I am converting a 1996 CR125 to a CR250 and need some help with a few items. I already have another frame (95) and a 95 engine, my questions are: What is the differences between the 125 carb and the 250 carb? Would rejetting the 125 carb work on the 250 engine? Will the 125 radiators cool the 250? Will the 125 ignition work on the 250? Thanks for any help.