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Post Info TOPIC: Leaking sight glass on front brake reservoir.


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Leaking sight glass on front brake reservoir.
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The bike decided to take a nap on its right side and cracked the little see through window in the brake fluid reservoir. Has anyone had any luck replacing just the window or am I looking at a whole new reservoir part for this?



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How unfortunate. bleh

In all my years of riding motorcycles (passed my test in 1963) I have never heard of a broken sight window on a master cylinder. no

I have never seen a replacement window for sale but I have seen plenty of master cylinders, new and used. wink

I would advise a search in breakers' yards or eBlag as your answer.

OR - take a look on YouTube HERE

Good luck.

Martyn



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Budleigh Salterton. Devon



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Thanks for the youtube reference Martyn. Looks like a relatively simple job if I can come up with the correct size piece of lexan.



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Looks a fiddly job!. Id buy another one myself. don't have to be a TTR one...



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Hmm if I don't find a piece to replace the window do you have recommendations on any specific aftermarket brake reservoirs?



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RE: front brake window
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Yamaha WR 450/250,Yamaha Serrow, TTR600. Id be pretty confident any of those would fit...



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www.mrcycles.com/oemparts/p/yamaha/4gy-25870-02-00/master-cylinder-sub-assy

Gives you a couple of options when you search.



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Probably cheapest to get a used replacement from a breaker.

Brian



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Leaking sight glass on front brake reservoir.
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1993 Jap import ttr250 open enduro.

The fluid reservoir has been leaking fluid through the sight glass,does anyone know which other reservoirs can be fitted? I've tried finding an original but they are like rocking horse poo apparently.

 



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You could try this guy on ebay (I see he also has a rare oil cooler on the bike he's breaking)

www.ebay.co.uk/itm/Yamaha-TTR-250-TT250R-Breaking-1993-Road-Legal-Random-Bolt/252766030299%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20131017132637%26meid%3Dc629515ba6484f2bac90c61e1e225095%26pid%3D100033%26rk%3D5%26rkt%3D8%26sd%3D232155974026

Several also on ebay from the States. I've found recent transactions for parts in the USA on ebay to be suprisingly pain free!

Afraid I don't know what other models might fit, sorry. WR?



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Is it the front brake, if the sight glass is leaking?

I don't have one at the momentcry



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Replacement brake reservoir.
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Yes it's the front brake Steve,i had a look on the site but couldn't see any so i presumed you didn't have any.
Might just order a new one from the states. Thanks for the replies.

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Leaking sight glass on front brake reservoir.
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Hi Andy

I can happily order you a new one if needed.

Steve



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I think that when growing up, like a lot of boys, I loved taking things apart but maybe wasn't so good at putting them back together again. But it was a good way to learn how things are made.

So today I was looking at some front brake master cylinders that I had put back for refurbishing. One of these had a broken casting so was going in the bin but I couldn't resist trying to find out how the sight window was put together.

The window was really good and very clear. Older ones craze and go opaque. If I had known before that it was a push fit and sealed with an O ring then I might have been more careful in getting it out as I have another unit that ideally could do with a better window disbelief

Anyways up, just for fun, this is what it looks like stripped out!

Front brake reservoir window1.jpg

Front brake reservoir window2.jpg

 

PS I had a brainwave (rare event I know!). Mrs TTR is into making key rings and stuff using clear resin. I think I will dig the duff master cylinder out of the bin and see whether she can cast a resin sight glass into the case wink



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