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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
  • VERTEX Piston Kit 23265A

    VERTEX Piston Kit 23265A

    VERTEX

    $170.95
    A quality piston kit is the foundation of a reliable, high-RPM engine. The VERTEX Piston Kit 23265A delivers the durability and precision you need to sustain peak performance without compromising longevity. Purpose-built with advanced metallurgy and...
    09102554
    SKU:
    09102554
    Availability:
    Ships Same Business Day
    Weight:
    0.39 LBS
    $170.95
    Qty in Cart: 0
    Quantity:
    Price:
    $170.95
    Subtotal:
  • VERTEX Piston Kit 22481AB

    VERTEX Piston Kit 22481AB

    VERTEX

    $98.95
    A piston kit lives at the heart of your engine's power delivery—and choosing the right one determines whether you're getting reliable, consistent performance or leaving power on the table. The VERTEX Piston Kit 22481AB delivers precision-engineered...
    09102234
    SKU:
    09102234
    Availability:
    Ships Same Business Day
    Weight:
    0.24 LBS
    COMPRESSION RATIO IMPERIAL:
    STANDARD
    RIDING STYLE:
    OFF-ROAD
    DISPLACEMENT:
    65 CC
    PISTON DIAMETER METRIC:
    44.96 MM
    STYLE:
    CAST REPLICA
    CYLINDER DIAMETER METRIC:
    45.00 MM
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    CAST
    PRODUCT NAME:
    PISTON KIT
    SKIRT COATING:
    MOLYBDENUM DISULPHITE
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $98.95
    Subtotal:
  • Wiseco Piston Kit Honda CRF450R 2017 4979M09600

    Wiseco Piston Kit Honda CRF450R 2017 4979M09600

    WISECO

    $269.95
    When you're pushing your CRF450R to its limits, stock internals won't keep up. The Wiseco 4979M09600 replaces worn or damaged pistons with a precision-engineered unit that restores—or exceeds—OEM performance while delivering the reliability you need for...
    09102934
    SKU:
    09102934
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    COMPRESSION RATIO IMPERIAL:
    13.0:1
    DISPLACEMENT:
    449 CC
    PISTON MATERIAL:
    FORGED
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    BORE SIZE METRIC:
    96.00 MM
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    62.10 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $269.95
    Subtotal:
  • Wiseco Piston Kit Kawasaki KX250F 2015-2016 77.00mm 13.8:1 Compression 40124M07700

    Wiseco Piston Kit Kawasaki KX250F 2015-2016 77.00mm 13.8:1 Compression 40124M07700

    WISECO

    $224.95
    When your KX250F's original piston shows wear, combustion efficiency drops and power delivery suffers—costing you critical seconds on the track or trail. The Wiseco 40124M07700 restores that lost performance with precision engineering and a higher 13.8:1...
    09103915
    SKU:
    09103915
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    STROKE LENGTH METRIC:
    53.60 MM
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    COMPRESSION RATIO IMPERIAL:
    13.8:1
    DISPLACEMENT:
    250 CC
    ENGINE TYPE:
    4-STROKE
    BORE SIZE METRIC:
    77.00 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $224.95
    Subtotal:
  • Wiseco 95mm 12.5:1 Piston Kit for 2012-2016 KTM 500 EXC 40131M09500

    Wiseco 95mm 12.5:1 Piston Kit for 2012-2016 KTM 500 EXC 40131M09500

    WISECO

    $284.95
    If you're running a KTM 500 EXC and want to extract meaningful gains in combustion efficiency and throttle response, a high-compression piston upgrade is one of the most direct paths forward. The Wiseco 40131M09500 delivers a 12.5:1 compression ratio in...
    09103919
    SKU:
    09103919
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    BORE SIZE METRIC:
    95.00 MM
    STROKE LENGTH METRIC:
    72.00 MM
    PISTON MATERIAL:
    FORGED
    DISPLACEMENT:
    510 CC
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    COMPRESSION RATIO IMPERIAL:
    12.5:1
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $284.95
    Subtotal:
  • Wiseco Piston Kit 95mm 11.8:1 Compression for KTM 450 XC-W 2012–2016 40091M09500

