- Jun 28, 2006
O.K Guy's I suspect I have a crank seal leak on my 05 yz250. I have a crank pressurize tool kit that I will pressurize the crank case with this week. My question is this, can the crank seals be replaced on this bike without opening up the cases? I replaced the crank seals on my kx500 and had to split the cases for that bike. A guy at work said that you can drill a small hole into the seal and thread in a machine screw and pull out the seal. I wouldn't mind opening up the cases but would like to get a few more rides out of the bottom end because if I'm going to open up the engine I'm going to completely rebuild the lower end.