{"product_id":"644","title":"BOYESEN BOYESEN 1990 YAMAHA YZ250WR M\/C REED 644 PART NUMBER 644","description":"This listing is listed with our fitment link on the home page and will fit many years and make. Please check it out on our home page to make sure it fits year, make and model search… BOYESEN BOYESEN 1990 YAMAHA YZ250WR M\/C REED 644 PART NUMBER 644 .  The vendor part number is 644   Read title carefully to know what you are getting  Catalog decription… \u003cp\u003eBoyesen’s revolutionary dual-stage reed design delivers more\u003cbr\u003eusable power than stock  Your original one-stage reed operates most effectively only within a narrow RPM range  Boyesen’s one soft reed on top of one firm flow-through reed gives you a wide range of intake control, plus increased intake velocity  Your original reeds can’t possibly duplicate that performance \u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDual stage reeds\u003c\/li\u003e\n\u003cli\u003eMinor change gives major H P  improvements\u003c\/li\u003e\n\u003cli\u003eFaster opening and closing\u003c\/li\u003e\n\u003cli\u003eGreater low pressure (Low-throttle) response\u003c\/li\u003e\n\u003cli\u003eGreater velocity and flow area\u003c\/li\u003e\n\u003cli\u003eLonger overall life\u003c\/li\u003e\n\u003cli\u003eNo engine damage if broken\u003c\/li\u003e\n\u003cli\u003eCarbon pro has new carbon fiber reed for quicker response\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003ePRO SERIES IS THE ULTIMATE PERFORMANCE PRODUCT\u003c\/strong\u003e\u003cbr\u003eBoyesen Pro Series reeds use a carbon fiber top reed coupled with a durable fiberglass\/epoxy bottom reed  Pro Series reeds offer a quick and accurate reaction to piston speed for smooth dependable throttle response \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat advantage do Pro Series Reeds have over Power Reeds?\u003c\/strong\u003e\u003cbr\u003eBoyesen Pro Series dual-stage reeds combine a carbon-fiber top reed with a fiberglass bottom reed for unrivaled performance  The Pro Series Reeds are more responsive than our traditional Power Reeds  The carbon-fiber top reed has excellent response characteristics that provides even quicker acceleration, stronger throttle response, and more over-rev than our standard Power Reeds  The fiberglass bottom reed provides stability and longer reed life \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eXCROSS DUAL CARBON WEAVE\u003cbr\u003eModel-Specific variable tension reed petals \u003c\/strong\u003e\u003cbr\u003eBoyesen Pro Series Reed's Multi-Staged reed stacks feature Aerospace carbon material interwoven into tension combinations that maximize power delivery and peak horsepower  Boyesen engineers specifically tune the carbon matrix tension using a proprietary weave formula that is tested and optimized for each make\/model\/year machine \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eT2 EPOXY\u003cbr\u003eThe most durable materials  The most lifespan  \u003c\/strong\u003e\u003cbr\u003eThe RC2 Series Rad Valve now features category-leading toughening additives to increase reed petal lifespan by resisting breakdown from damaging agents found in fuel \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMS PLUS FLOW OPTIMIZATION\u003cbr\u003eOne reed petal is NOT enough!\u003c\/strong\u003e\u003cbr\u003eThe reed petals in modern 2 stroke Offroad engines take an incredible amount of abuse! At peak RPM reed petals are opening and closing hundreds of times per second  Over time, a single reed loses its ability to regulate flow rates in proper proportions  This causes a loss of reed petal reaction and reduces the consistency of peak horsepower \u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e","brand":"BOYESEN","offers":[{"title":"Default Title","offer_id":15358708777031,"sku":"au-27644","price":40.88,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1040\/7626\/products\/27607_3c1240aa-cdc5-41af-9420-5a41ad3ca2bd.jpg?v=1541452752","url":"https:\/\/www.mxstuff4u.com\/products\/644","provider":"MXSTUFF4U","version":"1.0","type":"link"}