Boyesen 644 Boyesen Power Reeds Yamaha Dirt Bike SKI-DOO-MX-Z-500-SB-2000 RT seat provides superior bottom

RT seat provides superior bottom and side containment

Motion Pro Black Vinyl Throttle Pull Cable For Yamaha ZS50Q 50Q T-4 1979-1987

Part Number: SC-A0110

Part Number: JTR269

Part Number: 04-6800

Boyesen 644 Boyesen Power Reeds Yamaha Dirt Bike SKI-DOO-MX-Z-500-SB-2000 RT seat provides superior bottomBoyesens revolutionary dual stage reed design delivers more usable power than stock. Your original one stage reed operates most effectively only within a narrow RPM range. Boyesens 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 cant possibly duplicate that performance. Dual stage reeds Minor change gives major H. P. improvements Faster opening and closing