Boyesen Power Reeds - 640 Yamaha YZ250 1978-1982 & 1989, IT250 1979-1983

img{max-width:100%}BOYESEN POWER REEDS FITS: 1989 - YZ250WR 1989 - YZ250 1984 - It490 1983 - It250 1983 - YZ490 1983 - It490 1982 - It465 1982 - YZ490 1982 - YZ250 1982 - It250 1981 - It465 1981 - YZ250 1981 - It250 1980 - YZ250 1980 - It425 1980 - It250 1979 - YZ250 1979 - It250 1979 - It400 1979 - YZ400 1978 - YZ250 Brand New - Actual Kit Components Shown In Photo MADE IN USA This is a replacement to fit on the stock OEM Reed Cage. Does not fit aftermarket reed cages such as Boyesen RAD Valve or VFORCE. Please check and verify before ordering. REVOLUTIONARY PERFORMANCE Boyesen's patented dual-stage design incorporates a specially shaped top reed and a ported bottom reed. The top reed is lightweight and resilient for crisp throttle response at partial throttle or low RPMs. The stiffer, bottom reed is ported to provide maximum flow and horsepower at higher RPMs. More valves equals more power by creating: More Air Velocity. The multi-port feature of the bottom reed creates more channels for the charge, delivering increased velocity to the intake ports. More Overall Power. Dual-stage reeds work in unison to perform efficiently throughout the entire powerband. The difference in stiffness between the top reed and the bottom reed allow the reeds to respond quickly and accurately to changes in engine pressure. This translates into quicker acceleration, crisper throttle response and increased horsepower throughout the powerband. THE BENEFITS• Quicker acceleration for that all-important holeshot. • Crisper throttle response for fast corner exits and surer jumps. • More horsepower throughout the powerband for guaranteed performance. • Improved engine efficiency and fuel economy for the long distance rider. • Longer life - Boyesen Power Reeds outlast all other aftermarket reed petals. Return/Exchange Policy - If for any reason you aren't happy with your purchase you may return or exchange the product within 30 days of the delivery date. The product must be unused, in re-sellable condition and include all original packaging and/or tags. Shipping costs for all returns or exchanges are paid at the buyers expense unless a mistake was made on our part.   If you have received the wrong item please contact us immediately. We will fix the problem by shipping a replacement.International Buyers – Import duties, taxes, customs fees, VAT, GST and other associated import fees are not included in the item price or shipping cost. These fees and charges are the buyer's responsibility. These fees are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges.We cannot mark items as "gift" or change export value. PO BOX - If you have a PO BOX, please provide BOTH PO Box and physical street address at checkout.