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MC Sight Glass Replacement

Rich82GS750TZ

Rich82GS750TZ

Forum Guru
Super Site Supporter
Past Site Supporter
My Master Cylinder sight glass is brown, cracked, and unreadable unless the light hits it just right. I want to replace it. Found this on eBay.
https://www.ebay.com/itm/1PC-Motorc...rentrq:10f0a63a1680aadc1a0fc5f1ffec004e|iid:1

q4GJex6m.jpg


Price is right. I think it's the right size. 18mm? Anyone else used this? How hard a job is it?

Also, while I'm doing this, I know I should replace the brake line. It's probably 36 yrs old and on borrowed time at best. Should I go with an OEM line or braided. Anyone know the exact size? Do the numbers in this pic tell me anything about size?
8zWn0NMm.jpg

I know the top banjo is a 90 deg. the end that goes into the caliper is straight.

Last question on this topic. Rebuild the piston or "if it ain't broke, don't fix it."

TIA
 
I've used that sight glass. The hardest part is getting the old one out. I can't remember, but I think I used a torch and melted it out. The new one I pressed in with a vise. I'll be doing another one in bike #2 soon.
 
Have you tried cleaning the window with brake clean?
Braided brake lines only
Rebuild the mc, brakes are life
 
Thanks for the replies. I’ll buy a braided cable once I get it off and measure it.

And, absolutely right. Momentary lapse on my part on even considering not rebuilding the MC while it’s off. Brakes ARE life. On that, do I just buy all the parts on the fiche from BB, Babbitts, other? Or is there a rebuild kit that I should look for?
 
Regarding the sight glass: I have some 1/8" thick Lexan here. I just cut off a small piece, round it off so it's just a bit smaller than the hole, apply a small bead of epoxy around the ledge, set the Lexan in place, then fill in the gap around the edge with some more epoxy. Let it set for a day before moving it, it's good to go.

.
 
Thanks Steve. If the $.99 I just spent on eBay doesn’t pan out, I’ll try your lexan/epoxy method.
 
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