busyeddie Posted December 13, 2014 Share Posted December 13, 2014 Went for a test ride after tightening a few bits up, seemed ok, but I haven't got used to the backwards gears yet. Over revved the bike and heard a pop. Lost dipped beam. Switched to high beam to ride home, but shortly after lost this too. Then the back light died. Can I assume these basic bikes don't have a regulator on the lighting circuit? And why did the lights not all die at once?! Quite keen to get this fixed for Xmas as it's a present... But work is pretty mental ATM. Any help much appreciated. Ta in advance!! Link to comment Share on other sites More sharing options...
Moderator Airhead Posted December 13, 2014 Moderator Share Posted December 13, 2014 check the battery didnt boil dry Ed . I think they used a resistor for something, perhaps they dropped any excess voltage by this crude method. I have a wiring diag and parts manual if you PM me we'll arrange for you to also have them Link to comment Share on other sites More sharing options...
busyeddie Posted December 13, 2014 Author Share Posted December 13, 2014 Cheers Paul Having thawed out i thought the same re battery I'm gonna have a look tomorrow evening after work PM sent! Cheers Link to comment Share on other sites More sharing options...
Moderator Cynic Posted December 13, 2014 Moderator Share Posted December 13, 2014 I think they have a proper regulator. That would be the pop. Link to comment Share on other sites More sharing options...
Moderator drewpy Posted December 13, 2014 Moderator Share Posted December 13, 2014 new reg/rec would do it if they have one Link to comment Share on other sites More sharing options...
JimR Posted December 14, 2014 Share Posted December 14, 2014 the YB100 (dependant on modal year) had a resistor (hidden behind the number plate) to check if you have one look for a yellow wire with a black trace disappearing into the number plate mount.. if present they never normally gave problems but if the earth (via the rear mudguard) failed you could pop bulbs ! are you sure the head light blew first ?? it is possible the rear light blew first and sent 2 much to the headlight and switching to 'dip' just then blew the dip filiment Check the wiring harness by the head stock if the outer casing is cracked there is a chance that the white wire from the rectifier is shorting out (this problem popped bulbs also and boiled the battery) Check the connections to the rectifier (white & red wires) Check the white wire connection from the mag (under the L/H side panel) .... (this may be a yellow wire or yellow/black trace ... depends on the year) Link to comment Share on other sites More sharing options...
busyeddie Posted December 29, 2014 Author Share Posted December 29, 2014 Thanks for the replies, truth be told I haven't had time to have a look yet, due to Christmas, but there's some great pointers here do be getting on with!! Cheers Link to comment Share on other sites More sharing options...
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