I don't know if it's widely known in the MX community that Japanese "phillips" screw heads are different from others. I work on motorcycles out of my home and I can always tell when someone tried to use a regular phillips #2 driver and mangled the head. This was a big problem on 1970's streetbikes where many engine covers were held on with JIS screws. Most screws back then required a impact driver to remove engine side covers and such. I'm not sure if modern 4-stroke MXers even have many phillips type screws or have moved to Torx or triple square like modern streetbikes. If you are having problems with screws on your Japanese motorcycle you might want to try a set of these. This is a Hozan JIS set I recently picked up on Amazon. Vessel tool is another good brand that makes them as well. http://www.amazon.com/gp/product/B003F63WI8/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 Standard #2 Phillips on the Left, JIS #2 on the Right.