how can i fix my petrol gauge on my 2002 gilera dna 50cc?

Your fuel sender unit (measures the amount of fuel in your tank) is banjoed or the wires going to it are disconnected. Have a look at the top of the petrol tank for two wires which connect to the fuel sender, they're obvious enough probably black & green wires. Are they connected?

If they're ok then have a look at the sender unit. It should just screw into the tank & easy enough to take out. It works a bit like the float in the cistern of a toilet in so far as the more fuel you put into the tank the higher the float rises. Check if this moves freely up & down. Connect the wires to the sender unit & switch on the ignition. You should see the fuel gauge moving if you raise the float arm, if you don't then the unit probably needs replacing.

steo
June 2009