Hi does any one know when to re build the engines on a rev 3 as a mine sounds abit rough when kicking over with no plug well slowly if ur check the spark and sounds like my mains are abit rough . And was wo during where to find torque settings for casing and head nuts chears

If it runs ok with no rattles or nasty noises then don't worry.

you say it feels rough when slowly kicking over with no plug in.

It might be worth taking the flywheel cover off as it could be full of dried up mud and junk rubbing on the outer casing.

While it's off grab the flywheel and see if you can feel any up and down movement.