mjmotorfactors

Hi All, I have recently bought a Yamaha TY250 Mono Shock which I have been slowly bringing back to life. I dont know much about the year of the bike and that would be a help so first off, if anyone can point me in the right direction of finding out the year of the bike I would be very grateful. It has a plastic tank and a mono shock rear, with Gold wheel rims. The reason for this post is that I cannot find the autolube oil resevoir. There just isnt one and from a pdf manual i bought (not very good) I cannot get any info about the engine setup of this. When I bought the bike I was told to mix the fuel 70:1, but ive since been told it should be autolubed. I think the bilke has been heaviliy stripped for trails riding and it may have been disabled in favour of direct mix. Is this approach going to ruin the engine? Thanks in advance of any responses. Scot TY250 (no idea of the year and all the gear no idea :-)