Right cylinder missfires

Ivan Mihajlovski

XS400 Member
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Macedonia
Hello,
In the last two short trips I've had a problem with missfire on my right cylinder. The bike starts but has problems for about 15 secs. I can't figure out is it better with full choke or half on hot weather. Anyways, i drive it in half choke for some time so it warms up nicely. After it is warm, I press the choke to off position. The problem is, when I stop. The bike idles at 1200rpm, then after 5-6 sec it starts to lower the rpm and dies. And when I start it again, the right cylinder starts missfiring and the bike dies in 2 secs when idling. What could be the problem. Maybe carbs are not synchronized? Last time they got checked is about an year ago. Also I have changed the fuel injection a little. Or maybe could it be the spark plugs, they are really old but I've had no problem with them for a year.
If anyone knows what could be the problem, please tell me Your opinion on this problem. Thank You.
 
Sounds like an air leak in the intake boots or carb sync nipples. Remember there are no chokes valves in CV carbs only an enrichment jet not a choke.
 
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