The (also referred to as the Shop Manual or Workshop Manual ) is different. It is the exact document used by Honda-certified technicians. It provides:
155.3cc, 4-stroke, Single Cylinder, OHV (Overhead Valve), Air-cooled. Max Output: 12.5 HP @ 8,000 RPM. Transmission: 4-speed manual (4-down pattern). Ignition: AC-CDI (Magneto). Honda Tmx 155 Service Manual