rich the lights should work regardless of the state of the battery,i would suggest a new battery anyway if its faulty they are only about £15 all depending on the model of your gilera?but as dave says its a good chance the spark plug is fouled and a new one is a very good idea they are only £3.00 so get a new battery and new plug and see how the bike goes ok.the plugs do not last especially in the two stroke 50cc models as these burn alot of oil and it fouls the plug alot,ok.
adam bike doctor
January 2007