Evening all, sorry its been a while getting back with a reply, thanks for all the advice.A old mate who is a restoration mechanic came to give me a hand with it .Last year it started running poorly so decided to take it to a reputable workshop who rejetted and set it up the carbs but still not spot ...

Thanks for the advice , just to add some more info , tried removing lead and it did arc out etc but nothing changed . the bike is always stored on paddock stand and i run it to empty carbs while stored .Checked carb manifold clamps are right and tight .tonight started it up again only on 3 no1 not g...

Does anyone else have the problem of starting on 3 cylinders and it’s always number 1 cylinder that fails. I have run it a while, then swap 1 & 4 plugs and it fires okay. It’s had the carbs set up and balanced, new jets, new Dyna S coils and spark plugs. When used regular in warm weather it’s no...

thanks everyone ,its given me a few more things to try. I think i'll look at the engine department first as its not been checked,compression, valves, etc,& get coils checked. cheers lads

hello, first time i've used the forum but i'm really lost. short history of my problem.Bought 1976 z900 A4 been stood for 11yrs .Got it going eventually but couldn't get it running nice ,rich&sooty missing on various cyl . Rebuilt whole bike etc. keystercarb set,dyna s ign ultra-sonic carbs, but...