SOHC.co.uk Forums > CB500/550

locked up 550

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mickwinf:
i have just fitted exhaust and carbs to the 550 i am rebuilding but when i tried to turn the engine on the kickstart
 it locked up solid. bummer.it feels like a valve hitting a piston, it will turn backwards and forwards a certain amount but wont go any further.The thing is it was running ok before, and i have not stripped the engine except the outer covers. i have removed the rocker top but it still locks. all the valves seem to be closed and plugs removed so i don't think it is valve timing.Any ideas anyone?

SteveD CB500K0:
If all you did was remove the outer covers, then you must have put them back wrong.

Take them off again and turn the engine via a socket on the end of the crank.

Then put bits back on until you find the place where it stops...

mickwinf:
took your advice Steve, it came loose when i took the alternator cover off but still dont know why, there are no loose bolts or anything to get jammed.Strange!

Bryanj:
If you removed the screws holding th ecoils they can move and jam on the rotor OR one or more of the locating dowels for the cover are missing

mickwinf:
thanks Bryan will check

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