i have a 2001 blaster and i put a new oil block off kit on it and as soon as i started it up after installing it it fouled a spark plug and then i put a new one in and it ran all day for about 4 hours and then wen i let it sit i tried to start it after about 1 1/2 hours and it took me abuot 20 kicks to get it started. i put in a new top end and it only has 10 hours on it soo i don't know wut the problem is. any advice on wut it might be or how i fix it? thanx guys