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bozi

wr 400 idle wont adjust down

7 posts in this topic

i have a wr 400 1999 that i have recentley rebuilt with new piston and valves, it has a dep 7 exhaust on it that is the only mod on it. The problem i am having is that i can start it without any choke on and no matter what i do with the fuel screw it makes no difference to the idle ihave gone from a stock 45 pilotjet to a 48 no change and to a 42 and 40 still no change i have sprayed wd 40 all over to check for air leaks but no joy in finding one . I have stripped the carb and checked the slide plate no cracks in it. the header pipe glows red as its revving high about 3000 to 4000 revs the only way i can slow it down is to pull the choke out half way and the header stops glowing but if i pull it right out it revs and if it goes all the way in it revs any he would be a great help

 

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I will disconnect it tomorrow and try it with out any on

 

Uh, that is not going to work. Won't change anything.

You have to service the components on the carb.

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