I purchased a blaster today for $200 in non running condition. i did a compression test and it was showing about 100psi. it wont turn on when using the kick start but when push started the engine fires and it begins to backfire and it even spit a flame as there is no exhaust on it and then it dies soon after. You cant get it to stay running. i checked for spark at the plug but the spark that it was making looked very small and weak. what can cause that? does it sound like a fuel issue or a spark issue or can it be the motor that needs to be worked on. Also during the process of getting it started somehow the case around the clutch cracked. i attatched pictures . crack is in third picture next to clutch lever