Go
to the Archive indexSome information about the Cymota unit from period sources: The Cymota is a 45cc two-stroke internal combustion engine utilising a deflector type piston. The motor, fuel tank, battery and fixing clamps are mounted on the black back plate (ie "the chassis") and the lamp is mounted in the bonnet (ie "the body"), which covers the motor and fits flush against the back plate, rubber beading being inserted to prevent rattles.
| Bore | 38mm |
|---|---|
| Stroke | 40mm |
| Cubic Capacity | 45cc |
| Carburettor | Amal type 308 |
| Main jet | 25 |
| Mixture control needle | in centre slot |
| Fuel tank capacity | 3 pints |
| Fuel | Petroil mixture in the proportion 20:1. The measure attached to the fuel cap holds the correct amount of oil for 1 quart of petrol. |
| Lubrication | The following grades are recommended for summer & winter: SingleShell, Wakefield Castrolite, Mobiloil Arctic, Essolube 20 (ie all grades to SAE 20) |
| Plug | Champion L10 |
| Gap | 0.018" |
| Ignition & lighting | Flywheel magneto |
| Bulbs | Headlamp: 8v 0.5A |
| Parking light: 4.5v 0.3A | |
| Tail light: 6v 0.5A | |
| Battery | Twin cell, Exide C60 or Ever-Ready 800 |
| Contact breaker gap | 0.012" - 0.015" |
| Timing | 0.015" BTDC |
First published - October 1991