Another clutch ?

[paulbaker1954]

Are the friction plates the Sam for K0/1/2/3 etc

I read somewhere Honda did some clutch mods at some point to overcome clutch slippage issues

[JamesH]

Trigger or Bryan will know I'm sure....

[Trigger]

Are the friction plates the Sam for K0/1/2/3 etc

I read somewhere Honda did some clutch mods at some point to overcome clutch slippage issues

The clutch on the 500K0 had a clutch ring like the second generation 750K0 clutch..The 500K0 changed after number 1018727 to a up graded clutch on all the plates.

[Bryanj]

There was a none honda mod using different plates hand written in on old US parts book saying use 450 plates and late cb77 springs but no part numbers are given. I do know that the originals had slanted grooves on the friction plate and you have to fit them the correct way round

[deltarider]

If you are curious about the clutch modifications you may consult the various CB500 parts list here: http://www.honda4fun.com/materiale-documentazione-tecnica/parts-list/parts-list-cb500 but I doubt the pictures are Always accurate as far as the grooves.
I believe the clutch plates with slanted grooves were not much of a success.

[flatfour]

I fitted 450 clutch plates to my 500/4 some years ago as I was told that it would reduce pressure at the lever, which it did. They were bought from DS and have proven to be very satisfactory.

[deltarider]

Also in mine are CB450 plates, bought in Singapore when I was there.

[s7paul]

I've tried all kinds of things to improve mine (new cable, cleaned and re-greased the lifter mechanism, CB450 clutch plates) and it's still like an on/off switch.  The only way to pull away smoothly is by giving it more revs and slipping the clutch.  It's definitely worse than my original 500 (back in 1979) but I can't figure out why.

[paulbaker1954]

Might try the 450 plates. Is there a particular model year/part number I need?

[AshimotoK0]

Might try the 450 plates. Is there a particular model year/part number I need?

This is all I have on it Paul (same as Bryan mentioned). CB77 finished in 1968 so there is a clue to the springs. Will check 450 plates tonight.

I  guess a Doctor must have done those scriblings 

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[AshimotoK0]

Further to earlier reply Clutch friction plate for CB450 K0 bomber twin  through to K7 same PN 22201-283-000 superseded by 22201-MA7-000

OEM from DS https://www.davidsilverspares.co.uk/parts/by-part-number/partnumber_22201MA7000P/


Last CB77 Clutch spring in '68 was 22401-275-810  Special Order from DS @ £3.60 inc.

Hope this helps

[paulbaker1954]

OK thanks all

Ordered 450 plates and springs from DS.. let you all know how it ends up

[matthewmosse]

My sidecar bike had a slippy clutch and came with a new boxed set of hd clutch plates, I changed the oil, gave it a service, and kept riding, several oil changes later when I finally had time to sort the clutch it ran ok and the slip had gone ( those hd clutch plates are still in their box in my loft). It kept soldiering on for couple of 100,000 miles with no more than oil changes before 1st and 2nd gear started jumping out up hills. One thing I found was it was fussy about the brand of oil, Silkolene 10/40 and Morris 10/40 fleet oil seemed best, comma 10/40 was not to its liking at all, all semi synthetic.

[Bryanj]

That parts book page is the one I scanned!!!!

[AshimotoK0]

That parts book page is the one I scanned!!!!

Are you the 'Doctor' who did the scriblings then Bryan    Dissemination  of information to the masses and all that guff.