TCT,
That is a beautiful bike. I have four QA50's - all in need of complete restoration. Three are K0's - circa 1970-1972 models (two Sprout Green and one Gypsy Yellow). The fourth is a K2 1974 model (Candy Orange).
Yours appears to be a K3 1975 model. That was the last year of production for the QA50. Check your VIN to be sure. If it is in the following format, it's a K3 1975 :
QA50-4XXXXXX
Also, the K3 1975 model had a Mars Orange tank with black graphics. The K2 1974 model was Candy Orange (metal flake in paint) with white tank graphics.
Now.....your mileage may vary. Many times people restore these things with whatever paint, graphics and fenders they are able to come up with......so, yours may be a 1974 - dressed up to look like a 1975! The only way to know is to look at the VIN.
Anyway, SWEET bike. I surely hope my QA's will look even half that good whenever I get around to restoring them. Congrats on an awesome find!
This link is an excellent guide to QA50 identification:
Click here:
Honda QA50 50cc Motorcycles
Resto