Very first thing is check the centrifugal oil filter on the rhs of the crank, it blocks and starves the cam and head of oil. Secondly check the camchain tensioner as it will allow the chain to slip off the guides if loose and eat its way out of the cam chain tunnel.From my mates cj360 and my brothers cb250 g5
Use decent oil and do changes every 1000 miles max.
Spend a bit off time on the tls front brake, make sure the pivots are free and set up the shoes, if done right the brake is better than the g5, 400/4 swinging caliper design from my cb250 k4