SOHC.co.uk Forums > CB350/400
Sudden Loss Of Drive. CB350F
McCabe-Thiele (Ted):
--- Quote from: gtmdriver on July 26, 2021, 04:52:19 PM ---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.
--- End quote ---
Glad you sorted it - why replace the springs they should still be okay - even the clutch plates might not have been badly affected. I would be inclined to leave the plates & springs as they are and try it now you have found the culprit !
gtmdriver:
The clutch was slipping for quite a while so the friction material may well have overheated. The plates, springs and a new gasket come as a kit from DSS for only £39 so I'm doing the lot while I'm in there. I'm also fitting a new kick-start oil seal as that was weeping slightly.
TrickyMicky:
I think I would take a while checking to see where that M6 screw originated from!
philward:
And also be grateful the errant M6 screw didn't jam in a gear, etc!
McCabe-Thiele (Ted):
--- Quote from: gtmdriver on July 26, 2021, 07:27:46 PM ---The clutch was slipping for quite a while so the friction material may well have overheated. The plates, springs and a new gasket come as a kit from DSS for only £39 so I'm doing the lot while I'm in there. I'm also fitting a new kick-start oil seal as that was weeping slightly.
--- End quote ---
Being a wet clutch it is unlikely to have burnt like a dry car one does but then peace of mind is worth £39 I guess.
Any joy in identifying the likely origins of the screw you found ?
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