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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 Honda CR500R 1984-2001 91.00mm 871M09100

    Wiseco Piston Kit Honda CR500R 1984-2001 91.00mm 871M09100

    WISECO

    $255.95
    The Wiseco Piston Kit is engineered for Honda CR500R two-stroke engines that demand reliability at extreme RPM. This 91.00mm, 2.0mm oversize piston delivers improved combustion efficiency and responsive power delivery, making it essential for riders who...
    09102026
    SKU:
    09102026
    Availability:
    Ships Same Business Day
    Weight:
    1.50 LBS
    BORE - OVERSIZE:
    +2,00 MM
    BORE SIZE METRIC:
    91.00 MM
    DISPLACEMENT:
    472 CC
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    SKIRT COATING:
    ARMORGLIDE®
    STROKE LENGTH METRIC:
    76.00 MM
    UNITS:
    EACH
    BORE - OVERSIZE METRIC:
    +2.00 MM
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    ALUMINUM
    RIDING STYLE:
    OFF-ROAD
    DISPLACEMENT:
    491 CC
    $255.95
    Qty in Cart: 0
    Quantity:
    Price:
    $255.95
    Subtotal:
  • Wiseco Piston Kit 56.00 mm Bore Yamaha YZ125 2005-2021 845M05600

    Wiseco Piston Kit 56.00 mm Bore Yamaha YZ125 2005-2021 845M05600

    WISECO

    $174.95
    If you're running a YZ125 and want measurable gains in displacement-dependent power and throttle response, a quality piston upgrade is one of the most direct paths forward. The Wiseco 56.00 mm piston kit delivers a +2.00 mm bore increase—translating to...
    09100572
    SKU:
    09100572
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    DISPLACEMENT:
    134 CC
    BORE - OVERSIZE METRIC:
    +2.00 MM
    MODEL:
    PRO-LITE
    PISTON MATERIAL:
    FORGED
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    54.50 MM
    BORE - OVERSIZE:
    +2,00 MM
    BORE SIZE METRIC:
    56.00 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $174.95
    Subtotal:
  • Wiseco Piston Kit Standard 77mm 12.7:1 Compression Yamaha YZ250F 2001-2004 4872M07700

    Wiseco Piston Kit Standard 77mm 12.7:1 Compression Yamaha YZ250F 2001-2004 4872M07700

    WISECO

    $174.95
    The Wiseco Piston Kit delivers precision engineering where it matters most—inside your YZ250F's combustion chamber. A properly matched piston assembly is critical for maintaining compression ratios, maximizing power transfer, and ensuring long-term...
    09100573
    SKU:
    09100573
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    BORE SIZE METRIC:
    77.00 MM
    STROKE LENGTH METRIC:
    53.60 MM
    BORE - OVERSIZE METRIC:
    STANDARD
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    DISPLACEMENT:
    249 CC
    BORE - OVERSIZE:
    STANDARD
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    Qty in Cart: 0
    Quantity:
    Price:
    $174.95
    Subtotal:
  • Wiseco Piston Kit 64mm Bore Suzuki TS185 1971-1981 176M06400

    Wiseco Piston Kit 64mm Bore Suzuki TS185 1971-1981 176M06400

    WISECO

    $162.95
    A worn or damaged piston directly limits your TS185's performance and reliability—whether you're tackling technical trail sections or pushing hard on the track. Wiseco's high-silicon alloy construction delivers the strength and thermal stability needed...
    176M06400
    SKU:
    176M06400
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    57.00 MM
    UNITS:
    KIT
    DISPLACEMENT:
    183 CC
    BORE - OVERSIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    BORE - OVERSIZE:
    STANDARD
    BORE SIZE METRIC:
    64.00 MM
    MODEL:
    FORGED SERIES
    PISTON DIAMETER METRIC:
    63.92 MM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    SKIRT COATING:
    NON-COATED
    $162.95
    Qty in Cart: 0
    Quantity:
    Price:
    $162.95
    Subtotal:
  • Wiseco Piston Kit 0.50mm Oversize for Suzuki DS185 1978-1980 176M06450

