not sure the exact year but after 1980 most manufactuers inc suzuki started using 17digit vins and no longer contained the model of the bike in the vin/engine number, so it's definately pre 1981
i have a 79 pe175 and I am finding that only 78-79 parts will work....so far nothing else seem to work....
Pure Enduro
Can't tell by the motor number. The Suzuki PE 175 was made from 1978 to 1984. The link below has links with photos to each years model, maybe this will help.
if you ring Crooks Suzuki 01229 822120 they can tell you and you can get a certificate to take to your local dvla office if your after an age related plate, that's what my brother did for his pe 400.
Between $500 and $1000 approx