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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
  • Wiseco Piston Kit 68.50mm for Honda CR250R 1997-2001 PK1172

    Wiseco Piston Kit 68.50mm for Honda CR250R 1997-2001 PK1172

    WISECO

    $297.95
    When your CR250R's top end reaches the end of its service life, a quality rebuild kit isn't optional—it's essential to maintaining the power and reliability your bike demands. The Wiseco PK1172 delivers factory-spec bore sizing and forged piston...
    09030523
    SKU:
    09030523
    Availability:
    Ships Same Business Day
    Weight:
    1.25 LBS
    BORE - OVERSIZE METRIC:
    +2.10 MM
    ENGINE TYPE:
    2-STROKE
    MODEL:
    PRO-LITE
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    UNITS:
    KIT
    BORE SIZE METRIC:
    68.50 MM
    PISTON DIAMETER METRIC:
    68.46 MM
    PRODUCT NAME:
    REBUILD KIT
    STROKE LENGTH METRIC:
    72.00 MM
    BORE - OVERSIZE:
    +2,10 MM
    SKIRT COATING:
    NON-COATED
    DISPLACEMENT:
    249 CC
    Qty in Cart: 0
    Quantity:
    Price:
    $297.95
    Subtotal:
  • Wiseco Piston Kit Standard 77mm 14.5:1 Compression Kawasaki KX250F 2017-2019 4920M07700

    Wiseco Piston Kit Standard 77mm 14.5:1 Compression Kawasaki KX250F 2017-2019 4920M07700

    WISECO

    $224.95
    A piston kit is the heart of your engine's combustion chamber—wear or damage here directly kills power output and reliability. The Wiseco 4920M07700 delivers OEM-quality precision with performance-oriented engineering, giving you the compression ratio...
    09100844
    SKU:
    09100844
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    BORE SIZE METRIC:
    77.00 MM
    DISPLACEMENT:
    250 CC
    PISTON MATERIAL:
    FORGED
    STROKE LENGTH METRIC:
    53.60 MM
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    COMPRESSION RATIO IMPERIAL:
    13.5:1
    PRODUCT NAME:
    PISTON
    SKIRT COATING:
    ARMORGLIDE®
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $224.95
    Subtotal:
  • Wiseco Piston Kit 76mm 12.8:1 Compression for 2006-2012 KTM 250 SX-F 4981M07600

    Wiseco Piston Kit 76mm 12.8:1 Compression for 2006-2012 KTM 250 SX-F 4981M07600

    WISECO

    $266.95
    Wiseco's 4981M07600 piston kit delivers the compression ratio and bore precision your KTM 250 SX-F demands for serious trail and motocross performance. The aerospace-grade forged aluminum construction with ArmorGlide coating ensures your engine handles...
    09100846
    SKU:
    09100846
    Availability:
    Ships Same Business Day
    Weight:
    0.57 LBS
    BORE SIZE METRIC:
    76.00 MM
    RIDING STYLE:
    STREET
    DISPLACEMENT:
    249,5 CC
    SKIRT COATING:
    MOLY COATED
    BORE - OVERSIZE METRIC:
    STANDARD
    COMPRESSION RATIO IMPERIAL:
    12.8:1
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE:
    STANDARD
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $266.95
    Subtotal:
  • Wiseco Honda CR85R 2003-2007 Piston Kit with Gaskets 48.50mm PK1216

    Wiseco Honda CR85R 2003-2007 Piston Kit with Gaskets 48.50mm PK1216

    WISECO

    $169.95
    When your CR85R's top-end starts losing compression and throttle response, a quality rebuild kit is the difference between a seized engine and years of reliable performance. The Wiseco PK1216 gives you factory-spec pistons, rings, and gaskets in one...
    09030545
    SKU:
    09030545
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    BORE SIZE METRIC:
    48.50 MM
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    ENGINE TYPE:
    2-STROKE
    MODEL:
    PRO-LITE
    PRODUCT NAME:
    REBUILD KIT
    BORE - OVERSIZE METRIC:
    +1.00 MM
    SKIRT COATING:
    NON-COATED
    STROKE LENGTH METRIC:
    47.80 MM
    UNITS:
    KIT
    BORE - OVERSIZE:
    +1,00 MM
    DISPLACEMENT:
    84.7 CC
    PISTON DIAMETER METRIC:
    48.45 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $169.95
    Subtotal:
  • Wiseco Piston Kit 78mm 13.5:1 Honda CRF250R 2004-2007 CRF250X 2004-2017 PK1240