    Wiseco Piston Kit 0.50mm Oversize for Suzuki DS185 1978-1980 176M06450

    WISECO

    $162.95
    When you're pushing your DS185 to its limits on the trail or track, stock pistons become your weakest link. The Wiseco 0.50mm oversize piston kit delivers the durability and precision fit needed to handle higher compression and aggressive riding, while...
    176M06450
    SKU:
    176M06450
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    BORE - OVERSIZE METRIC:
    +0.50 MM
    MODEL:
    FORGED SERIES
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    SKIRT COATING:
    NON-COATED
    BORE - OVERSIZE:
    +0,50 MM
    PISTON DIAMETER METRIC:
    64.42 MM
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    57.00 MM
    UNITS:
    KIT
    DISPLACEMENT:
    183 CC
    BORE SIZE METRIC:
    64.50 MM
    ENGINE TYPE:
    2-STROKE
    PRODUCT NAME:
    PISTON KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $162.95
    Subtotal:
  • Wiseco Piston Kit 1.0mm Oversize 65.92mm for Suzuki TS185 1971-1981 176M06500

    Wiseco Piston Kit 1.0mm Oversize 65.92mm for Suzuki TS185 1971-1981 176M06500

    WISECO

    $154.95
    A worn or damaged piston forces your TS185 into the shop and out of commission. The Wiseco 1.0mm oversize piston kit restores compression, power delivery, and engine reliability with a complete ring and circlip assembly—no secondary purchases needed...
    176M06500
    SKU:
    176M06500
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    BORE - OVERSIZE:
    +1,00 MM
    PRODUCT NAME:
    PISTON KIT
    DISPLACEMENT:
    183 CC
    BORE SIZE METRIC:
    65.00 MM
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE METRIC:
    +1.00 MM
    MODEL:
    FORGED SERIES
    PISTON DIAMETER METRIC:
    64.92 MM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    SKIRT COATING:
    NON-COATED
    STROKE LENGTH METRIC:
    57.00 MM
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $154.95
    Subtotal:
  • Wiseco Piston Kit Kawasaki JS650 1987-1993 76.50mm Bore WK1017

    Wiseco Piston Kit Kawasaki JS650 1987-1993 76.50mm Bore WK1017

    WISECO

    $344.95
    If you're rebuilding a 2-stroke JS650, you need pistons engineered to handle the extreme heat and pressure cycles that stock components simply can't sustain. Wiseco's high-silicone forged piston kit delivers the durability and precision ring fit that...
    WK1017
    SKU:
    WK1017
    Availability:
    Ships Same Business Day
    Weight:
    2.50 LBS
    BORE - OVERSIZE:
    +0,50 MM
    DISPLACEMENT:
    643 CC
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    BORE SIZE METRIC:
    76.50 MM
    MODEL:
    FORGED SERIES
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    BORE - OVERSIZE METRIC:
    +0.50 MM
    PRODUCT NAME:
    REBUILD KIT
    TYPE:
    TOP END
    PISTON DIAMETER METRIC:
    76.40 MM
    RIDING STYLE:
    WATERCRAFT
    $344.95
    Qty in Cart: 0
    Quantity:
    Price:
    $344.95
    Subtotal:
  • Wiseco Piston Kit for Suzuki DR350 1990-1999 4576M07900

    Wiseco Piston Kit for Suzuki DR350 1990-1999 4576M07900

    WISECO

    $174.95
    If you're running a Suzuki DR350, piston wear directly impacts compression, throttle response, and fuel efficiency—making a quality replacement essential for reliable performance. The Wiseco Piston Kit delivers OEM-compatible dimensions with optimized...
    09102905
    SKU:
    09102905
    Availability:
    Ships Same Business Day
    Weight:
    0.85 LBS
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    BORE - OVERSIZE:
    STANDARD
    DISPLACEMENT:
    349 CC
    BORE SIZE METRIC:
    79.00 MM
    STROKE LENGTH METRIC:
    71.20 MM
    BORE - OVERSIZE METRIC:
    STANDARD
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $174.95
    Subtotal:
  • Wiseco Piston Kit 82.00mm 10.5:1 Suzuki DR350 1990-1999 4576M08200

