Skip to the number one for the main reason I posted

Hi I have a friend that asked me to fix his bike for him. He just broke the drive shaft and must have cracked a case when it flew off, so I’m repairing that.

1. So the real reason I’m here is my buddy was also wondering if I could rebuild the top end, BUT he want me to put a 700 piston and jug. I’m yet to look at the bike nor have I worked on a Rubicon for a few years so I have not a clue if it’s even possible. Thank you so much for your help ahead of time.!