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Technically Speaking => Engine & Gearbox => Topic started by: VladTepes on Monday, 30 November 2020, 02:47 PM

Title: Clutch lever travel - very little friction zone - fix?
Post by: VladTepes on Monday, 30 November 2020, 02:47 PM
So the clutch master cylinder / line has been bled and now there is very little lever travel between disengaged and fully engaged.

The clutch disengages totally with about 1 cm of lever travel (from lever fully out).

This is painful as it makes slow manoeuvring reliant on use of rear brake rather than in combination with slipping the clutch.

I've also managed to stall it at lights a few times this morning....

What do I need to adjust and how?
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: steve porter on Monday, 30 November 2020, 03:34 PM
the only adjustment is at the lever 5 is the closest from memory
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: SA14 on Monday, 30 November 2020, 05:42 PM
Factory setting is number 2.

Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: grog on Monday, 30 November 2020, 05:59 PM
Not sure number mine is on, have never moved it. That is only adjust Vlad.
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: steve porter on Monday, 30 November 2020, 06:02 PM
It may have moved to between numbers during vigorous bleeding which being a point instead of a flat moves the lever further away
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: VladTepes on Tuesday, 01 December 2020, 11:45 AM
I've got after market levers - the thing is that before the bleed i had a range of friction zone now its much smaller.  Weird.
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: Eric GSX1400K3 on Tuesday, 01 December 2020, 12:34 PM
The clutch master cylinder is the same principle as the brake master cylinder, given that your brake MC was stuck in its bore, theres a chance that your clutch mc is suffering the same fate.
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: Mick_J on Tuesday, 01 December 2020, 08:12 PM
Quote from: SA14 on Monday, 30 November  2020, 05:42 PM
Factory setting is number 2.

The two spanners is not the setting but the difficulty rating for home maintenance. 1 = very easy, 5 = skilled home mechanics only.
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: SA14 on Tuesday, 01 December 2020, 09:30 PM
Quote from: mjgt on Tuesday, 01 December  2020, 08:12 PM
Quote from: SA14 on Monday, 30 November  2020, 05:42 PM
Factory setting is number 2.

The two spanners is not the setting but the difficulty rating for home maintenance. 1 = very easy, 5 = skilled home mechanics only.

That's true but in this case the factory setting is actually (coincidentally) also number 2 on the dial. I posted that pic to show what the manual says about the clutch being non adjustable. I can see the confusion but it's just a coincidence.
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: Eric GSX1400K3 on Tuesday, 01 December 2020, 11:24 PM
Quote from: VladTepes on Tuesday, 01 December  2020, 11:45 AM
I've got after market levers - the thing is that before the bleed i had a range of friction zone now its much smaller.  Weird.
I'm assuming your aftermarket levers aren't adjustable? I had Pazzo gold levers on my Daytona 675 that were 8 position adjustable. 
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: VladTepes on Wednesday, 02 December 2020, 02:09 PM
Quote from: Eric GSX1400K3 on Tuesday, 01 December  2020, 11:24 PM
I'm assuming your aftermarket levers aren't adjustable? I had Pazzo gold levers on my Daytona 675 that were 8 position adjustable.

Yeah they are adjustable but it only adjusts reach it doesn't make any difference as far as engagement / friction zone is concerned.
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: steve porter on Wednesday, 02 December 2020, 06:56 PM
Might be worth cleaning and greasing the clutch pushrod, if it has stiction it can cause the clutch to feel funky
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: grog on Wednesday, 02 December 2020, 07:13 PM
Its a strange one Vlad, my friction point on mine so good. Obviously yours was, cant see how it could change, yeah maybe pushrod clean, about all i can think of. Unless, still some air trapped, that could give a weird feel. It really has to be air, thats all youve changed. If some air left in system, would that give uneven feel, im thinking yes. Air doesnt compress same ratio as solid fluid. Just my thoughts. I remember old bloke telling me, if it worked before, doesnt now, what did you change. All you did was bleed fluid.
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: steve porter on Wednesday, 02 December 2020, 07:57 PM
Could be a sticking slave as well
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: Eric GSX1400K3 on Wednesday, 02 December 2020, 10:19 PM
Original clutch plates?
Or sticking slave cylinder plus air in the system as already suggested.
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: Blubber on Thursday, 03 December 2020, 02:29 AM
On doing my clutch fluid change, i noticed it would bleed a lot better if i limited the travel of the slave piston.

Have you tried blocking the piston and re bleed ?

It is a bit more work but i am happy with the outcome
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: KiwiCol on Thursday, 03 December 2020, 03:01 AM
Mikes was done by the shop.
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: Blubber on Thursday, 03 December 2020, 03:28 AM
Quote from: KiwiCol on Thursday, 03 December  2020, 03:01 AM
Mikes was done by the shop.

Shops have students / apprentices / reintegrators too. A thinking error may not always be spotted by the master mechanic  ;)
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: KiwiCol on Thursday, 03 December 2020, 03:57 AM
True, that's why I prefer to do my own stuff, if possible.
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: seth on Thursday, 03 December 2020, 04:13 AM
I'm one of the people who always does his own repairs and servicing .
I've seen time and time over that the slave cylinder go sticky on our bikes .
There are other problems that can affect the clutch but I'd always still go for the obvious reasons before going further in to things .

Hopefully this problem gets sorted asap . :cheers:
Title: Re: Clutch lever travel - very little friction zone - fix?
Post by: VladTepes on Thursday, 03 December 2020, 09:03 AM
Quote from: Blubber on Thursday, 03 December  2020, 03:28 AM
Quote from: KiwiCol on Thursday, 03 December  2020, 03:01 AM
Mikes was done by the shop.

Shops have students / apprentices / reintegrators too. A thinking error may not always be spotted by the master mechanic  ;)

Not this one - he's a (very busy) one man band.