    Wiseco Piston Kit 82.00mm 10.5:1 Suzuki DR350 1990-1999 4576M08200

    WISECO

    $194.95
    If you're running a Suzuki DR350 and want to reclaim lost compression or build a higher-output engine, a quality piston kit is non-negotiable. Wiseco pistons are engineered to tighter tolerances than OEM parts, delivering improved combustion efficiency...
    09102907
    SKU:
    09102907
    Availability:
    Ships Same Business Day
    Weight:
    0.85 LBS
    BORE - OVERSIZE METRIC:
    +3.00 MM
    STROKE LENGTH METRIC:
    71.20 MM
    DISPLACEMENT:
    349 CC
    BORE SIZE METRIC:
    82.00 MM
    PISTON MATERIAL:
    FORGED
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    BORE - OVERSIZE:
    +3,00 MM
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    $194.95
    Qty in Cart: 0
    Quantity:
    Price:
    $194.95
    Subtotal:
  • Wiseco Piston Kit 83mm 10.5:1 Compression Suzuki DR350 1990-1999 4576M08300

    Wiseco Piston Kit 83mm 10.5:1 Compression Suzuki DR350 1990-1999 4576M08300

    WISECO

    $219.95
    Stock pistons in your DR350 won't cut it if you're pushing higher RPMs or looking for reliable longevity in a frequently-ridden machine. The Wiseco 83mm piston kit delivers the precision fit and material quality you need to maximize engine efficiency...
    09102908
    SKU:
    09102908
    Availability:
    Ships Same Business Day
    Weight:
    1.10 LBS
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    BORE - OVERSIZE:
    +4,00 MM
    BORE - OVERSIZE METRIC:
    +4.00 MM
    PISTON MATERIAL:
    FORGED
    STROKE LENGTH METRIC:
    71.20 MM
    BORE SIZE METRIC:
    83.00 MM
    DISPLACEMENT:
    349 CC
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    $219.95
    Qty in Cart: 0
    Quantity:
    Price:
    $219.95
    Subtotal:
  • Wiseco Piston Kit Yamaha MX80 1980-1982 1.0mm 222M04800

    Wiseco Piston Kit Yamaha MX80 1980-1982 1.0mm 222M04800

    WISECO

    $138.95
    When your Yamaha MX80 engine is pushing hard on the track or trail, stock pistons won't cut it—you need a component engineered for sustained high-RPM performance and reliability. This Wiseco piston kit delivers the strength and precision necessary to...
    222M04800
    SKU:
    222M04800
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    BORE - OVERSIZE:
    +1,00 MM
    PRODUCT NAME:
    PISTON KIT
    MODEL:
    FORGED SERIES
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    SKIRT COATING:
    NON-COATED
    STROKE LENGTH METRIC:
    42.00 MM
    BORE SIZE METRIC:
    48.00 MM
    PISTON DIAMETER METRIC:
    47.95 MM
    BORE - OVERSIZE METRIC:
    +1.00 MM
    DISPLACEMENT:
    72 CC
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $138.95
    Subtotal:
  • Wiseco Piston Assembly 49.5mm Bore Kawasaki KE100 1986-2000 369M04950

    Wiseco Piston Assembly 49.5mm Bore Kawasaki KE100 1986-2000 369M04950

    WISECO

    $143.95
    If you're pushing your KE100 hard on the trail or in competition, your stock piston won't cut it. Wiseco's high-silicon alloy construction delivers the strength and thermal stability you need to handle sustained performance without sacrificing...
    369M04950
    SKU:
    369M04950
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    BORE SIZE METRIC:
    49.50 MM
    DISPLACEMENT:
    99 CC
    PISTON DIAMETER METRIC:
    49.45 MM
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    ENGINE TYPE:
    2-STROKE
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    MODEL:
    FORGED SERIES
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    SKIRT COATING:
    NON-COATED
    STROKE LENGTH METRIC:
    51.80 MM
    $143.95
    Qty in Cart: 0
    Quantity:
    Price:
    $143.95
    Subtotal:
  • Wiseco Piston Yamaha YZF-R1 2000-2001 50mm 374M06650

