Question about 2005 Yamaha DT 125 X
Not familiar with that bike...is the oil tank higher than the carb? I have seen 2 strokes weep past the injection pump into the carb if the tank was high. a simple fix to that is to get a longer line and put a loop in it. I have also seen vents on the oil tank get clogged with dirt, then expansion of the oil in the tank forces it into the carb...check to make sure the tank is venting. If it is venting...then I would loop the oil feed line,,,don't even really have to loop it...just at some point the line needs to be lower than the carb, how much lower is trial and error, but oil generally doesn't weep upwards very easily.
Posted on Mar 23, 2014
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Posted on Jan 02, 2017
The first thing you need to check is the air filter. Sometimes critters can get into the airbox when a bike sits for awhile. Sounds crazy, but it has happened to me. If nothing is blocking the filter, give it a quick clean since you have it out.
Next things to check:
Improperly adjusted fuel level
Clogged or loose main jet
Faulty fuel pump
You may not be able to check these on your own, but these are the next likely culprits.
Hope this helped
Posted on Mar 11, 2009
I had a similar problem with my TTR 125. I removed the carb, removed the float bowl and gave a a careful clean. I also removed the choke plunger mechanism and gave that a few shots of penetrating lube oil. The choke mechanism works much smoother as a result.
Just those two simple things and my bike fired up right away.
Posted on Mar 30, 2009
Have you checked the ground lead?
Make sure it is clean, it runs down and bolts to the top right hand side of the crank case.
Sometimes what happens is, that lead gets grime on it, oil or corrosion.. and it doesn't make good contact. The lights, spark ETC load the crank case and frame full of DC.. when you shut the bike off the dc cant flow through the starter so it won't turn over.
after a while the dc trickles out it will let the bike start again.
Hope thats it and it works for you, good luck!!
P.S. how is he liking his ace?? Awsome bike, I have had mine since 1999, and it not about to go anywhere!!
Posted on Jun 07, 2009
SOURCE: yamaha dt 125r power valve
Your barrel? LOL. Sounds like the valves need to be gone through. I would suggest taking and valve train apart and put it back together correctly then go from there.
Posted on Aug 08, 2009
try cleaning the carb completely off the bike, make sure you take the jets out and clean them well.
They are probably gummed up....gas does not last long after 30 days anymore before it begins to varnish and clog parts.
Posted on Nov 09, 2009
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