{"product_id":"boyesen-604-dual-stage-motorcycle-reeds-for-yamaha-yz125-and-ytz250","title":"Boyesen 604 Dual-Stage Motorcycle Reeds for Yamaha YZ125 and YTZ250","description":"\u003cp\u003eUpgrade intake performance with Boyesen 604 dual-stage motorcycle reeds, designed for select Yamaha two-stroke applications. These replacement reed petals are engineered to improve the response and efficiency of the engine’s intake system while maintaining dependable operation for trail, motocross, and recreational riding.\u003c\/p\u003e\u003cp\u003eThe Boyesen 604 reed design uses dual-stage construction to support faster opening and closing, improved low-pressure response, increased intake velocity, and greater flow area. This helps provide more responsive low-throttle performance and stronger overall engine breathing with a relatively minor component change. The reeds are also designed for extended service life, making them a practical replacement or performance upgrade for compatible machines.\u003c\/p\u003e\u003cp\u003eFitment includes the 1985 and 1986 Yamaha YTZ250 Tri-Z, along with the 1988 through 1992 Yamaha YZ125. Verify the year, model, and existing reed assembly before installation to ensure proper application. This product is manufactured by Boyesen and identified by manufacturer part number 604 and vendor part number 59-7604.\u003c\/p\u003e\u003cp\u003eBoyesen dual-stage reeds are designed with a safety-focused construction that helps prevent engine damage if a reed breaks. Installation should be completed according to the motorcycle manufacturer’s service procedures, with all intake components inspected and properly sealed before operation.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDual-stage reed construction for improved intake control\u003c\/li\u003e\n\u003cli\u003eFaster opening and closing for responsive engine operation\u003c\/li\u003e\n\u003cli\u003eImproved low-pressure and low-throttle response\u003c\/li\u003e\n\u003cli\u003eIncreased intake velocity and flow area\u003c\/li\u003e\n\u003cli\u003eDesigned for longer overall service life\u003c\/li\u003e\n\u003cli\u003eSafety-focused design helps reduce the risk of engine damage if a reed breaks\u003c\/li\u003e\n\u003cli\u003eFits 1985-1986 Yamaha YTZ250 Tri-Z and 1988-1992 Yamaha YZ125\u003c\/li\u003e\n\u003cli\u003eBrand: Boyesen\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: 604\u003c\/li\u003e\n\u003cli\u003eVendor part number: 59-7604\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n1985 Yamaha YTZ250 Tri-Z\u003cbr\u003e\n1986 Yamaha YTZ250 Tri-Z\u003cbr\u003e\n1988 Yamaha YZ125\u003cbr\u003e\n1989 Yamaha YZ125\u003cbr\u003e\n1990 Yamaha YZ125\u003cbr\u003e\n1991 Yamaha YZ125\u003cbr\u003e\n1992 Yamaha YZ125","brand":"BOYESEN","offers":[{"title":"Default Title","offer_id":67549843980523,"sku":"59-7604","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/e381-5cc05ff04aa20.jpg?v=1790696416","url":"https:\/\/ctracingservices.com\/products\/boyesen-604-dual-stage-motorcycle-reeds-for-yamaha-yz125-and-ytz250","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}