    Wiseco Piston Kit 78mm 13.5:1 Honda CRF250R 2004-2007 CRF250X 2004-2017 PK1240

    WISECO

    $362.95
    If you're running a CRF250R or CRF250X and want measurable gains in power output and engine durability, a quality piston kit is non-negotiable. The Wiseco PK1240 delivers the compression ratio and material quality needed to extract real performance from...
    09030551
    SKU:
    09030551
    Availability:
    Ships Same Business Day
    Weight:
    1.05 LBS
    DISPLACEMENT:
    249 CC
    BORE SIZE METRIC:
    78.00 MM
    PRODUCT NAME:
    REBUILD KIT
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    COMPRESSION RATIO IMPERIAL:
    13.5:1
    MODEL:
    FORGED SERIES
    SKIRT COATING:
    ARMORGLIDE®
    STROKE LENGTH METRIC:
    52.20 MM
    UNITS:
    KIT
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    77.95 MM
    PISTON MATERIAL:
    2618 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    $362.95
    Qty in Cart: 0
    Quantity:
    Price:
    $362.95
    Subtotal:
  • Wiseco Piston Kit Honda CR125R 2004-2007 54mm 841M05400

    Wiseco Piston Kit Honda CR125R 2004-2007 54mm 841M05400

    WISECO

    $174.95
    A worn or damaged piston directly compromises your CR125R's combustion efficiency, throttle response, and overall reliability. The Wiseco 841M05400 GP Series Piston Kit restores these critical functions with precision-engineered components and...
    09100731
    SKU:
    09100731
    Availability:
    Ships Same Business Day
    Weight:
    0.41 LBS
    BORE - OVERSIZE:
    STANDARD
    BORE SIZE METRIC:
    54.00 MM
    UNITS:
    EACH
    DISPLACEMENT:
    125 CC
    ENGINE TYPE:
    2-STROKE
    MODEL:
    GP STYLE
    BORE - OVERSIZE METRIC:
    STANDARD
    PISTON MATERIAL:
    ALUMINUM
    PISTON MATERIAL:
    FORGED
    RIDING STYLE:
    OFF-ROAD
    PRODUCT NAME:
    PISTON KIT
    STROKE LENGTH METRIC:
    54.50 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $174.95
    Subtotal:
  • Wiseco Piston Kit with Gaskets for Kawasaki KX450F 2006-2008 PK1403

    Wiseco Piston Kit with Gaskets for Kawasaki KX450F 2006-2008 PK1403

    WISECO

    $328.95
    When your KX450F's top end starts showing wear, a quality piston kit is the foundation of reliable power restoration. Wiseco's PK1403 delivers the precision engineering and durable materials you need to keep your 4-stroke competitive on the track or...
    09030575
    SKU:
    09030575
    Availability:
    Ships Same Business Day
    Weight:
    1.70 LBS
    BORE - OVERSIZE METRIC:
    STANDARD
    BORE SIZE METRIC:
    96.00 MM
    DISPLACEMENT:
    449 CC
    PISTON DIAMETER METRIC:
    STANDARD
    SKIRT COATING:
    ARMORGLIDE®
    BORE - OVERSIZE:
    STANDARD
    COMPRESSION RATIO IMPERIAL:
    12.0:1
    ENGINE TYPE:
    4-STROKE
    MODEL:
    FORGED SERIES
    PISTON MATERIAL:
    2618 ALUMINUM ALLOY
    PRODUCT NAME:
    REBUILD KIT
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    62.10 MM
    TYPE:
    TOP END
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $328.95
    Subtotal:
  • Wiseco Piston Kit 96mm 13:1 Kawasaki KX450F 2006-2008 PK1405

