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Posted on Apr 04, 2009
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Piston rings just bought new piston rings,how easy r they to fit in to bore thanks gareth THE BIKE I GOT IS A SP 125CC 2 STROKE

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tombones

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  • Master 3,567 Answers
  • Posted on Apr 04, 2009
tombones
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Joined: Mar 11, 2009
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First, be sure they actually do fit the bore. Take a ring and insert it in the bore. push the ring halfway into the bore using the piston. There should be about a 1/32" gap in the ring. Anything more than 1/16" and you need rings the next size up. If the ring won't go into the cylinder because the gap fully closes, the rings need to be a smaller size.

With the correct size rings, put them on the piston. Some pistons have an index pin in the ring groove Fit the gap to the pin. Put the piston mid-stroke and place the cylinder over the top of the piston. Squeeze the rings closed as you gently tap the cylinder downward and over the rings.

Please rate this solution. Thanks garethholleb!

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