I just picked up an '86 R and the kick start slips when i try to turn the engine over. As I have not opened up the case yet, I can only assume that the gears need to be replaced. Any parts that might aid in this repair would be most helpful. Seeming this is my first R, I don't have any special tools if they are needed. Those would also be helpful ; ) Please, no offers for galvanized muffler bearings...