I picked up an old enduro bike today from some family friends. Actually it is the bike I learned to ride on as a kid. The problem is the bike needs some work and a gas tank. I am trying to figure out what model number it is to find parts/manuals/general bike information. On the frame i can barely make out the VIN# IT9-080377. I can't find anything online regarding this, anyone have any info as to what type of bike it is? It has white fenders and from what i remember as a kid the gas tank was silver. Did Yamaha ever make an IT 90 in the mid to late 70s?

Sounds like a 1977 dt 100d.