Not only does Thin Air affect the motorcycle but apparently it has a real time with some people and the way they think. Arizona, Colorado, California...I wont pick on any individuals, but simple things that are in a Kawasaki Service Manual, may not be found in wanna-be manuals. If you bought a Kawasaki why buy a generic manual that is incomplete? Go to Beartooth or call them, their number is on every page...order the Service manual, it is very inexpensive compared to repairing something and messing it up, or not knowing how to do it and having a friend tell you..the way it was done 50 years ago. I'm absolutely setting here laughing at how people check their oil levels...and how upset people are getting about how to do it...IF yo don't know, just drain it and put in the right amount back in...gee, I guess you need a manual for that to, don't you? Then again there is the metric conversion to deal with...I'm starting to feel more like Andy Rooney, than ZX-2R "The RANTS&RAVES SPECIALIST."