hi everyone,on the way to work 2day,started her up,warmed up a while,drove off and after about 400 yards,the throttle stuck open,few seconds later shes ok,then got another 400yds and she felt as if runnin out a juice(tank was full),started her again but she will only very badly and low rpm,then cuts out,kick again,starts allways first or second kick but wont accept gas and allways stops after about 15 seconds,she wont tick over on own,ya have to "feather" the throttle back and forth a bit,i have noticed the last couple a weeks that shee started to backfire once or twice sometimes,now would i be right in thinkink the mains/pilot jets are dirty?(plugs are 4 days old.)ill take em out tomorrow and av a looksee,has anyone got any other advice or tips? seeya.