HEL master cylinders

[Zixxer]

Hello lads - has anyone had any luck with the HEL master cylinders for the clutch on the 1100

I’m having no luck getting a 19mm master cylinder from them to work on my 87 Slabby 1100 clutch 

tried messing around with longer pushrod but no luck - it’s like it’s almost bled enough but just won’t give that final bite to be enough and I have BLED it now big time 

It is the largest size they make so thought it would displace enough fluid to do the job

[Reinhoud]

Does it has enough travel?

 

I just bought a Brembo clutch master, the Nissin had a 14mm piston, the Brembo has 13..

My clutch hardly works, after some detective work I found out that the Brembo has about 10mm less travel on the piston, therefore I need to build a slave cylinder with a smaller diameter.

 

You need a minimum of 3mm travel on the pressure plate of the clutch, to disengage it properly.

So, the content of the clutch master (surface area X travel) need to be the same as the slave cylinder (surface area X travel)

 

I can do some calculations for you, but I need details from you;

Diameter piston old pump + travel

Diameter new pump + travel

Diameter Slave cylinder

Edited August 31, 2022 by Reinhoud

[clivegto]

@Rossco(Icema Josros)has them on his slabside. 

[Digs]

Planning on buying one of the 16mm clutch masters to match my Front Brake master for my 1100, are you using a FB master flipped? 

[Dezza]

It's a whole lot less hassle, cheaper, simpler, and lighter to do a cable conversion. I use a GSXR1000 lever and perch, and 750 teapot cable and cover. If you use flat bars instead of clip ons, then use a Blandit 600 cable. The clutch action is surprisingly light, and I still cannot understand why all oil-cooled bikes didn't have cable clutches as OEM .

[Mike711]

What ratio (distance from pivot centre to plunger centre) is the Hel cylinder, it's probably 16 or 18? I have used Accossato 19 x 18 (edit, it was 19 x 20 ) cylinders on ZZR1400s & Vmaxs both of which struggle with anything less.

Edited September 13, 2022 by Mike711

[Rossco(Iceman Josros)]

On 8/31/2022 at 10:39 AM, clivegto said:

@Rossco(Icema Josros)has them on his slabside. 

@clivegtothats my dodgy/ don’t work profile lol.

@Zixxer my clutch mastercylinder is a 16 mm I would not think that a 19mm one is suitable…..