SOHC.co.uk Forums > CB350/400
Sudden Loss Of Drive. CB350F
gtmdriver:
It's not so much the adjustment as the fact that it's suddenly changed.
K2-K6:
That's why there's a need to check it.
The engine mechanism leveraging the clutch plates to open is set relative to the total accumulation of the plate's thickness within the clutch pack, the cable is then adjusted to fully operate this (essentially separate) device. Once the plates show significant deviation from original set point the error is "seen" within the cable, but with the problem existing entirely within the clutch operating mechanism after the end of the cable.
Nurse Julie:
Has the ball bearing fallen off the end 🤔
McCabe-Thiele (Ted):
Certainly clutch slip would imho be my first thought - if you have all the gears & it pulls at low revs it's got to be connected with it slipping either due to wear, the clutch operating system or synthetic oil being too slippy by half. Or even a bit of all three.
I guess you need to start with the obvious first check - cable - end operating mechanism - then check the plates themselves.
gtmdriver:
So I pulled off the sprocket cover and checked out the front and rear sprockets and splines then moved across to the RHS.
I drained the oil ready to remove the clutch cover then took off the kick-start and footrest.
As I came to release the clutch cable from its abutment on the cover I found the problem. An M6 Philips screw about 30mm long (origin unknown so far) had fallen and jammed between the clutch operating lever and the casing and was stopping the lever from fully returning so the clutch was stuck partially disengaged.
Since the clutch had been slipping for a while as I crawled home I decided to continue with the stripdown so that I could check the steel plates and renew the friction plates and springs.
It turns out that there isn't a ball bearing in the operating system. There's a short ball ended pushrod between the internal operating lever and the spring plate.
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