    Wiseco Piston Kit 95mm 11.8:1 Compression for KTM 450 XC-W 2012–2016 40091M09500

    WISECO

    $254.95
    If you're running a KTM 450 XC-W and want measurable gains in throttle response and combustion efficiency, an 11.8:1 compression piston kit is the foundation for that upgrade. Wiseco's CNC-machined design ensures precise tolerances and reliable power...
    09103927
    SKU:
    09103927
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    COMPRESSION RATIO IMPERIAL:
    11.8:1
    DISPLACEMENT:
    510 CC
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    ENGINE TYPE:
    4-STROKE
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    63.40 MM
    BORE SIZE METRIC:
    88.00 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    Qty in Cart: 0
    Quantity:
    Price:
    $254.95
    Subtotal:
  • Wiseco Piston Kit KTM 250 EXC 2000-2005 66.40mm 857M06640

    Wiseco Piston Kit KTM 250 EXC 2000-2005 66.40mm 857M06640

    WISECO

    $210.95
    Stock pistons in your 250 EXC won't cut it if you're pushing for more power and reliability. The Wiseco Pro-Lite piston kit delivers the precision engineering and durable materials needed to maximize compression, reduce friction, and handle aggressive...
    09103962
    SKU:
    09103962
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    ENGINE TYPE:
    2-STROKE
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    BORE SIZE METRIC:
    66.40 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    DISPLACEMENT:
    249 CC
    STROKE LENGTH METRIC:
    72.00 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $210.95
    Subtotal:
  • Wiseco Piston Kit 54mm 9.4:1 Compression Honda CRF100F 2004-2013 PK1230

    Wiseco Piston Kit 54mm 9.4:1 Compression Honda CRF100F 2004-2013 PK1230

    WISECO

    $224.95
    A worn or damaged piston directly impacts your CRF100's throttle response, fuel efficiency, and overall reliability. The Wiseco PK1230 restores compression integrity and delivers the responsive power your machine deserves, whether you're trail riding or...
    09030180
    SKU:
    09030180
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    BORE - OVERSIZE:
    +1,00 MM
    BORE - OVERSIZE METRIC:
    +1.00 MM
    MODEL:
    FORGED SERIES
    SKIRT COATING:
    NON-COATED
    DISPLACEMENT:
    99.2 CC
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    BORE SIZE METRIC:
    54.00 MM
    COMPRESSION RATIO IMPERIAL:
    9.4:1
    PRODUCT NAME:
    REBUILD KIT
    TYPE:
    TOP END
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    53.97 MM
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    45.00 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $224.95
    Subtotal:
  • Wiseco Piston Kit with Gaskets Yamaha YZ85 2002-2022 PK1205

    Wiseco Piston Kit with Gaskets Yamaha YZ85 2002-2022 PK1205

    WISECO

    $179.95
    The Wiseco PK1205 piston kit delivers the compression and durability your YZ85 needs to handle consistent high-RPM riding without premature wear. This complete top-end rebuild solution eliminates guesswork with factory-matched components, ensuring your...
    09030194
    SKU:
    09030194
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    DISPLACEMENT:
    85 CC
    ENGINE TYPE:
    2-STROKE
    PISTON DIAMETER METRIC:
    49.45 MM
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    PISTON SIZE METRIC:
    +2.00 MM
    BORE - OVERSIZE METRIC:
    +2.00 MM
    MODEL:
    PRO-LITE
    PRODUCT NAME:
    REBUILD KIT
    TYPE:
    TOP END
    BORE - OVERSIZE:
    +2,00 MM
    BORE SIZE METRIC:
    49.50 MM
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    47.80 MM
    UNITS:
    KIT
    SKIRT COATING:
    NON-COATED
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • Wiseco Piston Kit 53.5mm Bore Honda CRF100F 2004-2008 PK1229

