i am looking at a 98 blaster 200, the person i might buy it from said the piston blew in peices and blew the top head up. my question what kind of damage could this result in , with the lower motor or crankcase or if the cylinders not all beat up .... this guy bypassed the oil injection and said he mixed it wrong causing the piston to blow he is trying to tell me all i need is a piston, cause he has a spare head were there spark plug is ... should i stay away from this before buying and making a huge mistake ..... thanks any help is appreciated