New project! Never built one before. I have a rolling chassy and the engine with wiring harness and radiator muffler system. Show me your builds would like to get some ideas for putting the 600cc gsxr motor on the kart.
Only issue I've seen in M/C engines being used is figuring out shift linkage if you have rear suspension, other than that, post some pictures of what you have to work with so we can rule out issues and try to give pointers.