sorry. i have not use the voltage regulator circuit in its place i ues 2 diodes and that has droped the voltage to 12V and is fine, the problem is the bike is drawing the power out of battery when the engine is running.
and it was the HID light that went out.
the battery when fully charged will run the light for at least 45mins. but when the engine is running at high RPM it drains the battery in seconds. i need to use some thing to only allow the flow of current one way in to the battery.
i hope this is a bit clearer