So i made the pocket bike exhaust work but i wont be using it for now because of 2 things: there is a bit too much noise for it to be ridden on public road and it starts 4 stroking like crazy above 35km/h. BUT the torque is about 30% better then the stock exhaust so it would be good if i would install a smaller sprocket or for a trail bike. Now could i improve the exhaust i made in any way? I would say it is either too long of a header or that there are too many bends in it (it has a 45° flange coming right from the head)
Moderators Note:
I manipulated that 1st pic to a pic that can be seen somewhat easier, the second pic...DAMIEN