hi i have a 1987 250x and i need to replace my cam i got the top end off and everything, i can see the cam, i just dont know how to get the cam chain loosend so i can take the cam off ive been seaching around and i hear something about a cam chain tensioner but i have no idea where this is, i also have my clutch cover off and can see the bottom of the cam chain. any help on this would be great thanks in advance!@!!!