2007 650 brute force4x4.sat for about 4 months without cranking,now it backfires,wont idle,spits and spudders,tried to clean carbs good,there is flow thru the carbs,i pulled the carb drain screw and gas runs out.i have the idle screw turned all the way up and will only rev high with choke on.turn choke off and bike dies,unless you hold the throttle on guarter of the waY open,rev it up and it backfires and sputters.
Hi,might be able to help,it sounds to me like you have a blocked low speed or (pilot jet)this normally occurs when a bike has been left sitting for a while,what happens is that the fuel will evaporate in the carb leaving behind a deposit which will easily block a jet,you will need to remove the carbs from the bike,remove the bowls,inside you will find the brass jets,very carefully remove them and clean them using a carb cleaner spray can and also clean through the holes that the jets came from,clean the whole assembly thouroughly,when you put the jets back in DONT over tighten them ,they are very easily broken,hope this helps...cheers
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