Maintenance & Technical > KX500 Original

ring gap spec

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KXT500:
what are the specs for the ring gap? my gause is in .001" (not metric)
thankjs
chris

Paul:
There isn't one. You put them in and go, just make sure they are aligned with the little pins in the ring grooves or it's going to be a bad day ;)

KXT500:
so how do you know when to replace them? there has to be some spec. how would you know if the factory screwed one up? you would eat your cylinder. i would never build and engine and not check the end gap :shock:

Paul:
These aren't automotive engines, I asked the same question the first time I did a topend. I asked that question AGAIN when I went to MMI for the K-Tech program. There isn't an end gap setting. Your BEST indicator for replacement of rings in the topend is to use a compression testor and verify that the compression is within service limits (165psi - 110psi). I doubt the soft material the rings are made from will eat a Nikasil cylinder. At least I have never seen it happen.


--- Quote from: KXT500 ---so how do you know when to replace them? there has to be some spec. how would you know if the factory screwed one up? you would eat your cylinder. i would never build and engine and not check the end gap :shock:
--- End quote ---

ShanMan:
Asa mechanical engineer, I can assure you that the gap is not .001". I might buy .010" as a best case. The ring is most certainly softer than the cylinder by design. Of course, if the engine is allowed to run to lean too long, you will anneal the ring material and process of meltdown occurs.  :)

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