| Diagram | Fig. 12 — Electric Start · ref 18 |
| Listed in parts books | 1975 |
Norton Sprag
A one-way sprag bearing for the electric start system on a 1975 Norton, part number 06-4733.
This is a sprag bearing off the electric start system, listed under Norton part number 06-4733. It's the one-way bearing that lets the starter motor drive the engine over without the engine trying to drive the starter back once it fires.
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The figure heading on this one reads Electric Start, and the catalog ties it to the 1975 model year. This is a Norton part, not a Triumph part, so if you landed here cross-shopping a Triumph electric-start setup, double check you've got the right machine before ordering.
Sprags wear or lose their one-way grip over time, and a bad one usually shows up as a starter that spins but doesn't turn the engine over, or one that makes noise on shutdown. Check your parts book against your machine before you order to make sure this is the correct bearing for your setup.
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