Topic: Identify these orings

[Ryan66]

My motor doesnt appear to have any leaks upon inspection. Gonna open it up just to inspect everything so i may as well replace gaskets and what not. This kit doesnt have the pucks but do the orings in the kit replace them? Know thats a known issue for leaks.
https://4into1.com/top-end-gasket-set-honda-cb500k-cb550f-cb550k-1971-1978/

[Alan F.]

I am very much not a 550 guy but I just took a minute to look up all of those o-rings on partzilla.com and verified that you still need six RUBBER, SEALING
91318-300-013



https://www.partzilla.com/product/honda/91318-300-013?ref=5323a0e1d4cd0343c86281a413773227ce14e842

Avoid aftermarket versions for fitment reasons.

Edit: If you buy that kit I'd write a review to help the next guy.

[Ryan66]

I am very much not a 550 guy but I just took a minute to look up all of those o-rings on partzilla.com and verified that you still need six RUBBER, SEALING
91318-300-013



https://www.partzilla.com/product/honda/91318-300-013?ref=5323a0e1d4cd0343c86281a413773227ce14e842

Avoid aftermarket versions for fitment reasons.

Edit: If you buy that kit I'd write a review to help the next guy.

Thanks Alan. I already had them in my cart from partzilla just in case. Wondering what the bigger orings are for then. The little ones are valve guide seals.

[Alan F.]

The 12 o-rings are all one part number, 8 are for valve adjuster caps and 4 are for the carburetor manifolds.

The big orange ones go at the bottom of the cylinder sleeves where they meet the jugs.

[Ryan66]

When you say valve adjuster caps you mean the tappet covers?

[Alan F.]

Yup.

[bryanj]

The 8 green O rings alongside the valve stem seal go in file 13 under R as they go on the outside of valve guides before fitting in head