    Wiseco Piston Kit 96mm 13:1 Kawasaki KX450F 2006-2008 PK1405

    WISECO

    $349.95
    The Wiseco PK1405 piston kit delivers measurable performance gains for your KX450F through a 13:1 compression ratio that increases power output without sacrificing fuel efficiency. Whether you're pushing hard on the track or maximizing your bike's...
    09030576
    SKU:
    09030576
    Availability:
    Ships Same Business Day
    Weight:
    1.65 LBS
    MODEL:
    FORGED SERIES
    STROKE LENGTH METRIC:
    62.10 MM
    BORE SIZE METRIC:
    96.00 MM
    ENGINE TYPE:
    4-STROKE
    TYPE:
    TOP END
    COMPRESSION RATIO IMPERIAL:
    13.0:1
    DISPLACEMENT:
    449 CC
    PISTON DIAMETER METRIC:
    STANDARD
    PISTON MATERIAL:
    2618 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    SKIRT COATING:
    ARMORGLIDE®
    UNITS:
    KIT
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    PRODUCT NAME:
    REBUILD KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $349.95
    Subtotal:
  • Wiseco Piston Kit Standard Kawasaki KX85 2001-2013 862M04850

    Wiseco Piston Kit Standard Kawasaki KX85 2001-2013 862M04850

    WISECO

    $134.95
    The Wiseco 862M04850 Pro-Lite Piston Kit delivers the precision and durability your KX85 needs to handle consistent high-RPM demands. If you're rebuilding after a top-end refresh or pushing your 2-stroke harder than stock internals allow, this piston kit...
    09100762
    SKU:
    09100762
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON
    BORE SIZE METRIC:
    48.50 MM
    PISTON MATERIAL:
    FORGED
    RIDING STYLE:
    OFF-ROAD
    DISPLACEMENT:
    84,9 CC
    ENGINE TYPE:
    2-STROKE
    UNITS:
    EACH
    STROKE LENGTH METRIC:
    45.80 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $134.95
    Subtotal:
  • Wiseco Piston Kit for Yamaha YZ125 2005-2021 846M05600

    Wiseco Piston Kit for Yamaha YZ125 2005-2021 846M05600

    WISECO

    $184.95
    A worn or stock piston compromises your YZ125's power delivery and reliability when you need it most. The Wiseco 846M05600 Pro-Lite Kit delivers the precision and durability that serious 2-stroke racers depend on, combining CNC-machined tolerances with...
    09100800
    SKU:
    09100800
    Availability:
    Ships Same Business Day
    Weight:
    0.47 LBS
    BORE SIZE METRIC:
    56.00 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    BORE - OVERSIZE METRIC:
    +2.00 MM
    ENGINE TYPE:
    2-STROKE
    MODEL:
    GP STYLE
    BORE - OVERSIZE:
    +2,00 MM
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    RIDING STYLE:
    OFF-ROAD
    DISPLACEMENT:
    134 CC
    STROKE LENGTH METRIC:
    54.50 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $184.95
    Subtotal:
  • Wiseco Piston Kit Suzuki RM80 1991-2001 645M04900

    Wiseco Piston Kit Suzuki RM80 1991-2001 645M04900

    WISECO

    $144.95
    When a 2-stroke piston fails, your ride is over. The Wiseco 645M04900 Pro-Lite delivers the durability and precision engineering that keeps your RM80 running strong through seasons of hard riding. This complete kit eliminates guesswork with all necessary...
    09101222
    SKU:
    09101222
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    BORE - OVERSIZE:
    +1,50 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    46.80 MM
    UNITS:
    EACH
    BORE SIZE METRIC:
    49.00 MM
    DISPLACEMENT:
    82 CC
    ENGINE TYPE:
    2-STROKE
    MODEL:
    PRO-LITE
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE METRIC:
    +1.50 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $144.95
    Subtotal:
  • Wiseco Piston Kit Yamaha YZ125 1994-1996 647M05600

    Wiseco Piston Kit Yamaha YZ125 1994-1996 647M05600

    WISECO

    $179.95
    A worn or damaged piston directly compromises your YZ125's power delivery, throttle response, and engine reliability—especially critical on 2-stroke engines where piston quality directly impacts performance. The Wiseco 647M05600 Pro-Lite Kit delivers the...
    09101224
    SKU:
    09101224
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    BORE - OVERSIZE METRIC:
    +2.00 MM
    DISPLACEMENT:
    124 CC
    ENGINE TYPE:
    2-STROKE
    MODEL:
    PRO-LITE
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    BORE - OVERSIZE:
    +2,00 MM
    BORE SIZE METRIC:
    56.00 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON
    PISTON MATERIAL:
    FORGED
    STROKE LENGTH METRIC:
    54.50 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • Wiseco 47mm Piston Kit for KTM 65 SX 1999-2008 PK1515

