Since I tyoed this out for another frum, may as well put it here too.
Location of various numbers on the ST11:
VIN on left side of steering head
Engine serial number - stamped on the rear of the lower crankcase behind the oil pan
Frame serial number - right side of the steering head
Carb id - stamped on each carb body on the intake side
Colour label - sticker on frame cross member under the seat
If you don't have it, the Honda manual has all sorts of diagrams showing where labels, ground connections etc etc are on the bike. Link in the sticky above.