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1988 FLSTC spongy front break question

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  #1  
Old 08-29-2019, 07:18 AM
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Default 1988 FLSTC spongy front break question

Hello,
So front break very spongy, when pulling in the front break lever can touch the grip.
So went old skool pulled in the lever attached to the grip over night next day it was nice and tight lots of pressure in the line. Morning after back to the same spongy.
Do I assume bleeding is the next step to get air out and or a complete change of break fluid to see it that works. Dont think it has been changed in many years

Thanks
 
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Old 08-29-2019, 09:08 AM
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If the zip tie the lever over night is not working / holding. The next step is bled the line and IMO if your going to bleed it on an older bike that has not had a fluid flush / exchange just go ahead and completely change out the fluid, once you start bleeding its just more fluid.

Ive always used a vacuum pump (mity vac) or Harbor Freight has a kit that is cheap and will work easily on the bike or car. https://www.harborfreight.com/brake-...kit-63391.html

If that doesnt hold firm its master cyl time
 
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Old 08-29-2019, 10:20 AM
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Thanks Xaran.... hopefully not the Master!!!
 
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Old 08-29-2019, 10:21 AM
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I would change the pads to new BEFORE I did a fluid flush. Then do the full fluid change, then at least you know all of that is 100%. If still spongy, then chase the Master Cylinder. Good luck.
 
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  #5  
Old 08-29-2019, 10:36 AM
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At the minimum bleed the system, but if it has not been done in a long time, you might as well flush the fluid, make sure to use DOT 5.

Consider going through the complete system, rebuild caliper and master cylinder, replace the brake hose if it is original.

When rebuilding caliper, use OEM parts, aftermarket stuff is cheaper, but quality can be a crapshoot.
 
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