Well yes that is a full crank 160cc.Going of the victa code I find this. [Linked Image]
That puts it around the 1980-81,which I think would be very close to what it is.As far as decoding that engine number wow I'm not sure that is possible,as during the 80's and before the power-torque engines came in the engine number system went right out the window.However I'd say that 1980-81 would be the closest to what it is.As far as not starting and from what you've said I'd be looking at carby problems.Don't look at the worse problems first look at the simple first.

Here for a good time,not a long time.