It's a H5006 bulb, they show them for $8.10 online. Also I've seen voltage regulators on eBay for pretty cheap.

Sorry no regulator or headlight. Just a bare bones sled, tunnel, belly pan, two hoods, gas tank, steering, clutches, exhaust and bottom end of the engine (seized). FYI, Napa has headlight bulbs for $9.

Any takers? Going to the scrap yard this week. Also has a good crack free hood and gas tank.

I have a 1980 trailfire that was a parts sled, most parts have been taken off of it, but there are still some good parts (tunnel, bellypan, steering, handlebars, ect.) If anyone wants it let me know, would rather see it get used than go to a scrapyard. Im located in west michigan.