Hi after doing a lot of work on my bike today I now have a new problem where fuel is coming out of the carbs overflow. To help figure out the problem here's a list of things I did: New carb boots Balanced carbs Put in smaller main jets Changed pilot jets Could any of that cause this??? Or is it a result if something else.
The problem will be with your needle valves. May have knocked some trash into it, or it may be stuck. Try tapping it with a hammer, if no luck give it a cleaning.
So needle valve/needle and float is the only cause of this? I'll pull it apart and try fix it tomorrow.
If the float bowls aren't being oversupplied with fuel then it can't come out the overflow. Be careful you can hydro lock your motor and bend valves when you try to start it.
Allright, you cannot get too much fuel into your carbs (to come out the overflow) if as the float rises the needle lowers and seals in the seat. Now if you add a leaking petcock into the equation with a stuck open needle your cylinder will fill with fuel to the point that when you start the engine the piston can't move. This can result in bent valves and an expensive repair. This is called hydrolock
But going back a step. At this point I should see which over flow is leaking the fuel, open up those two carbs and inspect the float and needle valve? Is that right?
I am currently dealing with this very issue on my ZZR600. The tips on the float needles have seen better days and are sort of disintegrating. Also you can get junk in the seat which will cause the float needle to not sit properly and cause flooding. Keep us posted on your progress.
The seats are non-replaceable on these carbs, even with fresh needles my #3 was still pissing gas. A q-tip mounted to a drill with a little bit of polishing compound was able to clean up the seat enough to allow the valve to seal. I'd also bench test the carbs before putting them back on the bike.
Might be right, I thought it was valves but thinking harder about it Conrods makes more sense. Probably mixing up timing chain snapping
False alarm, the petrol was actually leaking from the fuel hose where it meets the carbies. Finally some good luck my way. Just snipped the hose a little shorter and put it back on and we are all good.
