I found a gas leak today and I'm not sure where or why I have it. From my investigations it looks like it is coming from the #3 & 4 carb breather hose. (the hose circled in my pic) Why would gas be coming out of this house?



From the best that I can tell it just started, and the only thing that seams different is it kinda dosen't seam to run right in the 500 to 3k rpm range.

Thanks in advance for the help, thoughts and opinions.

Jeremy

 

well, I just started the bike, and when I did only the header pipes coming off of 1 and 2 got hot. What was the chance that the plugs on 3 and 4 became fouled? The bike was on it's side for a little bit...

 

You know what, I think Im having the same problem as you.

 

ok here is my thinking, correct me if I'm wrong. The gas that is coming out is gas that isn't being burnt. So that means that either the floats are stuck or no spark. No spark would mean either a bad coil or bad (fouled) plugs. I would eliminate the coils because 1 and 4 are on one coil and 2 and 3 are on the other so if I had a dead coil it wouldn't be 3 and 4. So that leaves a stuck float or bad plugs. I hope it's just the plugs because after pulling the carbs on my v4 idk how many times I never want to deal with another carb again lol.

 

Can half a coil go bad? I started the bike this morning and only #3 header didn't get hot. I pulled the plugs from #1 and #3 and switched them, started the bike and #1 got hot but #3 still stayed cold.

 

Check the spark on all cylinders, if you're getting strong spark you have a fuel problem.

It sounds like a float is sticking closed and cutting off fuel to the dead cylinder, and when it is leaking fuel the float is sticking open and flooding the carb which will dump the excess fuel from the overflow tube, or if it is leaking too heavily it may flood the cylinder/foul the plug.

There's a guy on ebay that sells carb rebuild kits for a very reasonable price, Honda wants something in the vicinity of $50 PER CARB for a seal kit which only comes with o-rings (no float needles).

That's $200 ****in bucks for o-rings.

http://cgi.ebay.com/ebaymotors/Honda...Q5fAccessories

 

I didn't pull the plugs again but I did hook the wires to a spare plug I had and all plugs threw a spark. Pulled the carbs, looked at the float on #3 and it wasn't stuck. Tried to start the bike with the carbs off and got a nice little fireball out of #3. Sooo I'm lost.

 

The floats won't be jammed stuck, they will be just barely hanging on... You wouldn't be able to feel that they are sticking.

Try removing the carbs, pull the float bowl covers off and hold the carbs upside down so that the floats are closed.

Now slowly tilt the carbs right side up, and watch the floats "open" (basically flop down).

See if any one takes more of an angle to open than the rest, that may be an indication.

Another test to see if the seal on the float needle is worn is to hold the carb upside down (floats closed) and fill the float chambers with fuel or water (if you use water, blow the carbs out with compressed air after testing).

If any of the levels are going down, the needle is allowing fuel through (leaking).

 

Before I read Hershey's last post I already put the bike back together. When I did, I started it up and no gas came out of the hose. I let the bike warm up to normal temp and still no gas so I guess I fixed that problem. (stuck/sticking float valve) My #3 still is dead though. I was suggested to do a carb sync since I apparently have spark and gas is getting to the bowel.

 

I forgot to mention if you are testing the seal on the needle by filling the float bowl with the carb upside down, that you only put a small amount of fuel or water in the bowl as not to cause the floats to rise, just enough to drown the needle