SOHC.co.uk Forums > CB500/550

500 on 2 cyls

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mickwinf:
hi everyone, i tried to start the 500/4 today after a few months in storage but it was very reluctant to fire up and needed a squirt of carb cleaner. But only fired on cyls 1/4 so i replaced points and checked timing, but still no spark.have checked wiring but now suspect the coil, can they just stop working?

hairygit:
It's not unknown, but rare. Have you tried running a new/temp bit of wire from the negative side of the coil to the points/condenser, also a temp live to the positive side?

Bryanj:
Check the connections in the rubber boot by the rear brake

mickwinf:
have checked connections and all good, i am getting a 12v at points but no ht spark

K2-K6:
Check the countinuity through the points to makes sure they are not permanantly earthed, and so give now switching to the coils.

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