SOHC.co.uk Forums > CB500/550

Timing of cam chain correct? (solved)

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deltarider:
Maybe you don't need it, but others may have a look at this video shot by René van Maanen of Honda4.nl. It gives an idea how the tensioner works and why it is, you will not see the bolt turn, when you loosen the locknut to let it adjust; it will move just a fraction.
Mind you, the vid does NOT show how to do the adjustment, it only demonstrates what goes on. To adjust, either do it by the book or like Bryan has posted before. I do NOT recommend adjusting with a running engine like Honda's Owner's Manual CB500K3-CB550K3 suggests.
https://www.youtube.com/watch?v=8qJc6e5pa8M
Courtesy Renë van Maanen - Honda4.nl

Trigger:

--- Quote from: CB-500 on April 06, 2022, 11:40:13 AM ---The tensioner mechanism looks good and turns freely and spring adjusts on the bench the same as when it is installed in the engine. The problem only occurs once the chain is fitted to the cam sprocket and camshaft, My worry is if the new cam chain is too short making it too tight

--- End quote ---

A new chain is tight, if it was one link too short you would never get it on. Come to think of it, i had a new cam chain out of the box once which was a 88 link box but, i did get it on but it turned out to be a 86 link.
Is your front cam blade in the correct way. The can should be between the blade and the inside of the barrels .

CB-500:
Tensioner blade, guide and chain all fitted and routed as per the manual. Just spoken to Honda- classics (always helpful) they advised that with new components fitted (chain and blade) that the tensioner usually ends up in the tightest state (backed off) adjustment of the tensioner is just designed to allow for wear in the chain, blade and guide. Will be checking tensioner adjustment again after 500 miles.
Thanks for everyone’s help

deltarider:
I don't have much of an opinion on the design of the CB500/550 tensioner, but the quality they came in, is outright flimsy. It's the part I hate most. Have a look at the pic in reply #8 and you'll understand how little it takes to derail things. Hopefully an aftermarket one is better.

Seabeowner:
The gearing to the screw head (that you must not turn) is very coarse so the entire rotation of the screw between fully retracted and extended to the point your chain is knackered is probably only about 60 deg CCW.  1/6 of a turn.

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