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Pro-x Piston ring is omni-directional on 2010 yz125

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I wanted to memorialize my short conversation I had with a Pro-x representative in reference to my 2010 YZ125 pro-x piston kit, specifically the ring and it not having markings as to its installation orientation.


I realize the common knowledge is that if the ring has no markings then it can be installed either direction(omni-directional). However, lying in bed this morning at 4am I realized that I checked the ring three times before i put the motor back together and did not see any markings. My son and I are leaving for Durhamtown on Sunday and I wanted to make sure.


I emailed Pro-x and received a quick response.  


It has been edited for content. 



Good morning Sam,


I have checked the ring and indeed, no markings.

This ring would be omni-directional.


Best regards,


Peter Schalk

International Sales






I purchased a pro-x piston kit for my YZ125 from my local dealer.  I noticed there were no markings on the ring for direction of installation. Is the ring omni-directional on the YZ125 kit?





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