There are several painting threads here with details of using the vinyl decals as masks, to peel off and leave the decal painted on.
Fleabay is full of vinyl decal suppliers. Oddly, the Indian made ones are way more $$ than genuine, which is bizarre.
If you want a factory looking finish, research well the original scheme, including decal color and size.
750 models generally didn't have pinstripes. (except the black'n'gold d-shaped scheme of some years).
A lot of discussion too of only applying the decals with the tank and sidecovers fitted to the bike - or the decals will look uphill or downhill.
They should be horizontal...
Hopethishelps.