    Wiseco Piston Kit 53.5mm Bore Honda CRF100F 2004-2008 PK1229

    WISECO

    $234.95
    If your Honda CRF100F is showing signs of wear or you're rebuilding after high-mileage riding, the Wiseco PK1229 brings you back to factory-spec performance with forged aluminum construction that handles both casual trail work and competitive conditions...
    09030199
    SKU:
    09030199
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    DISPLACEMENT:
    99.2 CC
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    BORE SIZE METRIC:
    53.50 MM
    COMPRESSION RATIO IMPERIAL:
    9.4:1
    MODEL:
    FORGED SERIES
    PISTON DIAMETER METRIC:
    53.47 MM
    PRODUCT NAME:
    REBUILD KIT
    STROKE LENGTH METRIC:
    45.00 MM
    TYPE:
    TOP END
    BORE - OVERSIZE:
    +0,50 MM
    BORE - OVERSIZE METRIC:
    +0.50 MM
    RIDING STYLE:
    OFF-ROAD
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $234.95
    Subtotal:
  • Wiseco Honda CR250R 1986-1989 Piston Kit with Gaskets PK1243

    Wiseco Honda CR250R 1986-1989 Piston Kit with Gaskets PK1243

    WISECO

    $291.95
    A worn top end doesn't just cost you power—it compromises reliability when you need it most. The Wiseco PK1243 restores your CR250R to factory precision with CNC-machined pistons and a complete gasket set, giving you the confidence to push hard on track...
    09030273
    SKU:
    09030273
    Availability:
    Ships Same Business Day
    Weight:
    1.55 LBS
    BORE SIZE METRIC:
    66.40 MM
    MODEL:
    PRO-LITE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    ENGINE TYPE:
    2-STROKE
    PISTON DIAMETER METRIC:
    66.36 MM
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    DISPLACEMENT:
    249 CC
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    72.00 MM
    PRODUCT NAME:
    REBUILD KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $291.95
    Subtotal:
  • Wiseco Suzuki RM125 1991-1996 Piston Kit with Gaskets PK1318

    Wiseco Suzuki RM125 1991-1996 Piston Kit with Gaskets PK1318

    WISECO

    $212.95
    The Wiseco PK1318 piston kit is engineered specifically for the 1991-1996 Suzuki RM125, delivering the compression and ring seal needed for consistent top-end performance. Whether you're rebuilding after race wear or refreshing an aging engine, this...
    09030279
    SKU:
    09030279
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    PISTON DIAMETER METRIC:
    53.96 MM
    PRODUCT NAME:
    REBUILD KIT
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    54.00 MM
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    ENGINE TYPE:
    2-STROKE
    SKIRT COATING:
    NON-COATED
    BORE SIZE METRIC:
    54.00 MM
    DISPLACEMENT:
    123 CC
    MODEL:
    PRO-LITE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $212.95
    Subtotal:
  • Wiseco Yamaha PW50 1985-2025 Piston Kit with Gaskets PK1159

    Wiseco Yamaha PW50 1985-2025 Piston Kit with Gaskets PK1159

    WISECO

    $171.95
    The Wiseco PK1159 is a complete top-end rebuild solution for your Yamaha PW50, delivering the precision and durability needed for consistent performance across decades of model years. Whether you're restoring a vintage unit or maintaining a current...
    09030281
    SKU:
    09030281
    Availability:
    Ships Same Business Day
    Weight:
    0.93 LBS
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    REBUILD KIT
    BORE - OVERSIZE:
    +0,50 MM
    PISTON MATERIAL:
    ALUMINUM
    UNITS:
    EACH
    BORE SIZE METRIC:
    40.50 MM
    COOLING SYSTEM:
    LIQUID COOLED
    BORE - OVERSIZE METRIC:
    +0.50 MM
    DISPLACEMENT:
    49 CC
    MODEL:
    RACER'S CHOICE
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    39.20 MM
    TYPE:
    TOP END
    Qty in Cart: 0
    Quantity:
    Price:
    $171.95
    Subtotal:
  • Wiseco Piston Kit with Gaskets for Honda CR125R 2000 PK1257

