Update...
here is a excerpt from wiki-
The
JIS B 1012 is commonly found in Japanese made equipment, such as cameras and motorbikes. Superficially it looks like a Phillips screw with narrower and more vertical slots, to give less tendency to
cam out. The bottom of the recess is flat, and the point of the driver has to be blunt. A Phillips screwdriver has the same 26.5 degree cone angle but because of the tapered slots and pointed tip will not seat fully, and will damage the screw if forced. A correctly sized JIS driver will engage at full depth into a Phillips or Pozidriv head screw slightly loosely, but without damage. JIS heads are often identified by a single dot or an "X" to one side of the cross slot.
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"JIS" standardized cruciform-blade screwdrivers are available for this type of screw, and should always be used to avoid head and driver damage.
since this is a Japanese manufactured motorcycle, it has the JIS (Japanese Industry Standard) bolts and screws that are metric threads.
If you ever try to put a #2 phillips bit into a JIS screw and put any pressure on the phillips bit, the screw will become useless and become more like a rivet at that point. the screw has been cammed out and will need to be removed by other means.
i have found this out after having to drill out hundreds of JIS screws.
all but a few were damaged by Neanderthals that didn't know the difference but, had a go anyway
the other few damaged fasteners were from this Neanderthal, before i knew there was a difference in my youth.
I'll teach the boy the difference
i purchased him a set of JIS screwdrivers (so i don't have to give up mine
)
a first step be seems to me, would to explain the difference between using the wrong tool and using the right tool.
and the grand importance of using your first tool, your brain !
second i'll present him with the correct tool (
https://smile.amazon.com/gp/product/B07P8R2X3T/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1)
i have made a living by fixing broken things, from lawnmowers, to rolling cranes, from icemakers to tar kettles, from high speed weighing , wrapping systems and portion control slicing machinery, from hydraulics to pneumatics, from electrical to mechanical systems.
i don't say this to boast, but rather to explain that it all started for me when i first worked on something.
my intention is to pass as much as i can on to him, and to anyone else who is interested.