So, I found a crack from my SXF250 07 crank case. Cant find any info about the alloy.. is it aluminium? magnesium? aluminum-magnesium? Is it possible to weld? I know a guy who is a specialist on tig welding. But what do you guys think about these pics. Can it be done? Or.. should I just scrap the engine? Is there any problems to install a 08 or 09 engine on 2007 frame?