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2 Stroke Bicycle Engines & Kits 2 stroke motorized bicycle engine kits need careful installation and setup, find out how from our professionals here!


re-installing piston rings

2 stroke motorized bicycle engine kits need careful installation and setup, find out how from our professionals here!


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Old 07-08-2011, 02:42 PM
Diver Diver is offline
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Default re-installing piston rings

Is there a specific way to install piston rings so they function properly--does it matter as long as they're on correctly? Do I oil up the cylinder prior--do I break-in the engine again?
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Old 07-08-2011, 02:46 PM
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Al.Fisherman Al.Fisherman is offline
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Default Re: re-installing piston rings

There is no up or down on the rings..look at the ring to make sure. There are two pins one in each grove, the pin HAS to go between the ring ends.

...
Light coat of oil will work, same oil you mix with the fuel. I'd ride it easy the first tank..set the rings in, but that's me.
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Last edited by Al.Fisherman; 07-08-2011 at 02:49 PM.
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Old 07-08-2011, 04:35 PM
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Default Re: re-installing piston rings

actually, because there is a pin there there IS an up and down. you need to make sure that the ring at its gap is flat side down and the rounded part that goes against the pin is up. to re-install you MUST have the gaps at the locator pins, then you just squeeze with your fingers and slide the cylinder on, squeeze the top ring, slide it on, squeeze the second ring, slide it on, then you're good
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Old 07-09-2011, 01:30 AM
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Default Re: re-installing piston rings

Wow ,guys- thanks for saving me another rebuild!
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Old 07-09-2011, 05:47 AM
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Default Re: re-installing piston rings

No problem, you are very welcome
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