NakedViffer

Not to rain on your parade here, but I don't think taller gearing is going to help top speed much, and will likely hurt. There is an excellent web page for learning the effect of gearing changes, Gearing Commander . They have what looks to be a correct preset for a stock VFR. According to this chart, the speed would be 154 MPH at the 10,500 RPM horsepower peak. This corresponds nicely with the 150 to 155 MPH top speed generally reported. Taller gearing would just LOWER the available power. To be blunt it looks like Honda got the gearing exactly right for a stock engine. Given the expense of large horsepower gains for this using a supercharger, you best bet is just to trade the VFR for a good used Hayabusa. The VFR is not meant to be a top speed bike, it is a Sport Touring bike with an emphasis IMHO more on Sport than Touring, but you can only pull so much HP from an 781cc engine without killing low RPM performance. My $00.02 -VFRGeek These bikes have v4 800cc engine and over 200HP http://www.highrevs.net/motogp-bikes/suzuki/suzuki-gsv-r-2008.php http://www.highrevs.net/motogp-bikes/ducati/ducati-desmosedici-gp8-specification.php Thats also a race bike thats designed to get one season of riding out of the engine before a rebuild. Its not the fact that Honda couldn't have built the VFR into a 200hp monster, its all about the demographic. Why build their strop touring bike into something faster than their R class Sport bike?

UNI foam FTW