Are the rules set so you can weld them up anyway you like so long as you meet the cc test?What filler material should be used? Is preheat necessary?
Just a guess . Your planning on doing the welding yourself ?What filler material should be used? Is preheat necessary?
I have one , with a fin crack that's encroaching on the sealing surface .Don't try to weld the new style KT100 head, can't be done and you will completely ruin it. Think of an aluminum sponge that just crumbles when you heat it and no amount of filler will keep up with the collapsing metal.
Sundog