Front Master Cylinder weeping?

[Guest]

I just installed my new stainless steel brake lines last night. The calipers and master cylinder are all rebuilt with OEM parts. The bleeding went well with a decent amount of lever height (although I do not remember where this bikes brake handle sat originally as I have not ridden it in ~10 years) . I pulled the handle in and taped it open over night just to be sure to get all the air out.
I noticed a drop or two of brake fluid weeping from a little hole/port underneath the master cylinder right next to the brake light switch mechanism. What is this hole/port for and is this normal?

Thanks,
Dave

[hampshirehog]

It's not normal - fluid shouldn't leak out anywhere. My guess is you have a leak on the piston seal.

[Guest]

I'll take it apart tomorrow and take some pics too.

Thanks,
Dave

[Guest]

It looks like I must have scratched the plunger when installing the snap ring. I was trying to use a regular pair of snap ring pliers and could not reach the clip I finally bought a long nose pair but the damage was already done.

-Dave