From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Amendments and additions to the Bensport Series 1 specification.
| Identifier | ExFiles\Box 3\4\ 04-page242 | |
| Date | 22th March 1933 | |
| X6553 E.{Mr Elliott - Chief Engineer} Dept. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Dept. D.{John DeLooze - Company Secretary} Dept. S. Dept. He. RMO. Mov. Wo. BY/SS{S. Smith}1/N.22.3.33. BENSPORT SERIES 1 SPECIFICATION. AMENDMENTS AND ADDITIONS. Section. | Description. | N° Design. Crankcase & Bearings. | Standard 20/25 bottom half not used. New bottom half with starter motor raised .625 to improve ground clearance. One bolt boss on flywheel and joint face modified to give clutch pedal clearance. Top half with modified facings for idler wheel mounting and camshaft bearing. Wheelcase face profile modified. 3 joint face bolts replaced with studs. | Lec.3406, Lec.3401, Lec.3407 ring drive. | Pan pulley diameter reduced. | Lec.3397 Piston. | Standard 20/25 piston. | E2/HP.20.3.33. Cylinder. | Cylinder head front cover. Boss on rocker cover for breather connection. Vee shaped vents in rocker cover bosses deleted. | Lec.3397, Lec.3395, Lec.3395 Camshaft. | Front end modified to suit plain bearings. New gear wheel. | Lec.3407 | ||