    Wiseco 47mm Piston Kit for KTM 65 SX 1999-2008 PK1515

    WISECO

    $189.95
    When your KTM 65 SX's top end is worn, you're losing compression, power, and reliability. The Wiseco PK1515 restores—and exceeds—OEM performance with aerospace-grade materials engineered for 2-stroke demands. This complete kit gives you everything needed...
    09030702
    SKU:
    09030702
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    40.00 MM
    UNITS:
    KIT
    DISPLACEMENT:
    63.58 CC
    PISTON DIAMETER METRIC:
    46.95 MM
    SKIRT COATING:
    NON-COATED
    BORE - OVERSIZE METRIC:
    +2.00 MM
    BORE SIZE METRIC:
    47.00 MM
    ENGINE TYPE:
    2-STROKE
    MODEL:
    PRO-LITE
    TYPE:
    TOP END
    BORE - OVERSIZE:
    +2,00 MM
    PISTON SIZE METRIC:
    +2.00 MM
    PRODUCT NAME:
    REBUILD KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • Wiseco Suzuki RM80 1991-2001 49.5mm Piston Kit with Gaskets PK1528

    Wiseco Suzuki RM80 1991-2001 49.5mm Piston Kit with Gaskets PK1528

    WISECO

    $189.95
    If you're running a 1991-2001 Suzuki RM80 and want to restore lost compression or upgrade to fresh top-end internals, the Wiseco PK1528 is the standard choice for serious riders. This complete piston kit eliminates the guesswork of sourcing individual...
    09030710
    SKU:
    09030710
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    PISTON SIZE METRIC:
    +2.00 MM
    PRODUCT NAME:
    REBUILD KIT
    BORE - OVERSIZE:
    +2,00 MM
    ENGINE TYPE:
    2-STROKE
    STROKE LENGTH METRIC:
    46.80 MM
    TYPE:
    TOP END
    BORE - OVERSIZE METRIC:
    +2.00 MM
    BORE SIZE METRIC:
    49.50 MM
    DISPLACEMENT:
    82 CC
    MODEL:
    PRO-LITE
    PISTON DIAMETER METRIC:
    49.45 MM
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • Wiseco Piston Kit Suzuki RM250 2003-2008 823M06750

    Wiseco Piston Kit Suzuki RM250 2003-2008 823M06750

    WISECO

    $118.95
    A worn or damaged piston directly limits your RM250's power output and throttle response. Wiseco's 823M06750 kit restores—or exceeds—OEM performance with precision-engineered internals and a complete ring/pin assembly, getting you back to competitive lap...
    09101251
    SKU:
    09101251
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    BORE - OVERSIZE METRIC:
    +1.10 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    BORE SIZE METRIC:
    67.50 MM
    DISPLACEMENT:
    249 CC
    ENGINE TYPE:
    2-STROKE
    BORE - OVERSIZE:
    +1,10 MM
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    72.00 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $118.95
    Subtotal:
  • Wiseco Piston Kit 45.00mm 2.00mm Oversize Kawasaki KX60 1983-2003 648M04500

    Wiseco Piston Kit 45.00mm 2.00mm Oversize Kawasaki KX60 1983-2003 648M04500

    WISECO

    $134.95
    When your KX60's stock piston reaches its limit, a quality replacement isn't optional—it's essential for maintaining compression, ring seal, and reliability through the heat cycles of aggressive riding. The Wiseco 648M04500 Pro-Lite Piston Kit delivers...
    09100344
    SKU:
    09100344
    Availability:
    Ships Same Business Day
    Weight:
    0.35 LBS
    BORE - OVERSIZE METRIC:
    +2.00 MM
    ENGINE TYPE:
    2-STROKE
    RIDING STYLE:
    OFF-ROAD
    DISPLACEMENT:
    60 CC
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    BORE - OVERSIZE:
    +2,00 MM
    BORE SIZE METRIC:
    45.00 MM
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    STROKE LENGTH METRIC:
    41.60 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $134.95
    Subtotal:
  • Wiseco Piston Kit 54mm for Suzuki RM125 2004-2007 835M05400

