SOHC.co.uk Forums > CB350/400

400 four wont start

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K2-K6:
It's possible that you've got the points connected to the wrong coil (or in some configuration to do that) the system will spark like this as all the switching elements are working, but with 1+4 & 2+3 cylinders sparking at the bottom of the stroke rather than top.

It's easy to do this inadvertently, also easy to try swapping over by switching the points to coils plugs on the loom over to give opposed arrangement. Safe to try just swapping these two to try starting it.

Reality check (others have fallen into this trap before) one coil supplies the outer two cylinder 1+4 with the other coil for inner two 2+3, checking to make sure you're all good there too.

McCabe-Thiele (Ted):
Your coil wiring should be as follows.

The wire colour to the left hand CB points is   Blue  -  coil for 1 & 4 is the Blue wire at the coil end.

 The wire colour to the right hand CB points it's Yellow - coil for 2 & 3 is the Yellow wire at the coil end.

Oddjob:
Does it start using the kickstart, if it does then it's most likely a starter motor problem or solenoid.

McCabe-Thiele (Ted):
Make sure you have fitted the points connections, insulators & capacitors correctly?

ka-ja:
If you have stripped the advance/retard unit, have you got the cam on wrong? ie 180 degrees out.

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