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Slipping clutch
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I just want to tell the story of my clutch to help get things started here:
Bought the bike with 7000 km on the clock, after a while I noticed some light slip when accelerating hard in the lower gears. Nothing at 90 kmph roll-on.
I installed Barnett springs, 3 soft and 3 hard as someone recommended. Then it started to slip at any speed with throttle opening.
I then installed the remaining 3 hard springs with little improvement.
I use the Yamaha spring plate as the Barnett one is flimsy and the holes do not align.
So, here I am waiting for the Barnett plates to arrive. Any week now, I am told...
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Re: Slipping clutch
« Reply #1 on: »
Aha! The clutch... Just what i was in the middle of when the MTOC forum vanished.
Can i ask where you got yours from?

Cheers
Nat
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Re: Slipping clutch
« Reply #2 on: »
The Barnett parts I ordered from a local dealer. The Barnett order page does not accept orders outside the USA, however, if you write them you can order from anyplace (see faq, if  I remember correctly). That would probably have saved some time and added shipping costs. I did not notice the possibility to order directly.
« Last Edit: June 13, 2017, 05:53:12 am by Danmt »
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Re: Slipping clutch
« Reply #3 on: »
Installed the Barnett plates, except the innermost anti-chatter plate which would have required a new clip. works ok anyway.
I believe the acute slipping I experienced was due to air bubbles in the hydraulic, even the Barnett plates and springs slipped before I bled the system.
Not so anymore...
The outermost plate is offset one notch. This is acc. to the manual, but I cannot figure out why this is necessary.
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Re: Slipping clutch
« Reply #4 on: »
Quote from: Danmt on June 19, 2017, 07:44:47 am
Installed the Barnett plates, except the innermost anti-chatter plate which would have required a new clip. works ok anyway.
I believe the acute slipping I experienced was due to air bubbles in the hydraulic, even the Barnett plates and springs slipped before I bled the system.
Not so anymore...
The outermost plate is offset one notch. This is acc. to the manual, but I cannot figure out why this is necessary.

Cant see why air in line would cause slippage?
Is it all good now?
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Re: Slipping clutch
« Reply #5 on: »
Re. air in the line, or actuating cylinder I do not really know why that would not allow the clutch to fully engage. The lever feel was also very different, the resistance began immediately from the rested position. After bleeding, there was again a play before the resistance.
Probably, as the engine warmed up, the air bubble expanded and pressed on the pressure plate. One does not load the engine when it is cold, so it will be hard to prove it.
Reason for the air in the system was probably a combination of rotating the clutch grip down for better comfort and a slightly low fluid level.
I must say the 6 red springs from Barnett are heavy, either my left hand is going to break or it will become immensly strong...
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Re: Slipping clutch
« Reply #6 on: »
Quote from: Danmt on July 17, 2017, 04:33:47 am
Re. air in the line, or actuating cylinder I do not really know why that would not allow the clutch to fully engage. The lever feel was also very different, the resistance began immediately from the rested position. After bleeding, there was again a play before the resistance.
Probably, as the engine warmed up, the air bubble expanded and pressed on the pressure plate. One does not load the engine when it is cold, so it will be hard to prove it.
Reason for the air in the system was probably a combination of rotating the clutch grip down for better comfort and a slightly low fluid level.
I must say the 6 red springs from Barnett are heavy, either my left hand is going to break or it will become immensly strong...

Right, yes, so with no freeplay at the lever the clutch was partially "on". Ah well , all good now. Yes , they are heavy and a good strong argument for using standard length levers. Do you maybe have shorties on, I noticed with Zuk's bike that the short lever made the barnett a real effort. With the standards I dont have any problem.
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Re: Slipping clutch
« Reply #7 on: »
Standard levers only. Still heavy, esp. after a long ride. The roads I like ride make me go from 5th to 4th and back more or less constantly.
Not a big problem.
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Re: Slipping clutch
« Reply #8 on: »
Quote from: Danmt on July 18, 2017, 02:51:40 pm
Standard levers only. Still heavy, esp. after a long ride. The roads I like ride make me go from 5th to 4th and back more or less constantly.
Not a big problem.

Dan, do you mean that its heavier after youve ridden a while or are you just more tired.
Given the issue you had pre bleeding maybe a strip and clean of slave cylinder is needed.
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Re: Slipping clutch
« Reply #9 on: »
I'll take your advise under consideration.  ;D
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Re: Slipping clutch
« Reply #10 on: »
+1 a rebuild....! 

  Replacing all seals and fluids in both the master and slave certainly wont do you any disservice...Also , replacing the lines with OEM, or better still, braided a hose...This will all help to eliminate issues with actuation and freeplay and bleeding.
  Of course, none of this may solve the issue but read your manual and learn the scheduled replacement and service intervals for these items, and Id put money on them being out of date for a service and replacement....!   ;D

 

 
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  3. Slipping clutch