I wanted to ask you guys if this is a problem.
On the bike I am trying to rebuild, the cam chain had flopped around and sawed the case and it was something that seemed to only be mildly structural, it was a pretty shallow scratch. I had a guy weld and "fill" that trench and sanded it smooth. I have had the bike running since briefly, but since the full on parts collection and rebuild is on, would it be an issue in future as in if I get it hot and cold a few 100 times ?

Cool.
Srinath.

batman wrote on 01/13/20 at 06:39:14:



It was tig welded with whatever they use for cast aluminum, it was 10+ yrs, I forgot what its called. And the cyl is pretty high as well as lined by a steel liner, which was honed after this weld up was done, I think only the case had the cut, cyl was in affected.

Cool.
Srinath.

batman wrote on 01/13/20 at 18:27:41:




I don't believe my cyl assy was scratched up at all. So just crankcase.
I do have faith in my welder, a chunk of this crap isn't gonna fall off. But yes thermal expansion was where I was going, especially repeated cycles, it is pretty much the same cast porus material laid down by a welder, sanded to the same grittiness by me, and likely will take oil and age with the rest of it with heat cycles, but just wanted to look for any gotcha's.
Cool.
Srinath.