will the oil pump off a 2001 wr426 fit a 2000yz426f? i wanna know if i can buy the oil pump off TT. also, im lookin at a bike for sale, the guy says the rod seized on the crank, and it needs an oil pump. the crank has been machined, and a new rod installed. what else might be wrong with the bike. he says it only needs the pump, but i dont wanna get screwed.