In the early days when I started winding coils, a very common one was XL250-S which had low output to their headlight, sometimes they had too much.

A rewind fixed the low output ones okay.

The ones that were blowing globes, I tried to rewind with less turns, increased the air-gap, cut the ends off etc. but could not stop them from blowing globes, a large wattage resistor or an AC regulator was needed. (see "Blowing headlight globes")