1. drewpy

    some more tech history from Yamaha

    the dohc twin has a mention :) http://transgarp.dyndns.org/motorcycle/pdf/History_Yamaha.pdf
  2. Travis

    History of the Yamaha XS400

    So I've done a little digging and couldn't find much on the history of the XS400. I thought it would be nice to have a place for people to compile what they know about the XS400. Things like what years they were made, model designations, differences, VIN numbers for each year, colors...