Fs570 clutch losing pressure

FS Snowy · Apr 30, 2017

Hi all, my first post on here, I've just picked up a fs570 2011. First ride out today and the clutch seems to keep losing pressure can pump it back up by cycling the lever a good few times but then it loses pressure again. Can anyone help, hoping it's a simple fix, where should I start,

thanks in advance

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Rainerio · Apr 30, 2017

Some slave cylinder can leak. My FE570 does. sounds like maybe yours is one of then. Bleed it with oil mineral and keep an eye on it. I have to check It every 6 months. Or you replace the slave cylinder.

FS Snowy · May 1, 2017

Thanks rainerioI will check today and have a look today as I haven't touched anything yet I'll top it up any bleed it see if I get any improvement

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fe390vt · May 1, 2017

You need to replace the o ring that seals slave piston. Happened to me. Think that engine heat caused it. This motor produces lots of heat. Intake boot also may start cracking due to heat.

Rainerio · May 1, 2017

Fe390vt Can I get the part number from You for that O-ring

FS Snowy · May 1, 2017

Thanks fe390vt I will order some and let you know how I get on

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fe390vt · May 2, 2017

Piston seal i should have said, as there is also an o ring that seats the slave cylinder to motor. Think it may be the same seal as brake piston as I believe i used a spare from brake. Dont have part no. Kind off a pain to get the new seal in if i remember correctly. You may want to buy a couple spares in case it rips.

FS Snowy · May 5, 2017

I took off the master cylinder cap, the level was low in there, so I went and bought some mineral oil, topped it up and it has been fine ever since, I gave Midwest a call and explained to them what had happened and they said just closely monitor the level in the MC. im not sure whether to order the piston seal or a new slave

SRG · May 5, 2017

+ 1 on the slave cyl. O rings. Not hard to replace. Sorry, don't have a PN, I bought 5 from someone who bought 100. If it starts leaking again (I think it will) and you can't find a replacement send me a message.

Rainerio · May 5, 2017

How about size of O-ring. You know something like 60mm OD x 2mm thick it has to made by someone. Thanks and I have to fill it about every 6 months and it's going to take a crap some day and have to replace it.

FS Snowy · May 6, 2017

Thanks Srg if it's not to much hassle could you measure it, I think I know a place where I can get one with the right dimensions

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ethem · May 7, 2017

also interested in the p/n or dimensions of o,-ring

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Fs570 clutch losing pressure

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