Clutch slave cylinders

[wraith]

Ok all, because I'm shit at figuring this sort of thing out 

The clutch slave cylinders, you have the more standard 32mm piston (think it's 32mm) and the earlier 38mm (again think 38mm) could be out a couple of mm.

So question is, if using the same master cylinder would it make the clutch any different between ever of these slaves cylinders?

Ie make the clutch lighter or bit point in a different place? 

Thanks 

[coombehouse]

With a bigger diameter slave cylinder the lever will feel lighter as the slave piston will move a shorter distance. Could result in the clutch not releasing enough though.

[wraith]

11 hours ago, coombehouse said:

With a bigger diameter slave cylinder the lever will feel lighter as the slave piston will move a shorter distance. Could result in the clutch not releasing enough though.

A bit more digging, the one with the bigger piston is the 38mm from the slabby 750 the 35mm piston is from the gsxr 1100 sladdy and slingshot also the b12 rf9 etc

So as you say fitting the 38mm should make the leave lighter but if it doesn't disengage the clutch fully, fitting a longer push rod help ? 

Think you'd be only looking at a couple of mm longer maybe. 

Daft questions yes but all info  plus the brain seems to be working today 

[clivegto]

23 minutes ago, wraith said:

A bit more digging, the one with the bigger piston is the 38mm from the slabby 750 the 35mm piston is from the gsxr 1100 sladdy and slingshot also the b12 rf9 etc

So as you say fitting the 38mm should make the leave lighter but if it doesn't disengage the clutch fully, fitting a longer push rod help ? 

Think you'd be only looking at a couple of mm longer maybe. 

Daft questions yes but all info  plus the brain seems to be working today 

If you fit a too long push rod the clutch will slip. I used a brembo 19RCS clutch master cylinder on the Harris to move more fluid. 

[wraith]

1 hour ago, clivegto said:

If you fit a too long push rod the clutch will slip. I used a brembo 19RCS clutch master cylinder on the Harris to move more fluid. 

Cheers mate,

just thinking about something a bit lighter, as the stiff hands sometimes just don't want to bother with the clutch  don't really what to go down the cable conversion as I like my fish sprocket cover. 

[wobblegob]

I've got a oberon clutch slave cylinder on my 7/12 and also on my minja (massive ninja) and I know it's certainly lighter on the minja than stock. Can't say if it's lighter on the gsxr as didn't really use it with stock one

[coombehouse]

On 5/5/2025 at 11:17 AM, wraith said:

A bit more digging, the one with the bigger piston is the 38mm from the slabby 750 the 35mm piston is from the gsxr 1100 sladdy and slingshot also the b12 rf9 etc

So as you say fitting the 38mm should make the leave lighter but if it doesn't disengage the clutch fully, fitting a longer push rod help ? 

Think you'd be only looking at a couple of mm longer maybe. 

Daft questions yes but all info  plus the brain seems to be working today 

No fitting a longer push rod cannot help as the piston movement is not related.