I own HONDA APE 50 cc, 100 cc and bought it to install a high cam to 100 cc this time. Originally I was expecting because it was a reputable item in the world, but it was a bit disappointing. The contents described are contents similar to those in the service manual, and since the illustrations are faithfully reproduced, there is no problem, but there is a feeling that it is painfully hard to read personally. Since necessary information is covered, if you own the relevant bike, it is safe to have one copy at hand. I am happy if you can sell a set type combined with waist upper knitting and lower back knitting at a little cheaper price.