87 lt300e
 

was riding and it just quit turns over but that is it at first thought it was coil so i changed coil have blue spark had just put in gas thought maybe gas was bad drained old gas put in new still same thing just turns over found out it has fuel pump took hose to carb off cranked it over gas spurted out next took off carb and took it apart no gunk it was clean sprayed staring fluid it air filter nothing just turns over any ideas??? also the vacum hose off the carb should i be able to blow through it cause i cant it runs back to the fuel tank i think

87 lt300e
 

yep, i had the same bike i loved it but i didnt love that damn vacuum pump...there trash...lol, pull it off and take it apart and clean it, pay close attention to the flow arrows so you dont put it on backwards and pay attention to the diaphram when u clean dont get it soaked in carb cleaner...but after you clean it Real good get every spec of dirt off that hunk of junk then put it back in the correct direction in between your fuel hoses and it should work i had to do it every once in a while...the damn thing got dirty out of nowhere sometimes and i had to farking pull it out(which is a bitch cause of the plastic) and clean it then it wud run perfect. it is also a good idea to run a inline filter on it...hope this helps

87 lt300e
 

thanks i'll try that