crankcase

I just purchased a 07 zx6r with 31k miles, and the person I bought it from said he blew the engine. He then showed me the hole in the lower crankcase; where I suspect a broken rod had punctured; but please feel free to tell me what you think could have gone wrong. I opened the airbox (no oil or...

Hello, I am having an issue. There is a tiny metal piece on the crankcase that sticks out where the shifter peg is. The shifter lever inserts into this cylinder and goes into the transmission. That piece has broken off and now I am in need of replacing the entire lower crankcase. My question...