Hi, took the zed out for a run tonight and decided i would pull over on a quiet stretch of road and launch it from standstill ( haven't done it and got a 1/4 mile challange coming up against a mate ). Now apart from smoking my clutch, when i changed from 1st to 2nd it was popping and banging ( something it hasn't done before except on overrun ). Another thing i noticed when putting it back in the garage was the n/s exhaust didnt seem to have the same kinda constant pressure as the o/s ( if you know what i mean? ) it was kinda stuttering.

 

Apart from that it seems to be fine, possibly just worrying about nothing but thought id check.

does your exhaust have a mixer pipe?

I'm sure it doesn't have a mixer pipe, though I would need to check to be 100%

Sounds to me like you have a missfire and there is unburnt fuel igniting in the exhaust. Worth checking the coil pack connections and even considering a failing coil pack.