Cleaning master cylinder

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daxman
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Posts: 349
Joined: Thu Nov 07, 2013 1:59 pm
Country: United Kingdom
Suzuki 2-Strokes: A100 GT250 & 4t Yams!
Location: Brussel County, England

Cleaning master cylinder

Post by daxman »

Hi All

I'm transplanting a GP100C disc front end onto the venerable A100 I have been messing about with.
Not really investigated the m/c until last night when I took the reservoir cap off and saw an unholy amount
of cr@p and brown mess. I clean out what I could and swilled out the reservoir with fresh fluid but only small
dribbles of fluid come out when I pump it (no resistance by the way). I might end up buying
a generic replacement m/c and lever but before that I figured I'd try and clean the guts of it.
Is there a magic circlip at the lever end under the boot ? Strangely the CMSNL diagram doesn't show anything..
and it was getting dark last night when I was fiddling with it

http://www.cmsnl.com/suzuki-gp100-1978- ... IG-58.html

All the best

JS
Craig380
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Joined: Mon Dec 01, 2008 2:52 am
Location: Manchester, UK

Re: Cleaning master cylinder

Post by Craig380 »

Not sure with your specific M/C but if you remove the boot at the lever end and shine a light, you'll probably find a circlip that's WAY buried in there. You need a pair of long, straight, thin circlip pliers.
1976 GT380 - wounded by me, and sold on
2006 SV650S - killed by a patch of diesel and a kerb in Feb 2019
2017 SV650 AL7 - naked and unashamed
daxman
To the on ramp
Posts: 349
Joined: Thu Nov 07, 2013 1:59 pm
Country: United Kingdom
Suzuki 2-Strokes: A100 GT250 & 4t Yams!
Location: Brussel County, England

Re: Cleaning master cylinder

Post by daxman »

Thanks for the reply - Manged to prise out old boot (in a dozen pieces :roll: ) and peered down the recess but nothing that look like a circlip. I'm betting though its corroded to b*ggery. Will persevere a little longer..

Cheers

JS
sportston
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Joined: Wed Jul 10, 2013 12:04 pm
Country: England, UK
Suzuki 2-Strokes: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S

Re: Cleaning master cylinder

Post by sportston »

you might find it easier and cheaper to get a new cb400 master cylinder off ebay for £14.50 like this
http://www.ebay.co.uk/itm/Front-Brake-M ... 4170d1bac7
or if you're willingto wait for it to come from china it costs on £12.50
Both come with new lever and brake switch and include postage.
http://www.ebay.co.uk/itm/Front-Brake-M ... 4168da5968
Now you can't expect to get better than that for value for money. It might spoil the originality but it will fit and work fine. I got one on my gt380.
daxman
To the on ramp
Posts: 349
Joined: Thu Nov 07, 2013 1:59 pm
Country: United Kingdom
Suzuki 2-Strokes: A100 GT250 & 4t Yams!
Location: Brussel County, England

Re: Cleaning master cylinder

Post by daxman »

Brilliant thanks - think that's what I'll do (new M/C that is)

In daylight I could just make out something that looked a bit like a circlip but really for the money
it doesn't seem worth pursuing further.

Thanks all :up:

JS
sportston
Expert racer
Posts: 1155
Joined: Wed Jul 10, 2013 12:04 pm
Country: England, UK
Suzuki 2-Strokes: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S

Re: Cleaning master cylinder

Post by sportston »

Glad to be of help. It definitely makes life a lot easier than having to recon the standard one that isn't very good at the best of times so I've been told.
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