I have a 1990 Blaster. I just bought a used engine for it. The problem is it will not kick start. It will roll start and runs like a raped ape when it does fire up. Stock carb, I think it is a 250 stroker. New fuel, new plug, good spark, tors removed oil injection removed. checked the reeds and they are good. swaped carbs still just roll start. please help I'm going out of my mind. also it will kick start after I warm it up for a while but if it sits for 5 min it will nit kick start again. Thanks.