SOHC.co.uk Forums > CB350/400

Pots 1&4 Intermitant Spark

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Lynx:
Lester you are right. I was thinking I had swapped over everything ignition. Actally I have not swapped over the contact breakers ::)! They are pattern parts. Diachi or what ever it is. I though that was a good make. Anyway I'll try some replacements tonight. I think I have some old genuines breakers and condensers still. Hope regenerated ;D!

I've entered the bike in my local vintage show 17-18th May. The organisers insist of all vehicles being road legal. So I need to get it on the road by then.

Lynx:
She runs again :)! The reason there was a problem with the ignition on pots 1&4 was the condenser on the breakers for pots 2&3 was faulty, obviously. There is something very strange going on with my bike. I can set up the ignition timing statically fine. Contact made on the left set of points on the F mark for 1-4, contact made on the right set of points on the F mark for 2-3. And the bike runs fine. Now if I check it with the engine running and a strobe light, the left points are controlling the ignition for 2&3 and the right set control 1&4. Sound like I have the yellow and blue leads the wrong way round. But if I swap them over, the bike will not run, just backfires occasionally. So the ignition timing is obviously way out.

What is going on? :-\

LesterPiglet:
You need to reverse the yellow/blue wires and also the HT leads. 2/3 to 1/4 and vice versa.

Lynx:
Well I thought I had :-[. Lester your a star. Sorted. Thanks. Shame the HT leads are cut to match the wrong cylinders.

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