{"product_id":"wossner-8179d200-forged-piston-kit-2-00mm-yamaha-yz250-it250-dt250","title":"WOSSNER 8179D200 Forged Piston Kit +2.00mm Yamaha YZ250 IT250 DT250","description":"\u003ch3\u003eMaximum Displacement for Vintage Yamaha 2-Stroke Rebuilds\u003c\/h3\u003e\n\u003cp\u003eWhen your classic Yamaha cylinder has reached its limit, the WOSSNER 8179D200 Piston Kit provides the ultimate solution for a high-performance overbore. Designed specifically for the legendary 250cc line—including the YZ250, IT250, and DT250—this +2.00mm oversize kit allows you to save a worn cylinder and gain a bump in displacement. Forged from aerospace-grade aluminum alloy, Wossner pistons offer a level of structural integrity and heat resistance that standard cast pistons simply cannot match. Pick up this professional-grade kit at Moto-House MX and restore the compression your vintage machine deserves.\u003c\/p\u003e\n\n\u003cp\u003eThe technical engineering behind the 8179D200 focuses on reducing engine noise and increasing longevity. Each forged piston features a permanent skirt coating that minimizes friction and prevents \"piston rock,\" a common issue in older 2-stroke engines. The dual-ring design ensures a perfect seal against the 72.00mm bore, maximizing torque and power delivery across the entire RPM range. Precision-machined for lightness without compromising strength in the crown or skirt walls, this kit allows for rapid throttle response while maintaining the durability needed for rugged off-road and adventure touring.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: WOSSNER 8179D200 Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eAerospace Forged Alloy:\u003c\/b\u003e Superior strength-to-weight ratio designed to withstand the high-heat cycles of 2-stroke racing.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003e+2.00mm Oversize (72.00mm):\u003c\/b\u003e Ideal for restoring cylinders with significant wear or damage beyond standard sizes.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003ePermanent Skirt Coating:\u003c\/b\u003e Advanced dry-lubricant coating reduces internal friction and wear for a quieter top end.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eDual-Ring Sealing:\u003c\/b\u003e Provides consistent compression and improved heat dissipation for reliable power.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Precision Kit:\u003c\/b\u003e Includes the forged piston, high-tension rings, wrist pin, and circlips for a full rebuild.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExpert Pro-Tip\u003c\/h3\u003e\n\u003cp\u003eBecause a +2.00mm overbore significantly changes the engine's volume, we recommend checking your spark plug color after the first few rides to ensure your air\/fuel mixture is correctly jetted for the increased displacement.\u003c\/p\u003e\n\n\u003ch3\u003eFitment List\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\"\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 \u0026amp; Size\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003e1978-1980\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eIT250\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e1978-1979\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYZ250\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e1974-1979\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eDT250\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e1974-1978\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eTY250\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e1973-1975\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eMX250\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e1973\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eDT3 (250cc)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e1972\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eDT2 (250cc)\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: How much does this increase my displacement?\u003c\/b\u003e\u003cbr\u003e\nA: This +2.00mm oversize (72.00mm bore) increases the standard 246cc displacement to approximately 260cc, providing a noticeable boost in torque.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Does this kit require special rings?\u003c\/b\u003e\u003cbr\u003e\nA: The kit comes with specific Wossner +2.00mm rings; always use the rings provided to ensure correct tension and sealing.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Is the wrist pin included?\u003c\/b\u003e\u003cbr\u003e\nA: Yes, every Wossner kit at Moto-House MX includes the piston, rings, wrist pin, and circlips.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eRecommended Pairings:\u003c\/b\u003e Top-End Gasket Kits, 2-Stroke Premix Oil, and New Wrist Pin Bearings.\u003c\/p\u003e\n\n\u003cp\u003eStop by our local store in Montverde, FL or enjoy lightning-fast shipping across the USA.\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.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"WOSSNER 8179D200 Piston Kit - Yamaha 250cc\",\n  \"image\": \"\",\n  \"description\": \"High-performance +2.00mm (72.00mm) forged 2-stroke piston kit for vintage Yamaha YZ250, IT250, and DT250 models.\",\n  \"sku\": \"8179D200\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"WOSSNER\"\n  },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"priceCurrency\": \"USD\"\n  }\n}\n\u003c\/script\u003e","brand":"WOSSNER","offers":[{"title":"Default Title","offer_id":44496007037011,"sku":"8179D200","price":182.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/480464.png?v=1776230770","url":"https:\/\/motohousemx.com\/products\/wossner-8179d200-forged-piston-kit-2-00mm-yamaha-yz250-it250-dt250","provider":"Moto-House MX","version":"1.0","type":"link"}