Question about 2003 Yamaha DT 125 R
Carburetor overflow leaking @
Hi, Garydunning and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. A worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
8. Damaged petcock diaphragm allowing fuel to flow through the vacuum line into the combustion chamber.
9. Contaminated fuel tank.
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carb overflow hose petrol shooting out
Carburetor Carb Leaking Gas How to Fix Repair it Motorcycle Honda DIY...
YAMAHA DT125R Owner Manual
Posted on Jul 12, 2019
Ajust floot level
Posted on Jul 12, 2019
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Posted on Jan 02, 2017
it's the float valves either worn got muck in them, most common after bike been laid up for a while, old petrol goes 'gummy' rarely it can be a hold float, so it won't float any more, most unlikely with two gone. if carbs still on bike, hit them with a piece of wood with a hammer, a few moderate taps, that way might free the floats and not damage carbs. failing that it's a strip and clean. if grit and muck in float bowls then drain and clean fuel tank or more **** will just get in.
Posted on Aug 16, 2009
check for a bad float. a float with a hole in it will 'sink' and thus, not turn the gas supply off when required.
Let me know what you find.
Posted on Sep 22, 2009
It sounds like one of your floats is not functioning properly and may be stuck,have a hole in it,or perhaps the float drop is too large allowing more fuel than needed to come through the system. Regardless you are not going to like this answer.They will have to come off and be checked and cleaned again. I've done a set of carbs as many as three times to get them right so I feel your frustration. Bottem line is they are frustrating,annoying,and fiddly,and they are either right or have to be done again. Compressed air is handy to help you blow out the tiny grot,and so is a set of needles to clean the emulsion tubes (if equipped). Good luck and be patient!
Posted on Dec 29, 2010
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