Clutch Revision History

[davis]

Can anyone give the reason why the clutch design changed so often during the 350's short production run?

The final version of the clutch hub I have appears to be field mod. #2 with the flange machined off, judging by the tool marks. Also, the mod #2 has one of the five posts broken off. I've seen missing bolts in pictures of other clutch assemblies and wonder if the posts were too weak for (reasonably) robust use.

[BRT-GTR]

Davis,
        There was a recent post by Sye that covers the changes made to the clutch as below. Have a read through.

       http://bridgestonemotorcycleparts.com/index.php?topic=3797.0

    There was a known problem with plate breakage but BS never put this in writing as far as I know.  They claimed the changes were made to reduce clutch inertia or try to quieten the clutch but I think we know the real reason!!

  Brian