Hole in case

Crank Seals

I just finished rebuilding my cr 80 i bought it blown up. I was lookin at the old piston today and noticed that there was a deep gouge on the exhaust side. Then i noticed the crack in the crankcase cover over the generater . So did the bike previously blow up because of that ././ If so can i change that seal without splitting the cases.

I just finished the rebuild on my 86 cr 80 and i bought it blown up. The guy i bought it off of said the kickstart wasnt working right. So i took apart the motor, removed the clutch assembly then the kick start assembly. Infront of my eyes was a lil hole grinded into the case by the gear justy before the spring in the kick start assemble .. Now the kick start is fine .. But is this hole a problem .. SHould i patch it up or ? :think: