1979 CM185 shifter shaft seal leaking

[goldwing55706]

I absolutely love my 1979 CM185 & hate to see oil dripping down the side stand. It looks like the shifter shaft seal is leaking. Is this seal easily replaceable after taking off the shifter engine cover? Where can I buy this seal?

 

[ancientdad]

I absolutely love my 1979 CM185 & hate to see oil dripping down the side stand. It looks like the shifter shaft seal is leaking. Is this seal easily replaceable after taking off the shifter engine cover? Where can I buy this seal?

You should be able to easily change the shift shaft seal (#6) after removing the front sprocket cover.

You find these things using the tips in this thread, part of your Welcome Package of helpful links you got in my reply to your introduction.

Tips for identifying and locating parts

Lots of people new to the vintage Honda motorcycle world are unfamiliar with how to identify the parts they need and where to look for them. The question is often asked: "Where can I find a (part name)?" The first step to finding any part for any of our favorite Hondas is to properly identify...

www.vintagehondatwins.com

Here's the seal

https://www.partzilla.com/product/honda/91208-KB4-671?titan_sku=91208-KB4-671

And here's the parts fiche online showing it

https://images.cmsnl.com/img/partslists/honda-cm185t-twinstar-1979-z-usa-crankcase_bighu0114e9013_349b.gif

 

[EzPete]

Seal is readily available from Honda - part number 91208-KB4-671. If you have a Honda powersports dealer near you, I'd see if they can get this without having to pay more for shipping than the seal itself.

Replacement is pretty straightforward - wood screw carefully through the center of the seal ring, pry it out, clean the seal area and press the new seal in (a length of 3/4" or 1" PVC works really well here). I prefer a super light coat of hondabond on the outer edge of the seal surface on this one, since it seems to love to fail regardless of the bike model.

 

[esh21167]

Seal is readily available from Honda - part number 91208-KB4-671. If you have a Honda powersports dealer near you, I'd see if they can get this without having to pay more for shipping than the seal itself.

Replacement is pretty straightforward - wood screw carefully through the center of the seal ring, pry it out, clean the seal area and press the new seal in (a length of 3/4" or 1" PVC works really well here). I prefer a super light coat of hondabond on the outer edge of the seal surface on this one, since it seems to love to fail regardless of the bike model.

I found that using 2 screws makes it a bit easier to pull/wiggle out. A deep well socket can also work as a driver. YMMV.