it's perfectly normal for reverse to go out on the ninjas. That usually happens during setup and delivery on the bike, so by the time you get the bike, reverse is all ready burnt out. It has to do with the flux capacitor. The flux capacitor only allows a one way time continuam warp, resulting in extremely hi amperage consumption, and as a safety precaution, the ECU shuts down the Flux capacitor to prevent amperage overdraw dielectric conclusion damage to the reverse stator system which in turns fries the reverse gear in the master cylinder. It all coms down to ohms law... PIE=centigrade sqaured to the n-25.6 , in basic terms, it's normal. LOL