    Wiseco Piston Kit 54mm for Suzuki RM125 2004-2007 835M05400

    WISECO

    $144.95
    If you're running a 2004-2007 Suzuki RM125 and want to reclaim lost compression, boost throttle response, and extend engine life, a quality piston kit is non-negotiable. The Wiseco 835M05400 Pro-Lite delivers the precision bore diameter and forged...
    09100357
    SKU:
    09100357
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    BORE - OVERSIZE METRIC:
    STANDARD
    DISPLACEMENT:
    125 CC
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    BORE - OVERSIZE:
    STANDARD
    BORE SIZE METRIC:
    54.00 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    STROKE LENGTH METRIC:
    54.50 MM
    ENGINE TYPE:
    2-STROKE
    MODEL:
    PRO-LITE
    RIDING STYLE:
    OFF-ROAD
    Qty in Cart: 0
    Quantity:
    Price:
    $144.95
    Subtotal:
  • Wiseco KX250 1993-2001 Piston Kit 68.50mm PK1291

    Wiseco KX250 1993-2001 Piston Kit 68.50mm PK1291

    WISECO

    $294.95
    If you're running a vintage KX250 and want measurable gains in top-end power and engine reliability, a quality piston kit is non-negotiable. The Wiseco PK1291 delivers precision-forged internals that handle sustained high RPM loads without compromise,...
    09030547
    SKU:
    09030547
    Availability:
    Ships Same Business Day
    Weight:
    1.20 LBS
    BORE - OVERSIZE:
    +2,10 MM
    SKIRT COATING:
    NON-COATED
    STROKE LENGTH METRIC:
    72.00 MM
    BORE - OVERSIZE METRIC:
    +2.10 MM
    PISTON DIAMETER METRIC:
    68.45 MM
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    DISPLACEMENT:
    249 CC
    ENGINE TYPE:
    2-STROKE
    MODEL:
    PRO-LITE
    TYPE:
    TOP END
    BORE SIZE METRIC:
    68.50 MM
    PRODUCT NAME:
    REBUILD KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $294.95
    Subtotal:
  • Wiseco Yamaha YZ250F 2001-2004 Piston Kit with Gaskets PK1241

    Wiseco Yamaha YZ250F 2001-2004 Piston Kit with Gaskets PK1241

    WISECO

    $294.95
    When your YZ250F's top end starts showing wear, a complete piston and gasket kit is the most reliable path to restoring full compression and power delivery. Wiseco's PK1241 gives you OEM-spec precision with forged aluminum construction that handles the...
    09030554
    SKU:
    09030554
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    COMPRESSION RATIO IMPERIAL:
    12.7:1
    DISPLACEMENT:
    249 CC
    PISTON DIAMETER METRIC:
    76.95 MM
    PRODUCT NAME:
    REBUILD KIT
    BORE SIZE METRIC:
    77.00 MM
    ENGINE TYPE:
    4-STROKE
    MODEL:
    FORGED SERIES
    STROKE LENGTH METRIC:
    53.60 MM
    TYPE:
    TOP END
    PISTON MATERIAL:
    2618 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $294.95
    Subtotal:
  • Wiseco Piston Kit 77mm 14.1:1 for 2004-2005 Kawasaki KX250F PK1239

    Wiseco Piston Kit 77mm 14.1:1 for 2004-2005 Kawasaki KX250F PK1239

    WISECO

    $339.95
    If you're rebuilding your 2004–2005 KX250F or pushing it to its limits in competition, piston wear or damage will kill your power delivery and throttle response. The Wiseco PK1239 restores full compression and horsepower with a forged-aluminum top end...
    09030556
    SKU:
    09030556
    Availability:
    Ships Same Business Day
    Weight:
    1.35 LBS
    COMPRESSION RATIO IMPERIAL:
    14.1:1
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    BORE SIZE METRIC:
    77.00 MM
    DISPLACEMENT:
    250 CC
    ENGINE TYPE:
    4-STROKE
    MODEL:
    FORGED SERIES
    SKIRT COATING:
    NON-COATED
    STROKE LENGTH METRIC:
    53.60 MM
    PISTON MATERIAL:
    2618 ALUMINUM ALLOY
    PRODUCT NAME:
    REBUILD KIT
    PISTON DIAMETER METRIC:
    76.96 MM
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $339.95
    Subtotal:
  • Total: items /

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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

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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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