTM 525 EXC demands a piston that can handle the demands of serious off-road riding—extreme heat, variable load conditions, and sustained high RPMs. The Wössner 8547DB delivers precisely that with a forged 4032 T6 aluminum construction that resists...
    09104924
    SKU:
    09104924
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    PRODUCT NAME:
    PISTON KIT
    BORE - OVERSIZE:
    +0,01 MM
    BORE - OVERSIZE METRIC:
    +0.01 MM
    COMPRESSION RATIO IMPERIAL:
    11.0:1
    PISTON SIZE METRIC:
    94.96 MM
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    BORE SIZE METRIC:
    95.01 MM
    ENGINE TYPE:
    4-STROKE
    MODEL:
    PREMIUM SERIES
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    Qty in Cart: 0
    Quantity:
    Price:
    $214.00
    Subtotal:
  • Wossner Piston Kit Yamaha YZ250F 2001-2004 77mm 12.5:1 Compression 8559DA

    Wossner Piston Kit Yamaha YZ250F 2001-2004 77mm 12.5:1 Compression 8559DA

    WOSSNER

    $184.00
    The Wossner 8559DA piston kit is engineered to restore or upgrade your YZ250F's top-end with precision-matched components that handle sustained high-RPM operation. Factory OEM pistons wear, lose compression, and compromise throttle response—this...
    09104925
    SKU:
    09104925
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    BORE SIZE METRIC:
    77.00 MM
    PRODUCT NAME:
    PISTON KIT
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    PISTON MATERIAL:
    FORGED
    UNITS:
    KIT
    MODEL:
    PREMIUM SERIES
    PISTON SIZE METRIC:
    76.96 MM
    COMPRESSION RATIO IMPERIAL:
    12.5:1
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    $184.00
    Qty in Cart: 0
    Quantity:
    Price:
    $184.00
    Subtotal:
  • Wossner Piston Kit 76.97mm Yamaha YZ250F 2001-2004 WR250F 2001-2013 8559DB

    Wossner Piston Kit 76.97mm Yamaha YZ250F 2001-2004 WR250F 2001-2013 8559DB

    WOSSNER

    $184.00
    If you're running a YZ250F or WR250F hard on the track or trail, the factory piston won't cut it when you're pushing peak RPMs and demanding maximum reliability. The Wossner 8559DB is German-engineered specifically for this engine, delivering the...
    09104926
    SKU:
    09104926
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    BORE - OVERSIZE:
    +0,01 MM
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    77.01 MM
    COMPRESSION RATIO IMPERIAL:
    12.5:1
    MODEL:
    PREMIUM SERIES
    BORE - OVERSIZE METRIC:
    +0.01 MM
    PISTON MATERIAL:
    FORGED
    PISTON SIZE METRIC:
    76.97 MM
    UNITS:
    KIT
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    Qty in Cart: 0
    Quantity:
    Price:
    $184.00
    Subtotal:
  • Wossner Piston Kit KTM 450 EXC 2003-2009 11.1:1 CR 8581DB

    Wossner Piston Kit KTM 450 EXC 2003-2009 11.1:1 CR 8581DB

    WOSSNER

    $204.00
    The Wossner Piston Kit 8581DB is engineered to restore or exceed OEM performance in your KTM 450 EXC while delivering the durability demanded by serious trail and off-road riders. Built from 4032 T6 forged aluminum and featuring a permanent skirt...
    09104933
    SKU:
    09104933
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    BORE - OVERSIZE:
    +0,01 MM
    COMPRESSION RATIO IMPERIAL:
    11.1:1
    MODEL:
    STANDARD SERIES
    PISTON SIZE METRIC:
    88.97 MM
    PRODUCT NAME:
    PISTON KIT
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    RIDING STYLE:
    STREET
    BORE SIZE METRIC:
    89.01 MM
    BORE - OVERSIZE METRIC:
    +0.01 MM
    ENGINE TYPE:
    4-STROKE
    RIDING STYLE:
    ATV
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $204.00
    Qty in Cart: 0
    Quantity:
    Price:
    $204.00
    Subtotal:
  • Total: items /

Adding your products to cart

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

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