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vfr 400 nc30 stuttering / missing
Posted: Sun Oct 18, 2015 11:39 am
by tigerclaw
Hi. My bike has been standing for 2 months. I started it and rode it. It was missing a bit then cleared. Then I started it the other day and now it's missing the whole time. You don't hear it much at idle but from about 5000 all the way to the top it sounds like it's only on three cylinders. I took the cars off and removed the jets which all seem to be clear. I did find a burnt electrical connector on a yellow wire on the right side that runs into the harness. I fixed that but the bike is still not right. Now I'm checking spark plugs and if there is spark on all 4 cylinders... Any suggestion. .. Please :)
Re: vfr 400 nc30 stuttering / missing
Posted: Sun Oct 18, 2015 12:18 pm
by tigerclaw
Seems I've found a dead plug. Odd thing is the powdercoating on the head is pock marked like it has seen some electric action
Re: vfr 400 nc30 stuttering / missing
Posted: Sun Oct 18, 2015 12:35 pm
by magg
Measure the battery voltage as you rev the engine from idle to more than 5000 rpm.
Re: vfr 400 nc30 stuttering / missing
Posted: Sun Oct 18, 2015 1:12 pm
by tigerclaw
It climbs and holds at 14.5v
Re: vfr 400 nc30 stuttering / missing
Posted: Sun Oct 18, 2015 9:01 pm
by richyrd5
dodgy lead?
Re: vfr 400 nc30 stuttering / missing
Posted: Tue Oct 20, 2015 6:34 am
by tigerclaw
Yup. It seems in the end it was a dead plug. I've never had that happen before. Would have saved a lot of time if I'd looked at the plug before stripping the carbs