SOHC.co.uk Forums > CB750
Dragging clutch
K2-K6:
It could be informative if you set the operating mech with it in place, then remove the cover and clamp a straight edge across the inside face.
Now you can measure the total lift for full pull at the handlebar lever to assess just how much it will complete.
Would need a comparitive reference from someone else to try and at least eliminate this part from enquiries.
Scottvincent:
Thanks Jedi. I will try this.. I think that the mechanism is working ok but it would be useful to compare the lift with a known working example. I hope that the force will be with me!
K2-K6:
More thinking out loud than explanation, when the clutch pack is a assembled it will end up with the thrust bearing at an accumulation of the combined thickness of the clutch plates in it's position relative to the outer case.
The adjustment screw then allows you to position the lift mech in relation to that datum (it will vary according to wear etc of those plates) with the designed lift dimension able to enact a linear movement such that each plate is given clearance to stop it gripping. If the pack had more plates, or the plates are distorted, then you'd need more lift to give free movement.
Ordinarily you'd expect one of the three "dimensions " to be away from expected to let the the clutch still drive the output shaft substantially, and make the gears rotate when you are trying to move them.
Obviously the clutch lift mech is controlling the amount of lift you have, maybe some pictures of it dismantled will draw comment from other's here if there's anything obviously amiss.
SteveD CB500K0:
--- Quote from: Scottvincent on January 04, 2021, 10:27:35 AM ---Thanks Jedi.
--- End quote ---
He’s not a Jedi - he’s a very naughty boy ( sorry - bit of a misquote there )
Sent from my iPhone using Tapatalk
K2-K6:
--- Quote from: SteveD CB500K0 on January 04, 2021, 03:06:24 PM ---
--- Quote from: Scottvincent on January 04, 2021, 10:27:35 AM ---Thanks Jedi.
--- End quote ---
He’s not a Jedi - he’s a very naughty boy ( sorry - bit of a misquote there )
Sent from my iPhone using Tapatalk
--- End quote ---
From one of Mrs K's favourite film scenes :D
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