MatthewDavid

Yes you can weld your cracked aluminum frame, I did mine just this summer. Snapped it just in front of the rear hub. Your going to want to TIG weld it and to have some filler rod as well. When I did mine I got a away with out the filler because I had good fit up and lots of material to work with but if your fit up isn't good you will need it. ***THE MOST IMPORTANT THING WHEN WELDING ALUMINUM is that you prepare the aluminum properly, the aluminum oxide that forms on the metal has a higher melting point than the aluminum itself so what you end up with if you don't clean your metal very well is an aluminum oxide balloon filled with molten aluminum that just bursts and drops through once you get it hot enough to melt the aluminum oxide as well. Prepare the area by scrubbing it thoroughly with a clean wire brush, use a good solvent like acetone to remove any remaining dirt from brushing and proceed to weld right away. Aluminum oxide will reform fairly quickly and especially after the material has been heated, which means re-buffing and cleaning if you weld let it cool a bit and weld again. As well using a good heavy chunk of aluminum strapped out of the way to the area being welded as a heat sink is also highly recommended. It will help to avoid concentrating unwanted heat around the area being welded as to avoid issues with effecting the tempering process of the aluminum as mentioned above. Hope this helps!

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