NEW ROYAL ENFIELD BULLET 6.4V SWISS RECTIFIER. This replaces the old Lucas Regulator Rectifier which came fitted to many Vintage British Motorcycles including Royal Enfield early models. This is 6.4 Volts Regulator Rectifier Unit and comes with positive ground. Direct Replacement to Original Part No. 143424. This can be used on all the 6 Volts models of Royal Enfield Motorcycles and many Vintage British Motorcycles with 6 Volt System.