L200 owners help me. Meter panel spoilt, fuel needle stuck

[daijoubu86]

My L200 meter suddenly fuel needle stuck at 1/4 position. It wont go down when i off the car. If i were to tap tap tap on the meter front, the needle will drop all the way down. When on car again, sometimes will go up sometimes no. But if i were to tap tap again, it'll go up. Something is not making it go up smoothly. Any1 knows a fix for this? :) Thanks!