I have to repair damage to a 2-stroke dirt bike's cases. The damage occurred when a bolt or a threaded stud ended up in the cases (don't ask how - I have no clue) and was pummeled around by the crank shaft. It was wedged against the case by the crank shaft in a few spots and created half a dozen small cracks around the perimeter of the case before getting sucked into the intake port, embedding itself in the piston crown, and seizing the motor.
Here are a few photos of the damage:
Can anyone please suggest the best way to repair the cracks?
Thank you very much in advance for your help.
-- Ilya
PS: I don't think it's of any importance, but the bike is a 2001 Yamaha YZ250. The cases are not a stressed member, so air- and oil-tight seal is the primary consideration.
PPS: This group has been a great resource for me, allowing me to add welding to the small arsenal of tools at my disposal, which is a great help for my motorcycle hobby. For example, this is the latest of my welding projects, which I wouldn't have been able to accomplish without learning everything I did by reading the posts here: