hi, you guys are a lot more knowledgeable on this stuff than the UK guys. i've read a lot on here about bracing the frames on 750s, mainly for racing purposes, but i'm not sure if i need to brace my frame or not. i'm in the process of fitting cbr600f2 front and rear end to my 78 supersport and it's going well so far. i need to weld shock mounts on the swingarm and i'm nearly there. i have no intention of racing but we have some great twisties in my part of the world and i intend to have some fun trying(!) to keep up with R1s, GSXRs etc. it's quite a rare UK only model (google phil read replica) so i havent modified the frame at all. is bracing necessary for fast riding or not?