About Kawasaki's Ninja 400 engine break in guidelines: Ridiculous and actually non-ideal. You cannot actually keep the bike below 4000 RPM realistically if you go anywhere on the highway or especially the expressway. Kawasaki made the guidelines due to expecting people to go way over them...

Anyone deciding to run shell T4 deisel 15w40 oil in there kawi 400, or other diesel oil similar?? and how are the results? TY