Runs great for awhile, then starts to sputter

[rideyamaha09]

My blaster will run great for 2 or 3 hours, then begin to sputter and gradually just get worse and worse. Once i take the carburetor off and check the floats and jets for dirt, then put it back on it runs good again for another few hours and starts over. I have no idea what would be causing it to run fine then after a while start to act up. Any ideas?

 

[6speedbluejet]

same has happin to me last week i was going to start a new thread and forgot to Iv done pretty much the same clean out everything with a tooth brush but still has the same sh*t after 3 hrs starts to act up and run like sh*t

 

[xmous3yx]

wat kinda oil u guys using? try running half race fuel and see if that helps clear it up

 

[rideyamaha09]

im using kawichem 2 stroke mix oil, what race oil would you suggest?