    Wiseco Piston Kit with Gaskets for Honda CR125R 2000 PK1257

    WISECO

    $238.95
    A worn or damaged piston directly impacts combustion efficiency, throttle response, and overall engine reliability—especially critical on a high-revving 2-stroke like the CR125R. The Wiseco PK1257 is engineered to restore and exceed OEM performance with...
    09030284
    SKU:
    09030284
    Availability:
    Ships Same Business Day
    Weight:
    0.65 LBS
    PRODUCT NAME:
    REBUILD KIT
    STROKE LENGTH METRIC:
    54.50 MM
    DISPLACEMENT:
    125 CC
    MODEL:
    PRO-LITE
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    PISTON DIAMETER METRIC:
    53.95 MM
    RIDING STYLE:
    OFF-ROAD
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    BORE SIZE METRIC:
    54.00 MM
    ENGINE TYPE:
    2-STROKE
    TYPE:
    TOP END
    Qty in Cart: 0
    Quantity:
    Price:
    $238.95
    Subtotal:
  • Wiseco Piston Kit with Gaskets for Kawasaki KX80 1998-2000 PK1150

    Wiseco Piston Kit with Gaskets for Kawasaki KX80 1998-2000 PK1150

    WISECO

    $192.95
    The Wiseco PK1150 piston kit is engineered to restore and exceed your KX80's original performance specifications, delivering measurable gains in power delivery and throttle response. If you're running stock internals on a 1998-2000 Kawasaki KX80, this...
    09030289
    SKU:
    09030289
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    MODEL:
    PRO-LITE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    DISPLACEMENT:
    82 CC
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    45.80 MM
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    ENGINE TYPE:
    2-STROKE
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    BORE SIZE METRIC:
    48.00 MM
    PISTON DIAMETER METRIC:
    47.95 MM
    PRODUCT NAME:
    REBUILD KIT
    $192.95
    Qty in Cart: 0
    Quantity:
    Price:
    $192.95
    Subtotal:
  • Wiseco Piston Kit 54.50mm Yamaha YZ125 1998-2000 PK1174

    Wiseco Piston Kit 54.50mm Yamaha YZ125 1998-2000 PK1174

    WISECO

    $209.95
    The Wiseco PK1174 piston kit restores lost performance and reliability to your YZ125's powerplant, delivering measurable gains in throttle response and mid-range punch. Whether you're rebuilding after wear or upgrading for competition, this kit includes...
    09030291
    SKU:
    09030291
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    BORE - OVERSIZE:
    +0,50 MM
    BORE - OVERSIZE METRIC:
    +0.50 MM
    BORE SIZE METRIC:
    54.50 MM
    MODEL:
    PRO-LITE
    PISTON DIAMETER METRIC:
    54.45 MM
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    UNITS:
    KIT
    DISPLACEMENT:
    124 CC
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    54.50 MM
    ENGINE TYPE:
    2-STROKE
    SKIRT COATING:
    NON-COATED
    PRODUCT NAME:
    REBUILD KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $209.95
    Subtotal:
  • Wiseco Piston Honda CR250R 1978-1980 1.5mm 431M07150

