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Dragging clutch

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Scottvincent:
I took a punt on a non-running 1976 F1 for not a lot of money. I worked through the bike and now it runs, stops and generally does everything reasonably expected of it except for the clutch. When I bought it, I assumed that the plates were stuck and that a good ride would clear things and when there was no change I removed the clutch and checked and cleaned everything. There was no change. The bike would only go into gear with a nasty clunk and the bike had to be held on the brakes, eventually stalling. At this point, I put it away and concentrated on the bikes that were behaving themselves! When the pain had subsided, I bought a new set of plates from D Siver and fitted them; again no change. The bike was banished again. Recently I had time to look at it again. Everything seems to be correct. The clutch action is smooth and the  cable is adjusted as per the manual but it still will not go into gear without a clunk and it drags badly. I have tried screwing in the clutch release by half a turn but it still clunks but not as badly. Can I turn the clutch release in further? ( I don’t really like to do this as I feel that it should work as per the book). Any suggestions would be gratefully received, as I have now had the bike for two years and I would like to ride it when the world returns to normality.

Thank you

robvangulik:
By how much did you adjust the clutch center bolt (is that what you mean by clutch release?)
Normally it is screwed in until resistance is felt and than back a quarter to (maximal) a half turn. When you write you screwed it in a further half turn I think you had it far too much turned out!

Nurse Julie:
Don't you mean screw the clutch release out further not in. Turn it in until it just touches then back it off  ¼ of a turn. I think that's the part in the manual with a miss print.

MrDavo:
If I remember rightly, the direction arrow in the CB750 owners manual points the wrong way, at least it did in mine.

Like you, apparently, I learned this the hard way.  :(

Scottvincent:
Thanks for the prompt replies but I must not have expressed myself accurately enough. I did adjust the clutch as per the manual, turn clockwise until it touches and then back off. At that setting, it will not allow me to select a gear without more crunching than my mechanical sympathy would take and then the bike will take off or will stall if I use the brake! I turned the adjuster screw half a turn extra clockwise to see if this would allow me to select a gear without the above happening. It almost feels as though there are too many clutch plates!
When I had the clutch apart I ‘dressed’ the slots in the clutch basket to reduce friction and I have changed from semi-synthetic oil to GTX to see if that had an effect.

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