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Here I am again with more pics...I have read alot about pistons and I am interested to learn the most possible.
I think the jetting it is a little rich(some carbon in top of piston) and about the light spots on the side of the piston ? As I have read that could be improper warming of the bike or wear.
Pls give me your opinions.
BTW The pics are very bad but I can not have better...Inside the piston does not exists any carbon only a light brown color.