You aren't reading.
So quick ?
10 years is 'quick' to you ?
(I think you are thinking it 'clogged' within that one week... no... it slooowly built up over those 10 years till it finally started to affect flow)
And the cleaning took all of 5 seconds... (took 2 minutes to find a suitable rod and bend it).
I don't think it has anything to do with 'impurities'... I think it has to do with not getting hot enough because of my short trips.
Did you see that part where I said I get no carbon build up in the other motors ?
The reed valve is at least twice as big in the 'new' one.
(but some companies DO make what you said... reed flappers made of differing degrees of stiffness... they give different power characteristics)