throttle sticking

yamaha blaster

New Member
Jun 15, 2008
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Michigan
So I am working on my buddies yz 125 identical to mine anyways his throttle is sticking open after you let off the throttle. What could be the cause of this?
 
bad springs (not pushing the slide down)
the cable is sticking (not allowed cable to slide back)
the slide is sticking (slide is hitting something in carb)
 
in any case remove air box/filter and have a look with engine not running to see where its sticking, usually its the little piston/slide inside the carb, spray in some carb cleaner free it up and just keep opening and closing it. it usually happens if the bike has been sitting for a while and you open the throttle it will stick and give you a serious fright when you go to start it.