Author Topic: Repairing a disk brake fluid reservoir window  (Read 72 times)

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Offline Mat1998

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Repairing a disk brake fluid reservoir window
« on: May 24, 2018, 10:28:07 AM »
Hey guys, so I've noticed the window on my rct 170s disk brake has corroded, is there any way I can replace the window or glue something in its place instead of buying an entirely new reservoir?


Offline Stanthescooterman

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Re: Repairing a disk brake fluid reservoir window
« Reply #1 on: May 24, 2018, 11:29:46 AM »
So, this is a very common problem.

Cheapest is to use your good old friend, Mr Pratley, to seal the hole completely

I use the steel epoxy.

The key to sucess is surface preparation - as with most such-like matters - so scrape out all the old crumbling plastic. I finish it off with a light Dremel, then fill the hole quick-quick & let it set.

Nobody really ever needs to see thru the little window anyway, most of the time, but if you do, then buying a complete new master cylinder assembly is the only answer. Generally your brake pads will wear out before you run out of brake fluid.

I've even seen somebody press a Welsh plug into the hole using a G-clamp, but whether that worked or not, I can't say.
« Last Edit: May 24, 2018, 12:35:35 PM by Stanthescooterman »
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Offline sharkcontrol

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Re: Repairing a disk brake fluid reservoir window
« Reply #2 on: May 25, 2018, 09:57:42 AM »
Haha i had the same problem and used a 5 cent coin and pratley steel-worked fine.scootersparesonline sells a brand new unit for R399 including vat,you can collect yourself or he can ship to you.
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Offline SA SCOOTERS

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Re: Repairing a disk brake fluid reservoir window
« Reply #3 on: May 25, 2018, 10:11:27 AM »
on some the glass is actually real glass and you can polish it up...See on youtube how they polish vehicle head lamps....and follow similar process.
Or ....plug it and forget it.
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Offline Stanthescooterman

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Re: Repairing a disk brake fluid reservoir window
« Reply #4 on: May 25, 2018, 10:54:08 AM »
Haha i had the same problem and used a 5 cent coin

now that's what I call an excellent 5-cent job - 'n boer maak 'n plan (wat werk)!
Previous bikes & scooters:
BMW C600 Sport
Kymco Grand Dink 250 (300),
BMW F650GS Dakar,
Gilera Runner 180,
Kymco Agility 125,
Kymco TB100,
Kymco Heroism KH125,
Honda CBX550FII,
Suzuki RG50 Gamma