i got the lights that people use from walmart and i bought the 20 watt lights to put in them and the blew out in like 5 min. why did this happen
the regulator is under the hood on the kicker side, the tors and cdi are on the shifter side, but i'm bettin you touched the bulbs with your bare fingers ???, that gets oil/grease on them and they will blow after heating up, never touch the bulb, use gloves or a clean rag/paper towel
and you should be able to put a meter across the headlight wires one at a time to the ground wire, with the bike running, rev it and report back with the voltage, or find the spec in the manual???