Re: 2nd broken frame
Aluminum frames are more prone to cracking from engine vibration than mild steel or chromoly frames. If you get your frame welded, there is no guarantee that it will not crack again. I am sorry to say that your safest bet is to get another bike that does not have an aluminum frame.
"It's a chinagirl. It's a sometimes fun little engine that often will break your heart. It's disposable.
Does not come with a fortune cookie."