Rings

When deciding whether a engine needs bored or just rings, what is the maximum gap between the end of the rings inside the cylinder on a 99cc Honda?

SRTsFZ6 2024/10/30 09:51:54

As we don't know if this is a 2 or 4 stroke engine, model #, type- weed-eater, generator, outboard, etc, it'd probably be best to purchase / obtain the shop manual for that particular engine and check spec's there....

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SRTsFZ6 2024/10/30 09:54:57

If just the rings are worn, no cylinder damage, you may not need to bore the cylinder.

A new set of rings (if the old ones are out of spec) may bring you back into spec.

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Thesmallenginehobbyist76 2024/11/04 10:30:54

The cylinder is not damaged. This is a 4 stroke dirtbike engine. The model is 1985 xr100r. Thanks

SRTsFZ6 2024/11/04 13:27:06

A quick search:

https://www.scribd.com/document/397543184/9495510-Honda-Xr80r-Xr100r-Service-Repair-Manual-1985-1997-Xr80-Xr100-1

.012" -.015"

Ring end gap:.012" -.015" Valve clearance: Intake:.002" Exhaust:.003" Piston to head clearance:.040"

Thesmallenginehobbyist76 2024/11/04 14:55:41

Thank you!

Rings

Rings

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