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Board index » Questions & Answers » Honda CR, MR & MT

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gene03079
PostPosted: Mon Mar 04, 2013 1:57 pm 
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Joined: Mon Jun 04, 2012 5:50 pm
Posts: 3
I am installing a new piston and rings in a 1977 Honda CR125. My bottom ring goes on fine and moves easy. The top ring is very tight and does not sit in the groove. Almost like the top ring is to thick. What can I do about getting a better fit?

Thanks
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bronc3
PostPosted: Tue Mar 05, 2013 4:48 am 
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Joined: Fri Dec 07, 2012 8:54 pm
Posts: 13
You need to find a ring set that matches your piston. There are a few different pistons out there and you have to use the matching ring set.
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ohiomotoxer
PostPosted: Tue Mar 05, 2013 5:53 pm 
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Joined: Thu Jan 03, 2013 6:30 pm
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whos piston/rings are they? OEM, Wiseco etc?

_________________
1994 AHRMA National Champion Sportsman 125 Intermediate.
1996 AHRMA National Champion Classic 125 Expert.
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gene03079
PostPosted: Tue Mar 05, 2013 6:28 pm 
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Posts: 3
I was using a stock Honda piston. After messing with it a few hours I tried another new piston. The rings fit as they should on this one.

Kind of odd as both pistons are boxed with the same part number.
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mdlafferty
PostPosted: Wed Mar 06, 2013 3:30 pm 
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Joined: Thu Jul 22, 2004 3:54 pm
Posts: 150
Location: Surrey, BC Canada
The CR125 piston and ring sets are different from the MT.
The MT rings are thicker than CR.
Maybe someone mixed up the parts in the boxes.
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