A loose front exhaust clamp will allow the pipe to vibrate non-rhythmically with the engine and that thin brittle mount is not gonna last long like that. I bet even if it had a gussets it would rip out of there. I'm not saying yours was... I wouldn't know. I just know thats the case with other exhaust experiments I've done in the past.

Seems to me that since the pipe is ok, you could make a "J" hook to bolt to the engine and just hose clamp it back on Buell-style Even if the front pipe loosened up at least it wouldn't fall off!