my wifes atv is a 91 quad runner 250, and inpressive lil machine until now. the problem i am having is with carb. the top rivet on the diaphram was loose and sucking in air and debis, i fixed that and tore down carb and cleaned it all out good. up until that point it always started with out any problem, just didnt run well hot, or in wet conditons. well now it is a SOB to start, only way to get it to kick is to pull and pop into gear, elec. and pull do not want to kick it over enough to start. OK, once i have it running it runs fine "until" it get warm, then idle changes and goes from high....to high, to low and smooth.. great, sounds good, but once in gear, it is to low and stalls out. i have spoken with dealers about the air mix screw and such (which u cant get to while carb is on machine) and have it turned out 2 1/4 turns.
i have tried adjusting idle speed, but like i said, there seems to be no happy medium. eithe to high, and it "clunks" in gear, or it drops to low and it just plain stalls everytime u take thumb off throttle.. this is my wifes machine, so trying to tell her to just keep idel speed up does work lol.
anyone know of something i am over looking? it started fine and ran fine until i cleaned the debis out of top of diaphram, which is fine, no holes .
thanks for any input.