Biting point adjustment

[carbold]

Hi guys
my clutch is starting to bite very late - when the lever is close to the final position. I've done a search but - even though some had the same problem - there was no answer...Is there any way to move the biting point as for non-hydraulic clutches?

 

[toucan]

what bike is it?

i would have a go at adjusting the cable first. there is usually a threaded thingy at the clutch lever where the cable goes in. and maybe another one down at the gearbox somewhere.

 

[carbold]

Yes that would be the case with a normal cable-operated clutch but mine is hydraulic ('99 1150gs). I replaced the fluid and used good synthetic dot4 but it didn't make any difference.

 

[cookie]

dunno about GS's, but on a car that would tend to indicate the clutch was pretty worn.

 

[Steptoe]

Don't fill the reservoir to the top - as the clutch wears, the level rises -

 

[Gas'd Off]

I have the same problem, clutch takes up only when the lever is almost fully out. I think this is normal. I haven`t got round to it yet but I think the only option is to use the adjustment grub screw on the lever. I haven`t got round to it because it is threadlocked and needs some persuasion!

 

[Steptoe]

Bleed point No 12 is located on the rear subframe offside ( r/h side) .
cable tied to the subframe in a foam sleeve, just rearwards of the rear brake mastercylinder reservoir -

 

[Gas'd Off]

cable tied to the subframe in a foam sleeve

I was wondering what that was. Thanks

 

[carbold]

Lukate, I'm afraid that would only change the distance between lever and handle-bar, the biting point would always be far out...

 

[(RIP) Kaister]

You're supposed to be an Engineer aren't you ?

Do an FEA analysis on the clutch lever.

Analyse the whole system in mathematical formulae - indicating the possible causes.

Write a report about it - padding it to about 20 pages, and drawing a non-committal conclusion.



.... Then take it to someone who knows what they're doing and can actually fix the problem in 10 mins

 

[carbold]

I'm gonna have to finish my PhD first...Only then I will be able to scientifically address the problem and draw some conclusion...


Dr Carbold

 

[boundless]

2002-2003 1150 GS's : apparently there were a few dodgy slave cylinder mechanisms.

Mine failed completely at 6000 miles.

But the 'bite' moved inwards not outwards as it failed (ie closer to the bar.)

 

[carbold]

Great, I just have to hammer the slave cylinder then

 

[Gas'd Off]

I'm afraid that would only change the distance between lever and handle-bar

Are you sure? In my experience, most bikes I have worked on have a setup similar to my sketch below. This will alter the lever angle when the clutch bites. Maybe the GS is different? Anyone? Steptoe?

 

[Gas'd Off]

Ignore that previous sketch!!
It is back to front, D`oh!
Principle is the same though