52EMERGENCY TROUBLESHOOTINGThe following table lists the main problems which can occur during operation of the scooter.Problem Possible cause SolutionThe engine will not startA. Engine stop command A. Place the engine stop command in positionB. Brakes not activated or brake switch defective B. Operate the brakes If necessary, see an authorised Quadro Vehicles centre or qualified workshop.C. Fuel tank empty C. Check the fuel levelD. Dirty spark plug D. See an authorised Quadro Vehicles centre or qualified workshop for cleaning or replacement.E. Air or fuel filter clogged E. See an authorised Quadro Vehicles centre or qualified workshop for cleaning.F. Clogged engine F. Remove the spark plug and vaporise fuel inside the cylinder. See an authorised Quadro Vehiclescentre or qualified workshop.G. Blown fuse G. Replace the blown fuse and have the vehicle checked by an authorised Quadro Vehicles centreor qualified workshop.Reduced braking powerA. Damage to brake pipes A. See an authorised Quadro Vehicles centre or qualified workshop to have the component(s) replaced.B. Brake linings or tyres too worn B. See an authorised Quadro Vehicles centre or qualified workshop to have the component(s) replaced.C. Brake disc greasy C. See an authorised Quadro Vehicles centre or qualified workshop.D. Brake pads worn D. See an authorised Quadro Vehicles centre or qualified workshop to have the component(s) replaced.E. Air in the front and rear brake circuits E: See an authorised Quadro Vehicles centre or qualified workshop.Noisy OperationA. Worn bearings A. See an authorised Quadro Vehicles centre or qualified workshop to have the component(s) replaced.B. Damaged silencer B. See an authorised Quadro Vehicles centre or qualified workshop to have the component(s) replaced.C. Problems with the cylinder head C. See an authorised Quadro Vehicles centre or qualified workshop to have the component(s) replaced.The vehicle will not move A. Parking brake and/or tilting lock engaged A. Release the parking brake and/or tilting lockThe engine stallsA. Air or fuel filter clogged A. Have the filter cleaned by an authorised Quadro Vehicles centre or qualified workshop.B. Silencer clogged B: See an authorised Quadro Vehicles centre or qualified workshop.C. Fuel tank empty C. Check the fuel levelSuspension ineffective A. Loss of efficiency/trim A: See an authorised Quadro Vehicles centre or qualified workshop.Poor performance, high fuelconsumption A. Clogged or dirty air filter. A. Have the filter cleaned by an authorised Quadro Vehicles centre or qualified workshop.