Need some help.. getting frustrated

[Guest]

A few days ago I noticed fuel leaking from my carbs. I've read through all of the threads on this website (including most of the info on BikeCliff's website) to try and figure out what the problem is but I'm just having no luck.

Symptoms:
- Fuel flows from middle two carbs when bike is running
- I can't see exactly where the fuel is leaking from but it is NOT from the overflow nozzles
- Bike runs great
- If I take the tank off and run the bike on the gas left in the tube - no leaking

I've pulled the carbs off and inspected the bowl seals, needle, float bowls (needles and bowls do not seem to be sticking and no holes or wear detected). I've been careful to put everything back together correctly. Petcock seems to be working fine (I guess - doesn't flow fuel while 'on' or in 'res' but does on 'prm'). I've checked the float bowl height, 22.4mm.

How often do the fuel transfer tubes (between carbs) go bad? I just can't think of anything else it could be.

If anyone has any ideas I would really appreciate it.

Thanks

P.S. Carbs are Mikuni BS 34SS

[Phred]

Had the same problem with one carb. It turned out to be the seal in the choke in carb #3. Check to see if there is any fuel leaching out of the choke in the carbs. It is not a lot but a little difficult to spot at first as it is not obvious.

[Codeman]

YES! I was right.

Both sides.. crazy

[Big T]

You've just discovered why all the tutorials say buy a set of O rings for your carbs

The material just doesn't hold up for 30 years

[steve murdoch]

Changing the o-rings is the easy part.

http://www.cycleorings.com/

[Cyrano]

Well done on finding the problem.

The material just doesn't hold up for 30 years

They don't make 'em like they used to! Take 'em back to Suzuki and get replacements under warranty.