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Front Master Cylinder


2 Wheels
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Hey lads

Can one of you tell me how my rubber diaphragm should sit in the cylinder please.

When I fill the cylinder to the correct level,, should the diaphragm be put in ( flat, ie. all closed up ) or ( open, ie. all pushed out )

 

Many thanks: Pat

P's,,, how u all keeping

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I think, and may be wrong, that its there to stop the fluid sloshing about as the level changes and causing bubbles and ruining your fluid.

I have gone with flat tbh, never really thought on it too much, but I think the vacuum of the fluid dropping will pull it down as the level drops.

 

Yeah fine thanks Pat, you should drop in more often.

 

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what cynic said, flat with the vacuum pulling down to fill any void.

 

don't leave it so long let us know how you're doing :)

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Ok, thanks very much for your knowledge..cynic and drew

 

I do look through the forums every now an again but never seem to post,,,,,, my bad,

All is well with me and family.

Bike has just got:

2 tyres,, brake pads all round,, flushed old brake fluid,, wheel bearings front an back,, new battery,,oil change,, air filter,, flushed and new coolant,, new plugs,,,,,,, think that's it.

Am having front brake drag at the moment and can't seem to sort it out. Hopefully I won't have to overhaul the front calipers.

Once again, cheers lads

Pat

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Hey Patrick,  :wavey:,   have you still got the Fazer600 ?.   we might be over to Ireland this summer, [ if is don't rain]  :ylflower:

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On 08/02/2016 at 9:54 PM, blackhat250 said:

Hey Patrick,  :wavey:,   have you still got the Fazer600 ?.   we might be over to Ireland this summer, [ if is don't rain]  :ylflower:

Hey John, yep still have the good aul fazer B) it is always raining in Irl. Be good ta see ya. ill pm ya over the weekend

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On ‎08‎/‎02‎/‎2016 at 9:38 PM, 2 Wheels said:

Am having front brake drag at the moment and can't seem to sort it out. Hopefully I won't have to overhaul the front calipers.

 

Remember to check your master cyl as it might not be allowing the fluid to return, old hoses can do that too. Could have some slight warpage too, my Suzuki discs warped to a dished profile. Didn't feel any vibes but it dragged, which heated the disc which caused more warp etc

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Ok, had a wee look again 2day.

Looks like the caliper pistons are at fault. The bottom 2 small ones on each side are hard to push back.

The master cylinder and splooge hole seem to be working well, I can see fluid return through the hole when supposed to. All the pipes look in good condition and are not soft anywhere when trying to squeeze them. The disks seem straight enough when I put a straight edge iron ruler across them,,,didn't take them off.

This only started happening straight-away after I replaced the old pads,,tyre,,,bearings,,,speed sensor. (I done them all at same time.)

So am guessing I need piston and seals for the caliper ?

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