Originally Posted by Commander Billypool
when I stand on the bike the frame flexes enough to throw the chains off the sprockets / it actually twists the bicycle frame I can feel that through the handle bars which I find scarcely believable.
This bike is unsafe. It should not be ridden. I don't believe there is any room for dissent to this opinion.
Maybe start a thread on it? I bet you'd get a boatload of good advise. Please be careful.