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Old 10-06-2013, 11:12 PM
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mrfubs mrfubs is offline
Motorized Bicycle Elite Member
Join Date: Jun 2013
Location: michigan
Posts: 294
Default Re: How durable are these engines?? 66cc

the cylinder wall is only flash chrome plated and is very thin. it has a tendacy to chip, flake, wear, score really quick. so take note when your breaking the engine in. The piston rings are 2mm thick, thats 1mm thicker on each ring than they should be and are bare steel riding on a thin layer of chrome. pick out a good oil.
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When in doubt Throttle out!
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