{"product_id":"wiseco-pk1157-piston-kit-yamaha-pw50-moto-house-mx","title":"Wiseco Forged Series Piston Kit with Gaskets PK1157 — Yamaha PW50 1985-2026","description":"\u003ch1\u003e\u003cstrong\u003eWiseco Forged Series Piston Kit with Gaskets PK1157 — Yamaha PW50 1985-2026\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eWiseco Forged Series Piston Kit\u003c\/strong\u003e is designed to bring legendary performance and reliability to your Yamaha PW50. Built for the unique demands of this 49cc 2-stroke powerhouse, each piston is forged from high-quality 4032 aluminum alloy. These pistons utilize dedicated forgings and advanced lightening operations to provide an \u003cstrong\u003eoptimized strength-to-weight ratio\u003c\/strong\u003e, ensuring your bike runs smoother and lasts longer.\u003c\/p\u003e\n\u003cp\u003eThis comprehensive kit simplifies your \u003cstrong\u003etop-end rebuild\u003c\/strong\u003e by including everything you need: the piston, ring set, wrist pin, circlips, top-end bearings, and a complete gasket set. Engineered, forged, and machined in the USA, Wiseco components are the gold standard for riders who demand premium performance and maximum durability on every ride.\u003c\/p\u003e\n\u003ch3\u003eTop Features: Wiseco Forged Series Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDedicated forgings with optimized strength-to-weight ratio for improved responsiveness\u003c\/li\u003e\n\u003cli\u003eComplete rebuild kit includes piston, rings, wrist pin, circlips, bearing, and gaskets\u003c\/li\u003e\n\u003cli\u003eEngineered and manufactured specifically for the Yamaha PW50 2-stroke engine\u003c\/li\u003e\n\u003cli\u003eCrafted in the USA from premium 4032 aluminum alloy for superior durability\u003c\/li\u003e\n\u003cli\u003eDesigned to exceed OEM standards for longevity and performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePlease review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eFitment List\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; margin-top: 15px; margin-bottom: 15px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f7f7f7;\"\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eYear Range\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Brand\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Model \u0026amp; Sub-Model\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2010-2011\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYamaha\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003ePW 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e1985-2009, 2012-2026\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eYamaha\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003ePW50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this kit include the top-end needle bearing?\u003c\/strong\u003e\u003cbr\u003eA: Yes, this Wiseco kit is truly comprehensive and includes the necessary bearings along with the piston, rings, and gasket set for your PW50.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why choose a forged piston over cast?\u003c\/strong\u003e\u003cbr\u003eA: Forged pistons like these from Wiseco are significantly stronger and more resistant to fatigue, which helps prevent failure during the high-stress conditions of off-road riding.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e When working on the PW50, take the time to clean the carbon buildup out of the exhaust port while the cylinder is off. A restricted exhaust port kills performance more than almost anything else on these small 2-strokes. Also, make sure to coat the cylinder walls and piston rings with fresh 2-stroke oil during assembly to prevent scoring on the initial startup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/yamaha-pw50-performance-upgrades-engine-mods-accessories-moto-house-mx\"\u003eYamaha PW50 Performance Parts \u0026amp; Upgrades\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/mx-off-road-chains\"\u003eMX Chains \u0026amp; Drivetrain Components\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003ePremium Motorcycle Chemicals \u0026amp; Assembly Lubes\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eAt Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMoto-House MX – Choice of Champions\u003c\/strong\u003e – Clermont \/ Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":39786752606291,"sku":"PK1157","price":154.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/wiseco-top-end-kit-1981-2022-yamaha-pw50-piston-rings-gaskets-pk1157-398938.jpg?v=1738050909","url":"https:\/\/motohousemx.com\/products\/wiseco-pk1157-piston-kit-yamaha-pw50-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}