M/C site glass replace

[Guest]

Any advice on a brake fluid proof glue to use. replacing deteriorated plastic site glass with a glass one.

[Steve]

I have never found a piece of glass the right size and shape, but have replaced several with a piece of Lexan.

The glue I used was a two-part epoxy. After removing the old window, dry-fit the new window to make sure it fits. Remove it, then mix the epoxy. Spread a thin bead on the ledge where the window will sit, place the window, then spread a bit more epoxy around the edge to make sure it's sealed. Even if it's quick-set epoxy, let it set overnight before turning the master cylinder upright and filling it with fluid.

.

[bwringer]

I really need to do this on my GS850 before something Very Bad happens... wasn't there a kit or someone selling new master cylinder sight glasses?

[tkent02]

Someone a year or so ago found some glass watch crystals that fit.

[OLDENUFF]

Thanks Steve. I got a glass one from New River Cycle in Dublin, Va. I put the caliper on it and it appears to be the right size. They say they can custom make any size you require.

[bwringer]

Ah, here they are:

http://newrivercyclesalvage.com/sight-glass.html

[greg78gs750]

i ordered a watch crystal from ebay, like 2 dollars or something. doing it this winter. +1 on the epoxy, i think even jbweld will work.

greg

[Steve]

If I didn't already have several small pieces of Lexan (acrylic will also work) sitting in the corner of the garage, I would go for the watch crystal.

What are they made of?

Do they withstand constant exposure to brake fluid?

How fragile are they, in case they get bumped?

.

[greg78gs750]

good questions. watch crystal material? i dunno, not plastic, some mineral. tough enough to survive on a watch? there is a more detailed thread around somewhere....http://www.thegsresources.com/_forum...=watch+crystal
towards the end there is a link to another website where the idea originated. i'll post to show how it went with mine, i need to make a thread with all my winter projects in it anyway.

greg

[scaylabs]

I did it with the watch crystal, even posted on that thread Greg mentioned
.
Something like this is what you want: http://www.ebay.com/itm/Lot-of-2-Mas...item53ebadab79

16.7 mm is the size.

[Steve]

THIS is similar to what I use.

Half the price, MANY more sight glasses possible, also many other uses.

Plus, ... you can go to your local Lowe's or Home Depot store and have it TODAY.

.

[5azzmonkey]

If I didn't already have several small pieces of Lexan (acrylic will also work) sitting in the corner of the garage, I would go for the watch crystal.

What are they made of?

Do they withstand constant exposure to brake fluid?

How fragile are they, in case they get bumped?

.

Not sure what they are all made of but the high end watches use sapphire.

-Dave

[redrum23]

Info sight glass replacement

Just thought I would share this... It helped me ALOT!!!

Thanks Pankake

http://www.thegsresources.com/_forum/showthread.php?t=172431&highlight=sight+glass+broken

[GS_Dave]

Shameless plug
I've been doing these for a couple of years now. Look like factory replacement, don't need glue

https://www.facebook.com/MasterCylinderWindowReplacements?ref=hl