Thanks Chris, I haven't run it yet but it is a new and mighty 6.5hp clone engine. Hopefully I will get time to fire it up over the weekend and try a test drive. If not it will be at Whilton mill, virus allowing. The 6.5hp engine will get a little tuning later if it turns out to be ok and the plan is to run that with the other cyclekarters. I have an old gx390 engine that I shall build into a nitromethane/methanol screamer to see how fast I can get the cyclekart.