SOHC.co.uk Forums > CB500/550
stiff clutch
Oddjob:
Or the push rod is broken. It should be one long rod not in 2 or more pieces.
neat street:
Thank you all very much for your replies.
Ted, the ajustment on the left hand side completly stripped cleaned and greased and works well.
Dave, the cable is new and runs nice so no fraying.
John, the side `screw`/worm drive is perfect and moves like a clock, was stuck before I stripped and cleaned, but now realy nice and smooth (well greased).
Brian, as above, worm drive works well, ball bearing intact, cable smooth and new, stronger springs?.. maybe, dont know how to check these, but measurements are well in spec from the workshop manual.
Ken, the push rod was broke in two but replaced on rebuild.
Thank you all very much for your help, not sure what next to try
TrickyMicky:
Just a shot in the dark, but, does the handlebar lever move freely. They are prone to collecting dirt and water, plus make sure the nut and bolt acting as the pivot have not been overtightened. Genuine Honda levers have a bush in this pivot point also. A little drop of grease here can help. Ironically, I have just renewed the clutch cable on my 400, usual procedure every couple of years as they tend to 'cook' over the top of the cylinder head. I would be tempted to fit yet another new cable, just in case, a lot less hassle than stripping down parts.
K2-K6:
I'm not so familiar with this mech particularly, but with others have had a wear issue with the helix material the clutch "pressure" lever works within.
With what initially appears insignificant slack between the two, it can really bind to poor effect when subjected to load by not staying true in its bore. They move easily when just that component is checked on it's own, but shft substantially as the cable pulls the component off axis under full clutch load operation.
Its something that helix arrangement are prone to if not complying with designed intentional stability.
There's differential type "Torsen" that makes use of this conflict to restrict and proportion slip by being manufactured to specified ramp angles in promoting this effect under more extreme loading. Not exactly the same as axial/radial unintentional float, but demonstrating how powerful this can be in locking the mechanism when required.
K2-K6:
One cheap way to test for helix binding is to use a friction "extreme" grease within it to assess in that status.
Automotive CV grease will provide one of the least binding characteristics you can easily get hold of to try it.
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