Why do you think they have tolerances? Because not everything is the same. Let me list the motors that I actually had to file the ring to get the correct gap.
B16
GSR
LS
D15
You've only done this on one motor, so you only have one opinion...you don't have much experience. You're crazy if you think that you can go buy 100 packs of rings for a GSR motor and they will all fit every GSR cylinder perfectly with the perfect gap, no filing necessary. There's a reason why Honda created that section of the manual.
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