| Diagram | Fig. 16 — Swinging Arm, Suspension Units, Chainguard · ref 21 |
| Subsystem | primary |
| Listed in parts books | 1975 |
Norton Adjuster, Chain
Rear chain adjuster, Norton part 06-6109, used at the swinging arm to set final-drive chain tension.
This is a chain adjuster listed under Norton part number 06-6109. The catalog entry ties it to the swinging arm, suspension units, and chainguard area, which puts it at the rear of the bike where the wheel spindle and chain tension get set.
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The single catalog appearance we have is dated 1975, and the grounding note on this number points to the 850 Commando Mk3 rear wheel adjuster. Chain adjusters like this one work in pairs at the rear axle to slide the wheel fore and aft in the swinging arm slots, taking slack out of the final drive chain.
We don't have more detail on this one beyond that single listing. If you're matching it against your parts book, call the shop and we'll confirm fitment before you order.
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