Posts
432
Joined
3/13/2023
Location
cairo, IL, USA
Edited Date/Time
3/13/2023 8:51am
Does anyone know what this means? Does one go on top? I have not rebuilt a 2 stroke top end in a while and am a little fuzzy on the details. Any other refresher tips are happily received also. The image is a close up of the piston rings and the markings on them, check it out!
Pic didn’t show up. Some times rings are labeled for which side faces up.
Did this one work?
These are OEM Yamaha rings, by the way.
Anyone?
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I'm pretty sure the lettering faces up but i'll check my manual in a couple of hours.
I don’t think the lines on the outside edge mean anything.
Thank you both!
It could be relative to batches or something like that but that's a little far fetched. I can't imagine damaging my bike while trying to preserve it.. something about that is just sad lol.
The lettered markings should face upwards upon installation to the piston. The ink markings are inspection markings. If seen a few OEM Yamaha ring sets with those ink markings. What year YZ250?
2021 Model. Wonder what "IT" stands for?
Ok. I’ve often wonder what the “IT” marks mean but I could only guess. I do know Honda usually had an “N” to denote the top side of the ring. The most important thing is to put the “IT” mark facing upwards both rings.
Letters always facing up on rings as noted. Wouldn’t hurt to check ring end gap …make sure you seat the wrist pin circlips, I like to take a scribe after they are installed & push them within the groove to make sure they are all the way in…. Here is a photo of my friends KX125 piston, he states he had the circlips in the grooves, but I think he should have waited to smoke his weed until after the rebuild😂… make sure base gasket surface is clean, apply some grease or premix oil to dowl pins. Inspect reeds, install new plug. I also like to scuff cylinder lightly with a red scottbrite & wd-40. Good time to service the powervalves.
Post a reply to: Line Lengths on Piston Rings? YZ250 2-Stroke