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clutch not engaging and dragging !!

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mick:
Have to agree with the other Mick according to your engine number its a F1 , if you need anymore info or photos just ask my engines going to be in bits for a while yet  ;), cheers Mick.

bluemouse1006:
Mick

Thanks could it be I've thought I had a K engine and bought a K clutch from ebay not realising I have a F1 engine in my bike ???
The first photo on this post is the width of the splined outer clutch section. Mick on your F1 clutch it seems that yours is 40mm mine measures 43mm
The second one is the depth of the splined section this measurement is 23mm, the splined section on the gearbox  (third photo) with the splined washer fitted is 19mm which the difference is about the thickness of the washer !! which is where my problem is as when I fit the washer it pushes the whole clutch too close to the casing causing it to catch.
all the measurements of the clutch bits seems to suggest that it is too big to fit in the hole !
Mick I know its a pain could you take the measurements re my photos on this post and let me know what you get. if yours ends up to be smaller than mine which I would hope to be about 3mm then that's my answer and ill look out for a F1 clutch assembly if not then it a gallon of petrol and a match wafting it with the insurance documents ha ha

cheers Amos

Bryanj:
Sorry folks, according to the HondaMotorcycle Identification Guide 1959-2000 (part number 2GMAS00-AH should you want one) The F1 engine starts CB750FE-2515094 onwards and the CB750K'76 starts CB750E-2428762 onwards So as its missing the second F it ought to be a K6.

Now Honda are not perfect with there publications and it is a US guide so its a guess here.

When you go to motogrid and get the part number , put it into the part look up side on the right then click the modles link and it will tell you all the bikes the part is used on. Having done that for the clutch centre you get

CB750F A MOTORCYCLE, JPN, VIN# CB750F-1000002 TO CB750F-1015054
CB750F A (76) MOTORCYCLE, JPN, VIN# CB750F-2000003 TO CB750F-2022317
CB750K A (76) MOTORCYCLE, JPN, VIN# CB750-2540001 TO CB750-2575894
CB750K0 A MOTORCYCLE, JPN, VIN# CB750-1000001
CB750K1 A MOTORCYCLE, JPN, VIN# CB750-1044650
CB750K2 A MOTORCYCLE, JPN, VIN# CB750-2000001
CB750K3 A MOTORCYCLE, JPN, VIN# CB750-2200001
CB750K4 A MOTORCYCLE, JPN, VIN# CB750-2300001
CB750K5 A MOTORCYCLE, JPN, VIN# CB750-2500001


So it would seem they are all the same till you get to the F2 in 77

bluemouse1006:
Good bit of research there

Im told that I have a F1 engine and the frame number of my bike is CB750-2106706 does this still make sense as the engine number is as you say CB750E-2560081 ???? a K
still cant understand why the Bl**dy thing doesn't fit !!!!! everything is there as in the manual and how the photos posted on this site show.
any measurements of the centre boss and the shaft in the box (the only two things that would determine the position of the clutch ) would be much appreciated

Thanks again

If mine is too big then Ill either file the few mm off or when at Donnington this weekend look for another

look forward to you comments again


Amos

mick:
Hi Amos i managed to get some more detailed photos i hope you can understand them and they are of some help  ;).




2 measurements from the centre  1st one is on the shoulder & the 2nd is dropping into the splined middle (hope you get that part).

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