SOHC.co.uk Forums > CB500/550

Fix that rattling cam chain, be warned

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daz:
Hi all, bike made a funny noise & broke down, had to be recovered home. Got to work on the engine today, found all the exhaust valves have hit the pistons & the static cam chain guide has broken in half.
Found the offer half wrapped around the crank between the cam chain sprocket & hivo sprocket.
Did manage to bash it off, also found 2 oil ways for the camshaft had bits of old o ring in, here are some pics, cheers Darren

daz:
2 small pieces of what look like o ring stuck in the camshaft oil ways.

LesterPiglet:
Damn bad luck. Are the valves damaged?

hairygit:
Sadly, bent valves are almost guaranteed :'(

daz:
Bummer valves are bent, guides look ok, no cracks. :( :'(  I do have 2 spare 500 four heads, can i take the exhaust valves from them? cheers Darren

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