Front Brake caliper leaking fluid - SV650.org

Jason H · 17-06-13, 06:18 PM

I think the seals on the pistons are gone on one caliper, it is leaking a lot of fluid to the extent that there is basically none left in the reservoir.

Need to sort this before the AR.

It is either the pistons or the line. Anything else it could be?

Also I'm looking at pistons and seals on wemoto, would you recommend Suzuki or would I be ok with pattern parts?

The pads are probably saturated so I take it they'll need to go?

Help please, don't want to miss the AR...

J

dirtydog · 17-06-13, 06:23 PM

Is it obvious where its leaking from?

Pattern parts from wemoto will be fine, I've used them many times with no problems.

The last leaky caliper I had was down to the copper washers on the banjo bolt

Jason H · 17-06-13, 06:40 PM

It is not the banjo or the line, beyond that I 'm not 100% sure where on the caliper it can leak from.

Which would be more advisable out of the following in your opinion?

http://www.wemoto.com/bikes/suzuki/sv_650_k5/05/picture/rebuild_kit_full_seals_caliper_-_front/

http://www.wemoto.com/bikes/suzuki/s...front_caliper/

http://www.wemoto.com/bikes/suzuki/s...l_front_brake/

Cheers for any and all assistance.

I'll try to get a photo up shortly

J

17-06-13, 06:44 PM

If it's not leaking from the banjo then it can only be the piston seals. You can use a blowtorch to burn the dot fluid out of the pads but it is recommended to buy new ones. Since you're pulling the caliper apart anyway it's a good excuse to clean them up and give them a refresh.

Edit:
And I've used pattern seals in the last set of calipers I rebuilt and so far no problems. You won't need new pistons unless the originals are scored (highly unlikely) so just got for new main and dust seals.

dirtydog · 17-06-13, 06:48 PM

As murley says if its not the banjo or line then its got to be the piston seal. Get the caliper off and have a good look at it.
As for what to order, that depends on what you find when you inspect the caliper

sniff · 17-06-13, 08:56 PM

what about the bleed nipple. I had a problem with mine a few weeks ago and found out this was the reason. Changed nipples and job done.

rictus01 · 17-06-13, 09:15 PM

if the piston is weeping then it's go passed both seals, this is normally down to either very poor maintenance or badly scratched pistons, dependent on severity a strip clean and libreal application of RRG can minimize for a while, but really once the damage is done, replacement is the only solution.

17-06-13, 06:18 PM	#1
Jason H Member Join Date: Mar 2013 Location: Sussex...Previously a Somerset Lad Posts: 276	Front Brake caliper leaking fluid I think the seals on the pistons are gone on one caliper, it is leaking a lot of fluid to the extent that there is basically none left in the reservoir. Need to sort this before the AR. It is either the pistons or the line. Anything else it could be? Also I'm looking at pistons and seals on wemoto, would you recommend Suzuki or would I be ok with pattern parts? The pads are probably saturated so I take it they'll need to go? Help please, don't want to miss the AR... J __________________ Naked K5 - Now Red with sexy stripes!! Mods: Renthal Flat bars, 's' clutch perch, GSXR front master cylinder, CNC shorty levers, Tail Tidy, Fuel Mini S/S Slip-on, 15/47, 's' Swing-arm, Pillion seat cowl, GSXR 750 front end, CNC polished top yoke, R6 Throttle tube, GSXR rear shock Rotate your Owl

17-06-13, 06:23 PM	#2
dirtydog Knob faced knobster Mega Poster Join Date: Jan 2005 Location: Haslemere Posts: 5,419	Re: Front Brake caliper leaking fluid Is it obvious where its leaking from? Pattern parts from wemoto will be fine, I've used them many times with no problems. The last leaky caliper I had was down to the copper washers on the banjo bolt __________________ 2001 SV650 in shimmerin green, Not broken anymore Last edited by dirtydog; 17-06-13 at 06:26 PM.

17-06-13, 06:40 PM	#3
Jason H Member Join Date: Mar 2013 Location: Sussex...Previously a Somerset Lad Posts: 276	Re: Front Brake caliper leaking fluid It is not the banjo or the line, beyond that I 'm not 100% sure where on the caliper it can leak from. Which would be more advisable out of the following in your opinion? http://www.wemoto.com/bikes/suzuki/sv_650_k5/05/picture/rebuild_kit_full_seals_caliper_-_front/ http://www.wemoto.com/bikes/suzuki/s...front_caliper/ http://www.wemoto.com/bikes/suzuki/s...l_front_brake/ Cheers for any and all assistance. I'll try to get a photo up shortly J __________________ Naked K5 - Now Red with sexy stripes!! Mods: Renthal Flat bars, 's' clutch perch, GSXR front master cylinder, CNC shorty levers, Tail Tidy, Fuel Mini S/S Slip-on, 15/47, 's' Swing-arm, Pillion seat cowl, GSXR 750 front end, CNC polished top yoke, R6 Throttle tube, GSXR rear shock Rotate your Owl

17-06-13, 06:44 PM	#4
Murley. Guest Posts: n/a	Re: Front Brake caliper leaking fluid If it's not leaking from the banjo then it can only be the piston seals. You can use a blowtorch to burn the dot fluid out of the pads but it is recommended to buy new ones. Since you're pulling the caliper apart anyway it's a good excuse to clean them up and give them a refresh. Edit: And I've used pattern seals in the last set of calipers I rebuilt and so far no problems. You won't need new pistons unless the originals are scored (highly unlikely) so just got for new main and dust seals. Last edited by Murley.; 17-06-13 at 06:46 PM.

17-06-13, 06:48 PM	#5
dirtydog Knob faced knobster Mega Poster Join Date: Jan 2005 Location: Haslemere Posts: 5,419	Re: Front Brake caliper leaking fluid As murley says if its not the banjo or line then its got to be the piston seal. Get the caliper off and have a good look at it. As for what to order, that depends on what you find when you inspect the caliper __________________ 2001 SV650 in shimmerin green, Not broken anymore

17-06-13, 08:56 PM	#6
sniff Member Join Date: Feb 2010 Location: Dagenham Posts: 724	Re: Front Brake caliper leaking fluid what about the bleed nipple. I had a problem with mine a few weeks ago and found out this was the reason. Changed nipples and job done.

17-06-13, 09:15 PM	#7
rictus01 Member Mega Poster Join Date: Jul 2003 Location: South London Posts: 9,799	Re: Front Brake caliper leaking fluid if the piston is weeping then it's go passed both seals, this is normally down to either very poor maintenance or badly scratched pistons, dependent on severity a strip clean and libreal application of RRG can minimize for a while, but really once the damage is done, replacement is the only solution. __________________ Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming, 'Wow! What a Ride!

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