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Post subject: 31k master cylinder replacement sight glass headache ):
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tomma  Find me a Road! Joined: 01 Dec 2005 Total posts: 24 Location: Zurich, Switzerland |
Hello again boys & girls,
have any of you ever been able to change the sight glass on the front brake master cylinder on a  ?
Just been quoted £230 for a complete new one! and all I need is a clear leval sight glass.
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Posted: Fri May 16, 2008 2:25 pm
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russ35031 Daily Burner Joined: 28 Oct 2007 Total posts: 129 Location: Northants UK |
Ouch, £230. bought a NOS from Rob for about £110 last month
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Posted: Fri May 16, 2008 5:15 pm
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Post subject: Re: 31k master cylinder replacement sight glass headache ):
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Shytalk Regular Racer Joined: 13 May 2005 Total posts: 311 Location: Staffordshire |
| tomma wrote: |
Hello again boys & girls,
have any of you ever been able to change the sight glass - all I need is a clear level sight glass. |
Can't be done on the 31K's  you either need to buy a new one; or get a used one I'm afraid.
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Posted: Fri May 16, 2008 5:58 pm
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Thrasherg Powerband Master Joined: 18 May 2007 Total posts: 627 Location: Austin, Texas |
It can be done, I did it, unfortunately the perspex that I bought to make the new window immediately turned milky white when the brake fluid came in contact with it!! You can push the old window out and fit a new one, but need to find the correct plastic for the replacement window!!
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Posted: Fri May 16, 2008 6:21 pm
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RSRFind me a Road! Joined: 22 Feb 2007 Total posts: 13 |
Try USA ebay member fngster, he has replacement sight windows in various sizes.
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Posted: Sat May 17, 2008 9:03 am
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Vindaloobeast Rear-wheel Steering! Joined: 25 Aug 2005 Total posts: 2609 Location: Gloucester |
I just bought a new 4L0 one for 118 pounds..brakes are rock solid and I can easily lock up the front with just 1 finger.
Beast.
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Posted: Sat May 17, 2008 9:15 am
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Post subject: Re: 31k master cylinder replacement sight glass headache ):
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rd84Regular Racer Joined: 05 Aug 2003 Total posts: 408 Location: Leicestershire |
Try Fowlers of Bristol. I got a brand new front master cylinder for my RD500 a couple of years ago for £75 - so your quote for £230 is way out even allowing for inflation and exchange rates. - I had the same problem as you - however I didn't have the nerve to glue a new window in - I had this picture of braking for a sharp bend and all the fluid spilling out of a windowless mastercylinder !!! 
Cheers
Paul
| tomma wrote: |
Hello again boys & girls,
have any of you ever been able to change the sight glass on the front brake master cylinder on a ?
Just been quoted £230 for a complete new one! and all I need is a clear leval sight glass. |
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Posted: Sat May 17, 2008 3:48 pm
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Post subject: Re: 31k master cylinder replacement sight glass headache ):
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VindaloobeastRear-wheel Steering! Joined: 25 Aug 2005 Total posts: 2609 Location: Gloucester |
| rd84 wrote: |
Try Fowlers of Bristol. I got a brand new front master cylinder for my RD500 a couple of years ago for £75 - so your quote for £230 is way out even allowing for inflation and exchange rates. - I had the same problem as you - however I didn't have the nerve to glue a new window in - I had this picture of braking for a sharp bend and all the fluid spilling out of a windowless mastercylinder !!!
Cheers
Paul
| tomma wrote: |
Hello again boys & girls,
have any of you ever been able to change the sight glass on the front brake master cylinder on a ?
Just been quoted £230 for a complete new one! and all I need is a clear leval sight glass. |
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Mine did just that..get it right or nastyness might come your way.
Beast.
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Posted: Sat May 17, 2008 4:24 pm
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Bare All-gear Wheelie! Joined: 28 Jan 2006 Total posts: 1818 Location: Vancouver Canada |
IF.. it's the non square top later stlye MS then this is the Yamaha Current pricing :
$90. u$ Complete unit
http://www.worldofcycles.com/fiche_section_detail.asp
Look under 1986 Yamaha FZ600s.. Front master cyl diagram
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Posted: Sat May 17, 2008 7:42 pm
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GH Suburban Commuter Joined: 16 Apr 2005 Total posts: 72 |
After destroying my sight glass when prising it out - I laser cut some discs from clear acrylic and secured them in the hole using clear silcone sealant. So far it's lasted a year with no leaks, no discolouration and even looks okay. I can send photos if you like.
That price is way too high - I'm sure I paid less than £100 for an LC2 master cylinder less than a year ago from Fowlers.
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Posted: Sun May 18, 2008 7:24 am
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powervalve 350 Throttle Demon Joined: 04 Aug 2003 Total posts: 3027 Location: Hull UK |
I recently bought a F2 master cylinder for my hybrid- think it was about £56 from Fowlers.
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Posted: Sun May 18, 2008 11:10 am
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| xen-uno Joined: 27 Jul 2005 Total posts: 844 |
Is the PJ1 Case/Frame paint resistant enough for master cylinder usage?
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Posted: Sun May 18, 2008 3:39 pm
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