Problems overheating and then not starting

[Frostbite]

Hi im new to 2 strokes im looking at buying a friends blaster. Its in very nice shape. Its just runs rough and then gets hot and quits and then wont start. Any idea whats going on?

[headache]

is the oil injector still hooked up? if so then get rid of it quick and premix your fuel. The stock oil injection unit is the best way to ruin a good motor....

[Frostbite]

what steps do i take to remove it?