This is for my 79' Kaw KZ650SR, not my dirtbike. Anyway, one of the (3) mounts cast into the left side crank case for the chain guide to bolt up to somehow broke off leaving about a 1" x 1/2" hole in the crankcase. I found it after noticing a pretty steady oil drip on the drive while the bike was running. I have the peice that fits into the hole. Now, my question is, can I repair the hole? If so...how? I was thinking some sort of "high-temp" JB Weld or similar, or a possible weld repair. Heliarc? Where would I look for this type of service? Any advice is greatly appreciated. Thanks!!!