Problems with number 3

Hello everyone, i´m having problems with the spark plug in cylinder 3, it get wet with gas overnight, for i have to remobed and get it dry, what could it be??????
Thanks.

 

Stuck needle valve/float in the carb for that cylinder, allowing gas to flow. Also, your petcock (fuel valve) is either faulty or left in "Pri" position, allowing fuel to flow when it should not.

 

Yep what Willie said. Your petcock is the valve that supplies the gas. If it is leaking gas into your crankcase, and the petcock is NOT in prime, than your petcock is leaking. A lot of members just buy another fuel shut off valve and install it on the hose after the petcock. You just have to remember to turn it off after you are done. Bigfitz also has a tutorial on how to rebuild petcocks. Some members say these things are irreparable, and buying a new one is the best option. I following Fitz's tutorial and it worked great for me.

That is one of your problems, the more serious problem is also what Willie said. The carbs are getting stuck open in the float system and allowing gas to constantly dump in the the carb bowls, which than overflow into your airbox, than goes down the hose into your crankcase. If your bike has been sitting, some people suggest using Seafoam for getting things unstuck. Worse case scenario, the carbs will need rebuilt and cleaned. I would suggest the shut off valve and the Seafoam or some kind of carb cleaner in the gas to see if you can get it fixed without having to do a carb overhaul.

 

Ah, since your carbs sit forward in position to the motor, overflow gas goes into the cylinders, but gas can also go into the crankcase so be sure to check your oil!

 

I have no problems with the oil and the petcock is working just fine, it cut the fuel flow wen the engine is not running

 

Did you leave the petcock on prime?

It might be worthwhile to leave the petcock on one night, stick a hose onto it and run the hose into a bottle. Sometimes it is hard to see if it is really leaking or not. If your getting gas in your cylinders, the first problem in the line of problems is the petcock (though it may not be the most important).

So I would suggest leaving it on "on" one night, and "reserve" the next.

 

I think that i have to do everything that I can, so I will do it tonigth, but I´m almost sure that the petcock is not the problem.

 

What cylinder is the vacuum line for the petcock hooked up to?

Rare, but I've had a diaphram leak through and into the vac line. Seems like you would have a leak going to the carbs as well though.

 

from 1 and 4

 

No leak at all from the petcock, so it´s must be something in the carbs.

 

Igor, you more than likely have a float that's not shutting off properly for whatever reason, and allowing some fuel (what's left in the lines) past into the cylinder. It may be out of adjustment or it may have picked up a piece of debris.

You need to pull the rack off, and use the "clear tube" method to check your float levels; the method is described in more than one post on this forum.

In the process of checking float levels, if you do have one float that isn't shutting off, you will discover it.

 

Thanks I´ll do what you just said