Can anyone help? I have a 3 year old TW125 which has developed starting problems. RAC have done tempory repair to a burnt out diode under the o/s pillion seat. Local dealer says this diode is fixed-wired into the loom and would cost £100+fitting+Vat etc. The diode is not showing up on the spares microofisch as a separate item. Surely this can´t be right, any suggestions appreciated.