I havent changed the piston and rings on my moped yet but for my dirtbike i just start it, rev it at alot of different postitions besides full throttle for about a minute or so, kill it and let it sit for about 30 min so it cools down fully then repeat the process once more and your ready to go. I probly wouldnt go as far as putting the ratio as low as 32:1 but maybe 40:1 for the first tank of gas. Why did the shop say you NEEDED a new piston and rings? was it seized?
Re: how long is break in on new piston and rings
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