[QUOTE="Lozzo"] Muck says... Go for 110/70-17 front and a 140/70-17 and then choose tyres suitable for the current crop of race rep 400s, something like these perhaps? [URL]http://www.dunloptyres.co.uk/bike/radial/gpr70/index.html[/URL][/QUOTE] I'm running GPR70s on the KR1 and I'm pretty happy with them. Similar weight and size bike to the FZR250. JL