I have purchased a Yamaha 125cc YBR Custom, and I like you have problems with the lights, I purchased the bike 7 months ago and have added a light bar on the front with two 12v 15w halogen spots and two 12v 15wt marker lights on rear. problem now is after an hour the battery goes flat, I need to upgrade the Alternator, but cannot find the specifications of the actual alternator already fitted, and not sure if I can upgrade to a larger unit, to solve the problem at the moment I ahve disconnected the headlamp bulb and use the spots, but when I get home I must put the battery on charge ready for the following day, any one got any ideas on how I can upgrade and to what from what.
many thanks
Tony.