well another set of fouled plugs! grrrrrr!

 

not backwards, inlet is bottom, vent is on top between 1-2 and 3-4. at least on my 88. Another thing to look at is your float needle and seat. since just one cylinder is filling, should just be a problem in the one carb. I would take it apart again, q-tip the seat, and replace the needle. while it is apart, put the float in a cup of fuel and make sure it doesn't sink. I had a gpz900 with a leaky float. very hard to find.

 

Thanks, I am in France and my bike is back in the states and I can't go out and take a look at it. Most carbs vent from below.

There looks to be three connecting pipes in the carb diagram.
http://www.bikebandit.com/houseofmot.../m2019sch20516

Without being able to lift my tank, what is the third pipe for? Could that be mis-conected?

 

well the bike runs but spits and sputters. missing out with new plugs. pulled #2 plug wire and no change is sound so #2 is not running. i got spark. im out of ideas.

 

#2 jet blocked ??

then compression test ??

 

went through the carb with a fine tooth comb. nothing wrong with it from what i see. i need to find a compression tester so i can do comp. test. maybe a piece of carbon is holding valve open???

 

maybe .......won't know until you test it .......some NAPA stores will loan ya
one, some boat yards will do it for ya too.......boat motors always have comp'
checks done to them......

You say you are getting good strong spark on 2 right ? nothing grounding out ?

I would double check that needle seat on #2 carb again if #2 cyclinder is still filling
up with gas..........reading back through all the previous posts seems most probable
issue to me other than the potential sticky valve

 

Yep, it doesn't seem like it would be a coincidence that #2 is filling with gas when the bikes off, and then not firing when on if there weren't something buggered up with that carb.

 

Last winter I was working on a snowblower and it had a very small piece of thread in the bowl seat(needle). Fuel would flood the carb. It was very hard to find.

 

I had the same problem with my '95 Hurricane. The bike started with full choke, ran for a few seconds, the died.

Check the manifold vacuum plug under the carbies. Sometimes the plug pops off when the bike back fires. If it comes off, too much air is being sucked in.