    Wiseco Piston Yamaha YZF-R1 2000-2001 50mm 374M06650

    WISECO

    $154.95
    If you're rebuilding your 2000-2001 YZF-R1 or pushing it to the limit on track, piston quality directly impacts engine longevity and power delivery. Wiseco's high-silicon alloy construction handles the thermal stress and detonation that come with...
    374M06650
    SKU:
    374M06650
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    50.00 MM
    BORE - OVERSIZE METRIC:
    +0.50 MM
    BORE SIZE METRIC:
    66.50 MM
    DISPLACEMENT:
    172 CC
    ENGINE TYPE:
    2-STROKE
    PISTON DIAMETER METRIC:
    66.45 MM
    BORE - OVERSIZE:
    +0,50 MM
    RIDING STYLE:
    OFF-ROAD
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    MODEL:
    FORGED SERIES
    PRODUCT NAME:
    PISTON KIT
    $154.95
    Qty in Cart: 0
    Quantity:
    Price:
    $154.95
    Subtotal:
  • WISECO Piston - Yamaha - .50mm 394M08550

    WISECO Piston - Yamaha - .50mm 394M08550

    WISECO

    $209.95
    A piston is the heart of your engine's combustion cycle, and choosing the right one directly impacts reliability, power delivery, and longevity. Wiseco's forged high-silicon alloy construction delivers the strength needed for both aggressive trail riding...
    394M08550
    SKU:
    394M08550
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    BORE - OVERSIZE:
    +0,50 MM
    BORE SIZE METRIC:
    85.50 MM
    DISPLACEMENT:
    397 CC
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    MODEL:
    FORGED SERIES
    PRODUCT NAME:
    PISTON KIT
    SKIRT COATING:
    NON-COATED
    BORE - OVERSIZE METRIC:
    +0.50 MM
    PISTON DIAMETER METRIC:
    85.42 MM
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    70.00 MM
    $209.95
    Qty in Cart: 0
    Quantity:
    Price:
    $209.95
    Subtotal:
  • Wiseco Piston Kit 50.00mm Oversize for Suzuki RM80 1977-1981 456M05000

    Wiseco Piston Kit 50.00mm Oversize for Suzuki RM80 1977-1981 456M05000

    WISECO

    $134.95
    If you're rebuilding a classic Suzuki RM80 or pushing one to the limit on the track, piston wear is inevitable—and worn pistons cost you compression, power, and reliability. The Wiseco 50.00mm oversize piston kit restores your engine to peak performance...
    456M05000
    SKU:
    456M05000
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    DISPLACEMENT:
    79 CC
    ENGINE TYPE:
    2-STROKE
    PISTON DIAMETER METRIC:
    49.95 MM
    BORE SIZE METRIC:
    50.00 MM
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    BORE - OVERSIZE:
    +1,00 MM
    BORE - OVERSIZE METRIC:
    +1.00 MM
    MODEL:
    FORGED SERIES
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    SKIRT COATING:
    NON-COATED
    STROKE LENGTH METRIC:
    42.00 MM
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $134.95
    Subtotal:
  • Wiseco Piston Kit 97.50mm 9:1 Compression Honda XR600R 1985-2000 4577M09750

    Wiseco Piston Kit 97.50mm 9:1 Compression Honda XR600R 1985-2000 4577M09750

    WISECO

    $239.95
    If you're rebuilding your XR600R engine or pushing higher RPMs, a worn piston directly kills power delivery and increases blowby—costing you reliability and performance. Wiseco's high-silicon alloy construction handles the thermal and mechanical stress...
    4577M09750
    SKU:
    4577M09750
    Availability:
    Ships Same Business Day
    Weight:
    1.40 LBS
    MODEL:
    FORGED SERIES
    PRODUCT NAME:
    PISTON KIT
    SKIRT COATING:
    NON-COATED
    DISPLACEMENT:
    591 CC
    PISTON MATERIAL:
    FORGED 2618 ALUMINUM
    BORE - OVERSIZE:
    +0,50 MM
    BORE - OVERSIZE METRIC:
    +0.50 MM
    BORE SIZE METRIC:
    97.50 MM
    ENGINE TYPE:
    4-STROKE
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    COMPRESSION RATIO IMPERIAL:
    9.0:1
    PISTON DIAMETER METRIC:
    97.42 MM
    STROKE LENGTH METRIC:
    80.00 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $239.95
    Subtotal:
  • Wossner Piston Kit 54.45mm for Honda CR125R 1992-1999 8020D050

