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This is your belt drive, from your post. It is a normal Scott Bonnar 590 drive.

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This is your clutch control cable. I can't tell from the picture what it does at the lower end. It is presumably operated by the squeeze-handle on the handlebar.

Please post some pictures to show some detail of what the lower end of the clutch control does. It could operate a standard SB drum clutch, or it could operate through a bell crank to tension the belt drive. We discussed this question in a previous thread some time ago, without finding out the answer.

Last edited by grumpy; 04/10/12 09:08 PM.