I picked up on the cheap a 1980 Yamahasomething.I donĀ“t see any displacement markings on the cases anywhere except 2200cm3. The numbers on the top of trans. area are 4U800036.It is a four cylinder YICS motor with a four into 1 header. If anyone can tell me what size this bike is and/or what model I would really be thankful. I need intake flanges, but I need more info on the bike. Thanks, Shawn at KroyKustom@aol.com P.S. anyone with any info on this bike, feel free to e-mail me.