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Built_300EX
03-22-2010, 12:55 PM
Ok, i've got many other posts on the 400ex page, however no one is giving enough information to be really helpful so ill try it here.

400ex, 185 main Keihin, 38 pilot.

t4 pro circuit full exhaust, K&N filter with K&N cover, port/polished, bore size I dont know and the cam I haven't looked at either.

For some reason my quad runs great, instant throttle but its still getting gas in the bottom end. Can someone give me some help please?

I've checked around, heard about an oring gasket in the carb that can allow it to do that but if its getting extra gas wouldnt that cause it to bog off? This quad hits and hits fast, runs great, doesnt fall off from how i've got to ride it. Anyway, get back to me soon please. Thanks

pontiacgtp97
03-22-2010, 12:59 PM
Rings

mikecancu812
03-28-2010, 10:04 AM
floats in carburator stickin open

Built_300EX
03-28-2010, 11:40 PM
It was 64 something for the new needle valve assembly. The float wasnt sticking, nor are the rings bad.

Got a new carb because 64 and 100 isnt far from each other and I just decided, no labor, buy the carb, throw in the jetting and im done. Did that, runs great. Thanks for everyones help.