New engine trouble 66 cc.
I've got only 20 miles on a brand new 66 cc engine, Took a fast look at it after needs presented turning the cylinder head to face the plug forward for clearance.The assembly absent the piston will move up and down vertically I'm doubting damaged over all only a few vertical scratches are present on the piston. How loose is worn out or incorrect ? The vibration is likely above what most would find acceptable should I run it or replace it ? 10:09 PM 4/18/2015