If this is an S2 bulb, a Tomos moped socket may work. I just bought a 2012, and the bulb crapped out immediately. On a Friday Afternoon. My ride left to go home, figuring I was ok. Dealer looked around, went "oops", we'll have a bulb tomorrow from another location. Crap, I'll ride it home, hope I don't get stopped in 3 miles. Looked at bulb, saw it was S2 bayonet bulb (ba20d) 35w, said "hey" got one in my Tomos ST! The holder looked like the same twist fit, YMMV. But the S2 is a crappy crappy bulb. Going with an H4 retrofit.