Advice needed on cam chain

[Lawrence]

If the bike has done 38k would you reset the tensioner or do the cam chain ?

t doing the cam chains seems more than a little risky as wouldn't it practically destroy the engine if it failed ?

this a better safe than sorry deal ?

Mine was rattling at about 30k.  I reset the tensioner but it had no effect, after a few more miles (no idea how many, up to 1000) it stopped on it's own.  I guess I could've just wedged something down the tensioner before screwing the spring back in and popped it out another notch but I didn't fancy doing that.