I have Bajaj Dominar 400 CC single cylinder bike with FI system.its 7k on odo now.Recently i pluged Diagnostic tool and found my LTFT is negative 11%.My bike has underbelly exhaust with catcon as slipon. Few days back i got to remove my catcon, i kept underbelly silencer with baffle as it is and i found my bike performance increased drasticaly, and when checked and i found LTFT started decreasing from -11 to - 8 %.
Does this indicates my company given stock exhaust system has more then required exhaust restriction? which is causing richer exhaust ?
STFT is variyng at idle and different RPM but almost near to zero.