    Wossner Piston Kit 54.45mm for Honda CR125R 1992-1999 8020D050

    WOSSNER

    $122.00
    If you're running a Honda CR125R that demands maximum reliability and power output, a quality piston kit is non-negotiable. The Wossner 8020D050 delivers the precision engineering and durability required for consistent performance, whether you're racing...
    09104720
    SKU:
    09104720
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    BORE - OVERSIZE:
    +0,50 MM
    MODEL:
    STANDARD SERIES
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    BORE - OVERSIZE METRIC:
    +0.50 MM
    BORE SIZE METRIC:
    54.50 MM
    DISPLACEMENT:
    125 CC
    ENGINE TYPE:
    2-STROKE
    PISTON SIZE METRIC:
    54.45 MM
    PRODUCT NAME:
    PISTON KIT
    TYPE:
    SINGLE RING
    Qty in Cart: 0
    Quantity:
    Price:
    $122.00
    Subtotal:
  • Wossner Piston Kit 53.95mm Honda CR125R 1992-1999 8020DA

    Wossner Piston Kit 53.95mm Honda CR125R 1992-1999 8020DA

    WOSSNER

    $122.00
    When running a Honda CR125R at the edge of performance, stock pistons can't handle the demands of high-RPM racing and aggressive riding. The Wossner 8020DA delivers the durability and precision needed to maintain power delivery and engine longevity, even...
    09104722
    SKU:
    09104722
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    BORE SIZE METRIC:
    54.00 MM
    PISTON SIZE METRIC:
    53.95 MM
    TYPE:
    SINGLE RING
    UNITS:
    KIT
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    MODEL:
    STANDARD SERIES
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    DISPLACEMENT:
    125 CC
    PISTON MATERIAL:
    FORGED
    Qty in Cart: 0
    Quantity:
    Price:
    $122.00
    Subtotal:
  • Wossner Piston Kit 77mm Yamaha YZ250F 2005-2007 8614DA

    Wossner Piston Kit 77mm Yamaha YZ250F 2005-2007 8614DA

    WOSSNER

    $184.00
    When you're pushing your YZ250F to the limit, stock pistons won't cut it—you need a unit engineered for sustained high-RPM abuse. The Wossner 8614DA delivers the durability and reliability that separates winners from the rest, with German precision...
    09104947
    SKU:
    09104947
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    BORE SIZE METRIC:
    77.00 MM
    COMPRESSION RATIO IMPERIAL:
    12.5:1
    PRODUCT NAME:
    PISTON KIT
    BORE - OVERSIZE METRIC:
    STANDARD
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    BORE - OVERSIZE:
    STANDARD
    ENGINE TYPE:
    4-STROKE
    MODEL:
    PRO SERIES
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PISTON SIZE METRIC:
    76.96 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $184.00
    Subtotal:
  • Wossner Piston Kit 94.98mm Yamaha YZ450F 2006-2009 8630DC

    Wossner Piston Kit 94.98mm Yamaha YZ450F 2006-2009 8630DC

    WOSSNER

    $204.00
    If you're serious about maximizing your YZ450F's power output and longevity, a quality piston kit is non-negotiable. The Wossner 8630DC delivers the durability and precision engineering needed to handle sustained high-RPM abuse without sacrificing...
    09104952
    SKU:
    09104952
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    BORE - OVERSIZE:
    +0,02 MM
    UNITS:
    KIT
    BORE SIZE METRIC:
    95.02 MM
    COMPRESSION RATIO IMPERIAL:
    12.3:1
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    94.98 MM
    PRODUCT NAME:
    PISTON KIT
    BORE - OVERSIZE METRIC:
    +0.02 MM
    MODEL:
    STANDARD SERIES
    RIDING STYLE:
    OFF-ROAD
    PISTON MATERIAL:
    FORGED
    $204.00
    Qty in Cart: 0
    Quantity:
    Price:
    $204.00
    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

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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