101r 125cc no power past half throttle

[Anders]

Hi,

My 101r 125cc wont run past half throttle, so i took the carby diaphragm out but
could not see any holes or cracks, so put it back and the bike was
fine for about a month. Took it out again and reinstalled it bike was
fine again. Is this pointing to a faulty diaphragm or could the
problem be elsewhere? I'm not sure why the problem would clear itself
by reinstalling the diaphragm if the diaphragm is faulty?

Thanks

[harry]

well when you remove the  diaphragm
 you are also removing the needle right?
so i'd look at some kind of build up  ,dirty jets

 oilyhans
 

[Anders]

well when you remove the  diaphragm
 you are also removing the needle right?
so i'd look at some kind of build up  ,dirty jets

 oilyhans

Good point. I took the air cleaner hose of the carb and had a look at the slide while reving the motor and the slide didn't move. Pulled the diaphragm out and it seemed to have a small amount of some kind of build up on it so i cleaned it up so that it moves freely. It seems ok, see how it goes over the next few days.