{"product_id":"wossner-8057da-piston-kit-1999-2000-kawasaki-kx125-standard-size-a","title":"Wossner 8057DA Piston Kit - 1999-2000 Kawasaki KX125 Standard Size A","description":"\u003ch3\u003eWossner 8057DA Standard Series Forged 2-Stroke Piston Kit - Standard Size A\u003c\/h3\u003e\n\n\u003cp\u003eRestore the hard-hitting power of your classic Kawasaki with the Wossner 8057DA Piston Kit. Specifically engineered for the 1999-2000 KX125, this Standard Size A forged kit is the premier choice for riders looking to maintain factory-spec performance with modern durability. At Moto-House MX, we know that keeping these legendary 2-strokes on the track requires high-quality internals; Wossner’s aerospace-grade forged construction provides a massive strength advantage over traditional cast pistons, ensuring your KX125 can handle high-RPM motocross use.\u003c\/p\u003e\n\n\u003cp\u003eForged from high-silicon aluminum alloy, the 8057DA features a performance-oriented single-ring design. This configuration is preferred by racers for reducing friction and allowing the engine to rev more freely, capturing that aggressive powerband the 1990s-era KX is famous for. To ensure maximum longevity, Wossner applies a permanent molybdenum disulphide skirt coating that reduces internal drag and prevents piston rock. Precision-machined for standard 54.00mm bores, this Size A (53.95mm) piston kit provides the exact tolerances needed for a professional engine refresh.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8057DA Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eStandard Size A (53.95mm):\u003c\/b\u003e Engineered for factory 54.00mm bores to maintain the precise piston-to-wall clearance required for peak efficiency.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eSingle Ring Design:\u003c\/b\u003e Reduces internal friction and reciprocating mass, allowing for faster revving and improved top-end performance.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAerospace-Grade Forging:\u003c\/b\u003e Significantly stronger and more heat-resilient than OEM cast alternatives, providing superior structural integrity.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Friction Skirt Coating:\u003c\/b\u003e Permanent molybdenum disulphide treatment minimizes drag, protects the cylinder, and ensures a quieter running engine.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eOptimized Lightness:\u003c\/b\u003e Precision machining maintains strength in critical areas like the crown while shedding unnecessary weight for improved throttle response.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Racing Kit:\u003c\/b\u003e Includes the high-performance forged piston, single ring, wrist pin, and circlips.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e The 1999-2000 Kawasaki KX125 is a favorite among vintage and evolution-class racers. To get the most out of your rebuild, ensure your cylinder plating is in good condition. Size A is the correct choice for a freshly replated cylinder or one that still measures exactly at the factory 54.00mm bore. Always verify your ring end gap before installation. For the best results, install with a fresh top-end gasket kit and use premium synthetic 2-stroke oil to keep your new forged assembly protected during break-in and beyond.\u003c\/p\u003e\n\n\u003ch3\u003eFitment List\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" style=\"width: 100%; border-collapse: collapse;\"\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eYear Range\u003c\/th\u003e\n            \u003cth\u003eVehicle Brand\u003c\/th\u003e\n            \u003cth\u003eVehicle Model\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e1999-2000\u003c\/td\u003e\n            \u003ctd\u003eKawasaki\u003c\/td\u003e\n            \u003ctd\u003eKX125\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: Is a forged piston better for older bikes like the 1999 KX125?\u003c\/b\u003e\u003cbr\u003e\nA: Absolutely. Forged pistons are much denser and less likely to shatter under extreme stress compared to older cast piston designs, making them a safer and more durable choice for vintage racing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: What are the benefits of a single ring?\u003c\/b\u003e\u003cbr\u003e\nA: A single-ring setup is designed for pure performance. It creates less drag against the cylinder wall than a dual-ring setup, which helps the engine rev faster and stay in the \"meat\" of the powerband.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Will this fit my 2001 or newer KX125?\u003c\/b\u003e\u003cbr\u003e\nA: No, this specific kit is precision-matched for the stroke and bore requirements of the 1999-2000 models. Always verify your model year before purchasing.\u003c\/p\u003e\n\n\u003ch3\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Top End Gasket Set:\u003c\/b\u003e Essential for maintaining a perfect seal and correct squish heights on your KX125.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eMotul 800 2T Factory Line:\u003c\/b\u003e High-performance lubricant to ensure your new forged piston stays protected at high RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eRestore your machine’s power and precision today. Buy now at Moto-House MX!\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eMoto-House MX – Choice of Champions\u003c\/b\u003e – is located in Clermont\/Montverde, FL. The Best Motocross\/UTV \u0026amp; ATV Shop in Central Florida. Stop by our local store in Montverde, FL or enjoy lightning-fast shipping across the USA.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Wossner 8057DA Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8057DA Forged 2-Stroke Single Ring Piston Kit for 1999-2000 Kawasaki KX125. 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