head swap, timing problems
 

Hey guys,
so i had a tensioner fail on the front cylinder, i have replaced the head and done the timing per the service manual, but i still feel like im getting alot of cam/valve noise in the front cylinder. i have changed over to the manual cam chain tensioners and seem to almost be out of adjustment with the front again. so i think its time to replace my cam chain and my cam sliders.

is there something else i should be looking for?
are all chains the same such as a 152t is the same as any 152 tooth cam chain?
anyone have a really good explanation video for the proper timing? (make sure i dont have something out of timing)
is the cam chain something i can replace on bike or should i pull the motor?

Thanks in advance, all the help is much appreciated!
Blurkx