You need to contact the VMCC Library at Allen House and ask them for a works record extract based on the frame number. They will send you a certificate that gives the info and that will let you know which engine, box etc the frame left the factory with. If you are near Allen House you can also visit and view the records yourself. They charge a small fee for doing the research and sending the cert. Many Scotts have had engine butchery or had cranks break that in turn punched a hole in the crankcase meaning bikes with matching numbers are not like hens teeth, but are valued as a minority.
https://www.vmcc.net
Regards,
Richard
