Sticking Brake

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Drago
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Current Ride: Daelim S1 125
Location: Devon
England
Sticking Brake

Post by Drago » Thu Dec 14, 2017 1:44 pm

As the title says I'm frequently having trouble with my brake pads sticking. I live in a fairly rural area and travel down muddy lanes five days a week. This crud is getting into the calliper and causing this issue. Bizarrely on my SYM Joymax the front brake suffers the most, the rear does not on my previous SYM GTS it was the rear that tended to stick rather than the front :? . Now this is of course wearing out the pads quickly and of course reducing performance/mpg.

So what's the best way to prevent/fix this? Clean the callipers daily? Remove them and clean frequently? I did use a brake cleaner but this is expensive and didn't seem to help. I'm not to mechanically talented but I'd rather sort this issue out myself rather than having to put up with rapidly wearing pads/poorer performance and paying a mechanic. Any help/advice would be appreciated.
Current rides

SYM Joymax Sport 300i 2016-
SYM Symphony ST 200i 2018-


Past rides - Daelim S1 2014-2017 SYM GTS 250i 2008-2015. SYM Tonik 2012 SYM Megalo 2006-2008 SYM DD50 2004-2006 Honda C90 2011 Malaguti Madison 2010 Burgman K3 400 2013-2014

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Funkycowie
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Re: Sticking Brake

Post by Funkycowie » Thu Dec 14, 2017 2:27 pm



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Past Bikes: Piaggio B125, Gilera Nexus 500, TMax MK3 in White, TMax MK3 in Yellow...

MrGrumpy
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Current Ride: T-max mk6
Location: Teesside UK
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Re: Sticking Brake

Post by MrGrumpy » Thu Dec 14, 2017 3:05 pm

I suspect its the salt that's causing more of a problem than 'mere' crud. Apart from cleaning, the brakes could probably do with a full on dismantling and service.

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roadster
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Joined: Tue Sep 13, 2016 2:06 pm
Current Ride: Kymco AK550
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Re: Sticking Brake

Post by roadster » Sat Dec 16, 2017 4:13 am

First remove the pads and spray generously inside callipers with something like rubber grease or even wd40. This is just to clean out the general debris before pushing the pistons in until nearly flush. then coat the inside of the pistons ( if they are the hollow type ) with Coppa slip or a similar copper based grease. Also apply this grease to all the point where the pads touch the calliper lugs but make sure the surfaces have no residual mud or corrosion by scraping them clean first. Coat the back of the pads with Coppaslip and also try to smear a little on metal edges that need to slide against the calliper. The pads should fit into place with no force required. Grease any anti rattle springs and also generously coat the retaining pins. After everything is refitted squeeze the lever to get the pads back in contact then rotate the wheel a couple of times. Check to see that no grease has found its way onto the disk and wipe it clean if necessary. In fact this type of grease doesn't hurt the contact surfaces as much as you might think so the odd fingerprint doesn't adversely affect braking efficiency.

I find this treatment only needs doing once a year in the condition you describe.
Located on UK South Coast
Rides Kymco AK550 previously Kymco Downtown 300i ABS and Triumph Street Twin.

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2wheelover51
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Current Ride: TMax 500Y
Re: Sticking Brake

Post by 2wheelover51 » Sat Dec 16, 2017 5:23 am

Similar to Roadster. I take the calipers off the discs and clean with brake cleaner and ACF50 on a rag, making sure to get into all the nooks and crannies. Once they're clean I coat the pistons with red rubber grease. I do this about 3 or 4 times a year. This is fine for my light usage but not sure if it would keep the calipers ok with daily usage in really muddy conditions. It might need to be done monthly etc.
Bike/scooter calipers should come with rubber boots like car calipers. Maybe if you could find something that would fit, it might be the way to go, or else rig some sort of deflectors to keep the crap out.
Some available here: https://www.motorcycleproducts.co.uk/ca ... 8_117.html
They look model-specific but maybe some could be adapted to suit if you look around.

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Ralph
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Joined: Fri Jun 01, 2012 7:20 am
Current Ride: Yamaha X-max 300 300
Location: Near Fleetwood
England
Re: Sticking Brake

Post by Ralph » Sat Dec 16, 2017 6:26 am

What I do and I don't recommend it is push on the caliper with my knee
pushing the pistons back this keeps them free to move but you must
pump the pistons back out with the brake leaver after or you wont have
brakes first time you pull the leavers.
The way to start is in the post above get them working right and clean to start with.
Ralph
Nr Fleetwood
Yamaha X-max 300
Ariel NH 350
Ariel WNG 350


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Drago
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Current Ride: Daelim S1 125
Location: Devon
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Re: Sticking Brake

Post by Drago » Sat Dec 16, 2017 2:08 pm

Well I tried using hot soapy water as shown in the 2nd video Funkycowie posted. I don't have access to a hose at present so instead just to try I used a 2l hand pump bottle I got at a garden centre. I gave the disc and caliper a good blast and found that this helped clean out/free up the brake. Literally it was near jammed on in the morning, I could barely turn it by hand. But after emptying the bottle it was turning a lot more freely. The scoot is due for a service soon anyway and the pads will still need replacing this time. I'll now stick to rinsing the brakes frequently with hot soapy water to prevent the issue happening again. I never thought of using something as simple as hot soapy water before.
Current rides

SYM Joymax Sport 300i 2016-
SYM Symphony ST 200i 2018-


Past rides - Daelim S1 2014-2017 SYM GTS 250i 2008-2015. SYM Tonik 2012 SYM Megalo 2006-2008 SYM DD50 2004-2006 Honda C90 2011 Malaguti Madison 2010 Burgman K3 400 2013-2014

Whatsisname
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Re: Sticking Brake

Post by Whatsisname » Sat Dec 16, 2017 3:45 pm

I like the garden pump/bottle idea, It struck me that the brush in the video wouldn't get right into the space behind the pad. Now I've got to decide whether to dump the 2 litres of weedkiller in the sprayer, or buy a second one!
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My natural exuberance spills out all over the place!

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Funkycowie
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Re: Sticking Brake

Post by Funkycowie » Sat Dec 16, 2017 4:33 pm

I use an 8 litre Hozelock Killaspray and a bucket, where I wash my scoot I have no water access so use the killaspray to wash and rinse it. Soapy water in the spray at firs,t then rinse out the sprayer with a bit of water from the bucket, finally refill it fully from the bucket and spray clean.
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Past Bikes: Piaggio B125, Gilera Nexus 500, TMax MK3 in White, TMax MK3 in Yellow...


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