I have a 250 cc Honda Phamton m/cycle with electric start and cannot keep charge in batteries?

Question

I live in Thailand and have a 250 cc Honda Phamtom . I am having problems in keeping enough charge in my batteries.
I have been to many Honda dealers and all they want to do is to sell me something but are not interested in fixing the problem.
I have fitted an extra battery but this is only recieving a trickle feed from the alternator and when I use the lights of a night and stop the bike it will not restart from the electric start.
The alternator is charging between 12 and 15 amps and the voltmetre is showing between 12 and 14 volts.
Can anyone come up with a solution to this problem

Answer 1

There is not enough amps coming from the alternator. The voltage is fine, There should be somewhere in the neighborhood of 100 amps, get the specs from your honda dealer. you may neet to replace the alternator.

Answer 2

Unfortunately it sounds like the battery is damaged and needs to be replaced. Motorcycle batteries do not have the same life expectancy as car batteries as they are much smaller.
Ja.