Piston/cylinder ping question

Marc Alan /
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My stock a35 is running great. But there's 2 Minor issues can't be normal and I need guru advise please? When I slow down and go to open throttle it falls for a second on its face then accepts the throttle runs good except for beginning the throttle hesitant for split second like then takes the throttle. 2nd issue is a ping sound in the cylinder and piston. It's got Cocoa plug b6hs ngk 62 jet dellorto 1412. Help appreciated thanks in advance

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