Other drain plug, that isn't?

[Trabian]

I removed the wrong drain plug with a 14 mm wrench and out came a spring and plunger. The correct drain plug has a 17mm hex head, I now know.
I don't have a shop manual or diagram. Help?

 

[timmmy todd]

did same thing . plunger ,spring washer. manual says add 4.0 cm oil into push rod .before assembly

 

[dmonkey]

Yep, it's part of the cam chain tensioner assembly.

Diagram here:

https://www.revzilla.com/oem/honda/2021-honda-trail-125-abs/cam-chaintensioner?submodel=ct125aac

You can find a service manual download and parts diagram here:

Honda Trail 125 CT125 PDF Manual Downloads - Owners, Service, Parts Catalog

Owner's Manual: A booklet that is included with the purchase of a new Honda Trail 125. The Owner's Manual may be located inside the black toolbox located on the left side of the bike below the rear carrier rack. A hex key for opening the tool box can be found clipped to the top of the fuel tank...

hondatrail125.com

 

[Trabian]

Thank you very much, both of you. Now I know!

 

[SneakyDingo]

Removed wrong underside engine bolt - Help

Help ! ! I accidentally removed the wrong underside engine bolt (14mm) when performing the first oil change on my CT125. A spring and smallish round bar with holes fell out. what is the order / procedure for putting them back properly ? Thanks for any assistance. Rich

hondatrail125.com

It's happened before, it'll happen again!!!

 

[Trabian]

Plunger goes in first rubber tip up. Then spring with small end up and screw the plug back in. See above diagram.

 

[t3ra_n0va]

Hey, I just did the same thing. Is it the same for a honda cub c125? I am having a hard time finding info.

 

[dmonkey]

Yes, the Super Cub has the same engine design and camchain tensioner.

 

[t3ra_n0va]

did same thing . plunger ,spring washer. manual says add 4.0 cm oil into push rod .before assembly

How do you put oil into the rod? it's hollow with holes in it.

 

[dmonkey]

There is a plug bolt that can be removed to prime it with oil. Honda recommend replacing the sealing washer when you do that.