i almost flipped mine before infront of a load of people coming out of college lolz
__________________
i blew my dt up ... but i fixed it.... Then i crashed it.... but i didnt fix it right and 2 scouser's come in the middle of the night and left me with a working bike
How come you're using allen keys all over your bike?
Probably over tightened the exhaust and put stress on it causing it to snap from expanding when hot etc etc. Can't be bothered going into technical scientific reasons.
The heat expansion? Nominal mate. Whats the melting point of steel/iron. Its a LOT hotter than what the dep runs at. So heat expansion is minimal at best if not negligable.
More likely due to the previous statements. Stress due to broken frame or vibrations.