I've had my fireblade for nearly a year and i had no problems. apart from the following day when it was raining and my bike sounded like it was running on only three of its cylinders. a mate of mines who new a lot more about bikes than me helped me and took the spark plugs out and diagnose it to be a faulty plug. he also repaired it with a spark plug which was not the correct plug for the bike. i mention this because nearly a year later i'm experiencing a new problem. i'm experiencing my bike runs beautiful in first second sometime third and defiantly in fourth the bike start to chugs. i thought maybe it was the plugs cause of the problem i had when i bought the bike this time i change all four plugs with the correct one and i'm finding it running beautiful until fourth gear then it chugs can anyone help me with this problem.