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Tires, Suspension & Handling Sticky to slippery tire talk

 
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post #1 of 3 (permalink) Old 03-18-2017, 10:59 PM Thread Starter
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Question Another RCS19 question

Good evening ladies and gents,

I've recently decided to get a dedicated track bike and came across a very well-sorted CMRA-spec'ed bike.

However, I am fairly new to brake upgrades and the bike came with RCS19 brake MC with steel braided line. The last owner changed the fluid out prior to delivering, however, since I never had experience with the setup, this is my question: Is it supposed to feel "spongy" when apply braking? I had on either 18/20mm and the 18mm feels a little more instant (still spongy). Perhaps I need to reflush the system? I did take a test-ride around the neighborhood to try the GP shift/braking feels.

Also, in complete quiet environment, I could head a small "air leaking" sound when applying the brake, parked--so it goes back to do I need to redo the fluid and the next step, is possible damaged MC?

Thanks for reading.

Cheers
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post #2 of 3 (permalink) Old 03-18-2017, 11:31 PM
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the air leaking sound is probably from the rubber boot that protects the plunger.



the sponginess is probably air in the system.



try bleeding from the nipple on the master cylinder a couple times. air in the system tends to end up there.
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post #3 of 3 (permalink) Old 03-19-2017, 08:00 AM Thread Starter
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Quote:
Originally Posted by wibbly View Post
the air leaking sound is probably from the rubber boot that protects the plunger.



the sponginess is probably air in the system.



try bleeding from the nipple on the master cylinder a couple times. air in the system tends to end up there.
Thank you, sir.

Will post update
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