tuono100062 Posted January 22, 2012 Share Posted January 22, 2012 Hi, just joined today, ive an 79 rd 250 which seems not to be charging battery seems tired so will renew anyway but would like to know if any other rectifiers/regulator will do the job as i remember the electrics were poor when i originally had one, Cheers Link to comment Share on other sites More sharing options...
Moderator mervin Posted January 22, 2012 Moderator Share Posted January 22, 2012 i assume it is a rd250 e with cdi ignition could be reg rec could be charging coils behind rotor . you can get a replacment reg rec from http://www.electrexw...rts-2683-0.html but it will be worth investigating the rest of the system first, come over to http://www.aircooledrdclub.org.uk and we can better help ya sort it out there there will be plenty of folks there who will help you diagnose the problem Link to comment Share on other sites More sharing options...
YPVS TONE Posted January 22, 2012 Share Posted January 22, 2012 An easy check to see if it is charging is to have the bike facing a wall in the dark, start the bike with the lights on and see if the lights get brighter as you rev it. Or if you have a digital multimeter connect the leads to the positive and negative on the battery i.e black lead to negative and Red to positive with meter set to 20 DC volts and start bike. When revving to 2000rpm or above you should be getting 14.5 Volts + or - 0.5 volts. How old is the battery, is it topped up with distilled water to the line ? If it is the CDI model don't run the bike with the battery disconnected as you will damage the Reg /Rectifier unit. Tony Link to comment Share on other sites More sharing options...
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