M suzuki GSR 600 ABS owner from Nepal.I have a serious problem with thus bike. The throttle always gets tight. Every time i go for a long ride then after another day throttle gets jamed. Here in workshop they told due to low grade fuel. Is it really due to fuel?...suddenly while riding ...i was in second gear, speed was around 100 and noise came out from engine. it has only clocked 2475 km....problem was diagonised as the piston is damaged........plz i would like to know what may be the reason behind it???????