I have a 95 Sportsman 400. I just bought it with a bad motor. Piston skirt is busted up pretty bad so I opened the crankcase and found that a piece of the piston got stuck between the crank and the case and busted a piece off. Now this piece that broke off is the divider between the crank and what appears to be an oil passage. My question is. Is this something that might be ok to leave and let oil transfer between the two or does the crank get 2stroke oil from the oil pump. I'm guessing I will need to get it welded just want to know if anyone more knowledgeable has any input before I put more money into it.