Lastly, i went down to First Motor and asked the mechanic. He
said shouldn't have this problem, asked me to leave down my
motorbike and he will inspected my bike bit by bit. That includes
inspecting the engine, carburetor, valve, etc, until he finds the
root of the problem.
I dun know how much it will cost, neither does he. But my guess is,
it's not going to be cheap.
Finally, i gave up the idea and I ended having an accident because
of this. The reason when the rpm shoots above 5000, the motor will
sudden gain power (because the valve open)and there goes my bike.
So that day, the same thing happened and a car suddenly turned in
my lane and boom....