Just received my Offical factory Yamaha service manual.The manual is mainly dedicated to 1987 and 1988 data(placed in the last two thirds of the manual).The first part of the manual, I guess is going over the "new" implementions on the TW from over the years.I now see why folks are having some issues with drive chain slack maintenance etc.. The photo's(not the drawings)in this manual are horrible!,even in the 80's when these pictures were taken,the quality/attention to detail should have been a priority....man o man,never thought I would have seen this type of manual come out of Japan.