{"product_id":"boyesen-674-dual-stage-motorcycle-reed-valve-reeds-for-yamaha-pw50-and-yt60","title":"Boyesen 674 Dual-Stage Motorcycle Reed Valve Reeds for Yamaha PW50 and YT60","description":"\u003cp\u003eUpgrade the intake performance of your Yamaha mini motorcycle with Boyesen 674 dual-stage reed valve reeds. Designed to improve throttle response, airflow, and overall engine performance, these replacement reeds provide a practical performance enhancement for riders seeking stronger low-speed operation and improved engine efficiency. The dual-stage design allows the reeds to open and close more quickly, helping deliver better response across the engine’s operating range.\u003c\/p\u003e\u003cp\u003eBoyesen 674 reeds are engineered to provide greater low-pressure, low-throttle response, increased velocity, and a larger effective flow area. This design can produce noticeable horsepower improvements with only a minor component change, while also supporting longer overall service life. The reed construction is designed so that an accidental break does not cause engine damage, adding durability and peace of mind during regular riding.\u003c\/p\u003e\u003cp\u003eThese Boyesen motorcycle reeds fit 1981–1988 Yamaha PW50 models and 1984–1985 Yamaha YT60 Zinger models. Verify the motorcycle model and year before installation to ensure proper application. Manufacturer part number 674 and vendor part number 674 identify this Boyesen replacement performance reed set.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDual-stage reed design for improved intake performance\u003c\/li\u003e\n\u003cli\u003eMinor component change can provide significant horsepower improvements\u003c\/li\u003e\n\u003cli\u003eFaster reed opening and closing for responsive engine operation\u003c\/li\u003e\n\u003cli\u003eImproved low-pressure and low-throttle response\u003c\/li\u003e\n\u003cli\u003eGreater intake velocity for enhanced engine performance\u003c\/li\u003e\n\u003cli\u003eIncreased effective flow area\u003c\/li\u003e\n\u003cli\u003eLonger overall service life\u003c\/li\u003e\n\u003cli\u003eDesigned to prevent engine damage if a reed breaks\u003c\/li\u003e\n\u003cli\u003eFits 1981–1988 Yamaha PW50 models\u003c\/li\u003e\n\u003cli\u003eFits 1984–1985 Yamaha YT60 Zinger models\u003c\/li\u003e\n\u003cli\u003eBrand: Boyesen\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: 674\u003c\/li\u003e\n\u003cli\u003eVendor part number: 674\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n1981 Yamaha PW 50\u003cbr\u003e\n1982 Yamaha PW 50\u003cbr\u003e\n1983 Yamaha PW 50\u003cbr\u003e\n1984 Yamaha PW 50\u003cbr\u003e\n1984 Yamaha YT60 Zinger\u003cbr\u003e\n1985 Yamaha PW 50\u003cbr\u003e\n1985 Yamaha YT60 Zinger\u003cbr\u003e\n1986 Yamaha PW 50\u003cbr\u003e\n1987 Yamaha PW 50\u003cbr\u003e\n1988 Yamaha PW 50\u003cbr\u003e\n1989 Yamaha PW 50\u003cbr\u003e\n1990 Yamaha PW 50\u003cbr\u003e\n1991 Yamaha PW 50\u003cbr\u003e\n1992 Yamaha PW 50\u003cbr\u003e\n1993 Yamaha PW 50\u003cbr\u003e\n1994 Yamaha PW 50\u003cbr\u003e\n1995 Yamaha PW 50\u003cbr\u003e\n1996 Yamaha PW 50\u003cbr\u003e\n1997 Yamaha PW 50\u003cbr\u003e\n1998 Yamaha PW 50\u003cbr\u003e\n1999 Yamaha PW 50\u003cbr\u003e\n2000 Yamaha PW 50\u003cbr\u003e\n2001 Yamaha PW 50\u003cbr\u003e\n2002 Yamaha PW 50\u003cbr\u003e\n2003 Yamaha PW 50\u003cbr\u003e\n2004 Yamaha PW 50\u003cbr\u003e\n2005 Yamaha PW 50\u003cbr\u003e\n2006 Yamaha PW 50\u003cbr\u003e\n2007 Yamaha PW 50\u003cbr\u003e\n2008 Yamaha PW 50\u003cbr\u003e\n2009 Yamaha PW 50\u003cbr\u003e\n2012 Yamaha PW 50\u003cbr\u003e\n2013 Yamaha PW 50\u003cbr\u003e\n2014 Yamaha PW 50\u003cbr\u003e\n2015 Yamaha PW 50\u003cbr\u003e\n2016 Yamaha PW 50\u003cbr\u003e\n2017 Yamaha PW 50\u003cbr\u003e\n2018 Yamaha PW 50\u003cbr\u003e\n2019 Yamaha PW 50\u003cbr\u003e\n2020 Yamaha PW 50\u003cbr\u003e\n2021 Yamaha PW 50\u003cbr\u003e\n2022 Yamaha PW 50\u003cbr\u003e\n2023 Yamaha PW 50\u003cbr\u003e\n2024 Yamaha PW 50","brand":"BOYESEN","offers":[{"title":"Default Title","offer_id":67549822910699,"sku":"59-7674","price":22.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/c1e8-5e022cfd85d3e.jpg?v=1790695626","url":"https:\/\/ctracingservices.com\/products\/boyesen-674-dual-stage-motorcycle-reed-valve-reeds-for-yamaha-pw50-and-yt60","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}