Thumper Club Forum

Technical => Bike Problems/Questions => Topic started by: guest1130 on February 21, 2011, 11:39:35 PM

Title: XBR hydraulic brake restoration - master cylinder question
Post by: guest1130 on February 21, 2011, 11:39:35 PM

I cleaned my master cylinder thoroughly and began to doubt myself upon reassembly. Which way do the cups go on the piston? Do they go as I recall: both cups facing the thread-part of the piston (meaning the cups "open faces" are facing each other)?

My piston boot was torn to bits and I have no idea on where to find one locally (in Finland), so I think I'll try to manage without one.

Title: Re: XBR hydraulic brake restoration - master cylinder question
Post by: Ian on February 25, 2011, 10:11:17 PM

Can you make a boot out of an old pushbike innertube, using some method of clipping it to both cylinder and rod using tiewraps or something similar.....

just a thought.....


HTH

Ian :)

Title: Re: XBR hydraulic brake restoration - master cylinder question
Post by: pigafetta on February 26, 2011, 02:35:39 PM

I made one for my CB9 out of the neck bit of a balloon. It looked crap cos it was bright blue but it stayed in there and did the trick. I've never managed to get one out without tearing it and you can't buy them on their own, you have to get the whole bloody piston kit.

Dave B

Title: Re: XBR hydraulic brake restoration - master cylinder question
Post by: tommy on February 27, 2011, 09:24:56 AM

hi kaff   one cup faces the threaded part of the piston and the next one faces the spring  ...tommy

Title: Re: XBR hydraulic brake restoration - master cylinder question
Post by: guest1130 on February 28, 2011, 11:16:37 PM

Thanks Tommy - I felt that might be the case but wasn't quite sure.