hi all my klf 300 was lacking power top end. i have stripped down the top end (head) and found that the timing was out by a 1 tooth. i have inspected the valves removed and re-lapped them. All seemed ok. i then re-fitted the head, re-timed back up and released the chain tensioner. Instead of turning it over by hand with the bolt loose i decided to start the engine straight away as i thought they were automatic tensioner. it ran great for 5 mins with plenty of power etc but then started to miss and lack of power top end. i suspect that the timing has jumped again but ran out of time to re-check. The question i need to ask is should i have left the top 10 mm bolt out of the tensioner and turned it over by hand a few times or was i ok just to release the tensioner and put the securing bolt back in straight away like i did and start it. The reason why i asked is do i just re-time the engine and turn it over by hand and chance valve damage again or do i start all over again and strip it down??? . ps the locking pin on the cam sprocket looked ok and didnt seem worn down etc

 

I always turn the motor by hand first to avoid valve to piston contact just in case.
Did the tensioner automatically extend out though?
With the tension fully extended, how does the tension in the chain feel?