So the bike seems to have a leaky petcock, I am getting a new one, and if i switch to reserve gas it seems to pour out the overflow, Any way the bike stinks of gas and hoping i don't catch fire, what to do with the overflow?
The bike seems to run ok, I seem to be replacing parts on this new to me bike once a week. when riding it seems ok gas is going where is should but sitting over night it leaks with gas off or on.
two wheels for life!
"It's more fun going fast on a slow bike than going slow on a fast bike" UK
1994 TW200, 2009 F800GS loaded,
Remove the fuel line from the carb and with the petcock off, see if any gas comes out of the line.
If no gas comes out, the petcock is OK.
The leak then is from a stuck float, or crud holding open the float valve.
the o-ring on the float valve is bad, and fuel is leaking around the float valve even when it is closed.
If that's the problem, you will need to remove the float:
2018 Triumph Street Twin..............2016 CB500F
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I've had petcocks leak on me on nearly every bike I have owned. I usually spray them with silicone spray which penetrates past the metal parts down into the rubber gasket that seals things from leaking fuel and helps soften it up a bit. That's how I 'maintain' this gasket. Sometimes if they leak, they leak and the only fix is to replace the gasket.
New petcocks are cheap for this bike though, so I'd happily pay the 17.50 for a new one. (OEM, not generic.)
What is probably going on here is that the rubber gasket that looks like a smiley face which lives behing the ON OFF RESERVE lever has microscopic cracks in it due to age OR it has deformations in the rubber because your petcock sat, unused, in either the ON or OFF position for several years when the previous owner did not ride it. I have had to replace these smiley face gasket in a lot of motorcycles. They're referred to as 'whizzer gaskets' and they go bad with age OR if people use gasoline with ethanol fuel in it. Ethanol fuel can ruin gaskets like this in a short amount of time.
My vote is to just purchase a new petcock or purchase the rubber gasket itself.
The yamaha dealer will ding you for $6.50
That is the part number for a 2010 bike.
3AC-24523-00-00 (replaces 3AJ-24523-00-00)
^this is for a 1995 bike. So it looks like the valve is universal to all TW200 petcocks.
the bike is a 1990 so it is a bit old and things have been happening with it,eg bad riding skills =crashing, and the stator dies, now gas leaking, it will be a new bike by the time I am done!! I will check about the float valve
Thanks for the help every one!
two wheels for life!
After coming back from my first offroad trip on the tdub, smelled petrol, and also found my carb to be dripping.
I am quite keen to pull the carb of and give it an overhaul. So now it seems I have an excuse.
I know there is a good tutorial on the forum which I will go through. I would also like to replace the missing run off pipe. Can anyone post a pic of what it's supposed to look like, and what size/length it is?
Any other advice before getting my hands dirty with this?
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