SOHC.co.uk Forums > CB500/550
Timing of cam chain correct? (solved)
Bryanj:
Ive fixed a few but never damaged one, i found the 3,000 mile service ok if you made surr the front run was tight so all the slack in rear and that was advised by the UK travelling Honda techs, we didnt get annual training
deltarider:
IMO the design is too close to the racers our models derived from. The CB350F tensioner was even worse. Before models came to the market, they were thoroughly tested ofcourse. But what Honda never was able to test is, how things would be after six months of inactivity. If you try to adjust a CB350F tensioner, after six months of hibernating, well, good luck!
The method you was told, was also the instruction Dutch mecs received from Honda The Netherlands. The public was never informed though. That method is good, be it that the mec I've learned it from, always asked a collegue to assist for a second. Amateurs like myself I'd advice to do it with plugs removed, for a good feel, because the compression could fool you. Or do it as described in the CB650 manual, turning the crank extremely slowly, so you are sure.
peterengland:
Why are you not supposed to turn the engine with the big nut at the points? I know it's been mentioned before but can't find anything relating as to why not.
deltarider:
Peter, I've been using that nut to turn the crank for the last 42 years. What you refer to is the usual mass hysteria in the international forum, once one high in the pecking order has warned against it. That will be echoed by the others. Ofcourse you can do it wrongly, but if you use a T-handle like shown below, you can even do it when the engine is red hot.
Bryanj:
The reason why is that with plugs in you can easily break the "ears" off the cam and elongated the hole the locating pin fits in. I have seen both but never done it myself.
With no compression (plugs out) it ought to be safe to use BUT putting that caveat in an explanation people either dont read, dont understand or dont care.
How many owners of cars with broken cam belts have ignored the OR FIVE YEARS bit
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