| Diagram | Fig. 12 — Electric Start · ref 5 |
| Listed in parts books | 1975 |
Norton Gear, Idler
Idler gear for the 1975 Norton Commando 850 electric start gear train.
This is an idler gear from the electric start setup on a Norton, listed in the 1975 catalog for the Commando. The catalog entry is brief, so we're going by what the parts book shows: it appears under the Electric Start figure for that model year.
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An idler gear in a starter train sits between the starter motor's drive gear and the gear it's turning, there to carry motion across a gap or to change rotation direction without changing the overall gear ratio. On a Commando electric start setup that means it's part of the gear train that gets the starter motor's output down to the crank or primary drive.
We don't have more detail on this one beyond the single catalog listing. If you're rebuilding a Commando electric start assembly, call the shop and we'll confirm fitment before you order.
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