    Wiseco Piston Honda CR250R 1978-1980 1.5mm 431M07150

    WISECO

    $232.95
    Your CR250R's performance is only as strong as its internal components—and a worn or undersized piston directly limits throttle response, combustion efficiency, and reliability. The Wiseco 431M07150 is precision-forged to exact tolerances, delivering the...
    431M07150
    SKU:
    431M07150
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    BORE SIZE METRIC:
    71.50 MM
    DISPLACEMENT:
    248 CC
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE METRIC:
    +1.50 MM
    ENGINE TYPE:
    2-STROKE
    PISTON DIAMETER METRIC:
    71.45 MM
    PRODUCT NAME:
    PISTON KIT
    STROKE LENGTH METRIC:
    64.40 MM
    BORE - OVERSIZE:
    +1,50 MM
    MODEL:
    FORGED SERIES
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $232.95
    Subtotal:
  • Wiseco Piston Kit 68.50mm Oversize Yamaha IT 250 1983 515M06850

    Wiseco Piston Kit 68.50mm Oversize Yamaha IT 250 1983 515M06850

    WISECO

    $204.95
    Stock pistons on your 1983 Yamaha IT250 weren't designed for sustained high-RPM operation or aggressive trail riding—they'll eventually fail under demanding conditions. The Wiseco 515M06850 is a purpose-built replacement that delivers the durability and...
    515M06850
    SKU:
    515M06850
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    BORE SIZE METRIC:
    68.50 MM
    DISPLACEMENT:
    246,8 CC
    BORE - OVERSIZE METRIC:
    +0.50 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH:
    68,00 MM
    UNITS:
    EACH
    BORE - OVERSIZE:
    +0,50 MM
    PRODUCT NAME:
    PISTON
    PISTON MATERIAL:
    FORGED
    STROKE LENGTH METRIC:
    68.00 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $204.95
    Subtotal:
  • Wiseco Piston Kit 96mm 12.5:1 Kawasaki KX450F 2009-2012 PK1841

    Wiseco Piston Kit 96mm 12.5:1 Kawasaki KX450F 2009-2012 PK1841

    WISECO

    $309.95
    If you're running a KX450F and want measurable gains in top-end power and combustion efficiency, a quality piston upgrade is one of the most direct paths to real performance. The Wiseco PK1841 delivers the compression ratio and material science needed to...
    09030936
    SKU:
    09030936
    Availability:
    Ships Same Business Day
    Weight:
    1.55 LBS
    BORE SIZE METRIC:
    96.00 MM
    ENGINE TYPE:
    4-STROKE
    MODEL:
    FORGED SERIES
    TYPE:
    TOP END
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    DISPLACEMENT:
    449 CC
    PISTON DIAMETER METRIC:
    95.95 MM
    PRODUCT NAME:
    REBUILD KIT
    SKIRT COATING:
    ARMORGLIDE®
    PISTON MATERIAL:
    2618 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    COMPRESSION RATIO IMPERIAL:
    12.5:1
    STROKE LENGTH METRIC:
    62.10 MM
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $309.95
    Subtotal:
  • Wiseco Honda CRF250R 2010-2013 Piston Kit with Gaskets PK1874

    Wiseco Honda CRF250R 2010-2013 Piston Kit with Gaskets PK1874

    WISECO

    $274.95
    If you're running a CRF250R in competitive or high-demand riding conditions, a quality piston kit is essential to maintaining power output and engine reliability. The Wiseco PK1874 delivers the precision engineering and thermal stability needed to keep...
    09030940
    SKU:
    09030940
    Availability:
    Ships Same Business Day
    Weight:
    1.05 LBS
    DISPLACEMENT:
    249 CC
    PISTON DIAMETER METRIC:
    76.75 MM
    PRODUCT NAME:
    REBUILD KIT
    BORE SIZE METRIC:
    76.80 MM
    MODEL:
    FORGED SERIES
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    RIDING STYLE:
    OFF-ROAD
    SKIRT COATING:
    ARMORGLIDE®
    STROKE LENGTH METRIC:
    53.80 MM
    UNITS:
    KIT
    COMPRESSION RATIO IMPERIAL:
    13.2:1
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    2618 ALUMINUM ALLOY
    TYPE:
    TOP END
    Qty in Cart: 0
    Quantity:
    Price:
    $274.95
    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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