hey man welcome to the forum! well my Rm 250 does the opposite of yours, when its cold it does that, but mine is supposed to do it when its cold....as for your bike im not sure...i dont really think it would be the carb...here is something you can try...after its warmed up, leave the choke on and see if it still does it...sorry i couldnt be much help to ya...DR125 said: