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Author Topic: Master Cylinder question  (Read 699 times)

kingblc

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Master Cylinder question
« on: June 24, 2020, 12:36:24 AM »
Hello, 
I am new to scooters and have a 2014 Agility 50.  I noticed the diaphragm looking thing on the front seems to be damaged.  What is this thing, and is this a concern?  I have attached a picture with an arrow pointing to what I am talking about
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CROSSBOLT

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Re: Master Cylinder question
« Reply #1 on: June 24, 2020, 01:23:49 AM »
That is a "sight glass" to let you see what the quantity of brake fluid is inside.
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Karl

Three motorcycles 1960-1977 (restored a 1955 BSA)
Agility 50
Yager 200i
Downtown 300i
Navy tech, Ships Engineer, pilot and aircraft mechanic

kingblc

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Re: Master Cylinder question
« Reply #2 on: June 24, 2020, 01:27:39 AM »
Thank you.  So it being damaged is a bad thing.  I'll have to replace that right away. 
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eamartin

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Re: Master Cylinder question
« Reply #3 on: June 24, 2020, 02:05:13 AM »
Damaged in what way?  Is it cracked?  Is it leaking?
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kingblc

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Re: Master Cylinder question
« Reply #4 on: June 24, 2020, 02:59:21 AM »
It is cracked, and looks like it was pushed in.  It is wet around the area, but not leaking.
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eamartin

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Re: Master Cylinder question
« Reply #5 on: June 24, 2020, 11:24:25 AM »
It could get worse and begin leaking.  If it's not leaking and your brakes are working it would seem you are okay.  Loss of fluid will of course lead to braking issues.  And if brake fluid drips on a painted surface the paint will be damaged.  Some manufacturers list a replacement sight glass for the master cylinder.  Kymco does not show that part as available (only the complete master cylinder).  Keep an eye on it.
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mumof7

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Re: Master Cylinder question
« Reply #6 on: October 03, 2020, 04:33:44 AM »
I have the same problem on my 2015 agility..the viewing window has completely disintegrated....looks like a whole new master cylinder.  :-\
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