I have an 81 xj 650. My shifting fork is bent which as I understand it means that I have to split the cases. I am not qualified to do this and cant find anyone locally to do it for a decent price. So what I was hoping to do is get another motor and switch it out. Then I could study and some day attempt to fix the current motor. my question is would I be able to switch out my 650 for a 750? I know the carb would need to be from a 750 as well. Iam unsure if I would be able to use current driveshaft and electronics. My frame is hardtailed and I have customized this bike to how I want it. I wouldnt want to start over on a whole new bike if possible. Ideas? Also any one know of any motors for sale in the midwest?