Topic: Cam chain tensioner again

[GeoffT]

OK tried to adjust the cam chain on my 77 550. No1 15 degrees ATDC loosened lock nut but adjuster screw won't move. Springs back into position. Is that what is meant to happen or is it just stuck? Tried tapping it gently but no difference. Obviously don't want to apply much pressure in case I do some damage.

Thanks in advance for your help guys.

[bryanj]

you dont put ANY pressure on a 500/550. The locknut is just that, tensioner is automatic and if it dont work either its toast or the chain is worn out

[GeoffT]

Thanks Bryan,  I did half wonder but I think I was misreading the instructions.    I've yet to start up the engine but hopefully it will sound better when I do.

[bryanj]

What you can do is loosen the nut and then put pressure on the crank so its just about to turn, either with the kickstart OR with a big spanner on the big nut on the auto advance so that all the camchain "slack" is at the back and then, whilst holding the pressure get your mechanically trained spider to tighten the locknut. Been doin that on ALL OHC hondas for 30 years and as long as the tensioner moves and the chain aint worn out its guaranteed to work

[SteveD CB500F]

When I saw Geoff's post I immediately looked in the FAQ as I'm sure this has come up before - in fact I'm sure it was either "BryanJ's patent method for tensioning camchains...  or Hondaman's.

Save you some typing next time Bryan!

[GeoffT]

Thanks again guys. I did look in Faq's as well but missed this paricular gem.

Bryan, your method sounds so simple, did not get a chance to get at the bike yesterday so I'm going to try your method this morning. Thanks again.

[bryanj]

Yeh I know Steve but the dearly beloved tells me I've gone senile anyway---I think its when there is no money left and I just Dont Remember spending that much!!!!!