Rudge 1938 Special 495 cc 1 cyl OHV 3512

Rudge 1938 “Special” 495 cc four-valve two-port single frame # 62605 engine # S5791

The Rudge-Whitworth company was an established bicycle factory that entered motorcycle production in 1911. Their first machines were 499 cc IOE singles. They developed the famous Multi gear, with a possibility of up to 21 gear positions. In 1924 the factory introduced a new range of four valve singles. In 1928 Graham Walker managed to win the Ulster Grand Prix on a Rudge, after a heroic handlebar-to handlebar battle with Charlie Dodson on a Model 90 Sunbeam. Since then the sporty Rudge models were designated “Ulster”. In 1931 the engine was scaled down to 250 cc and that proved to be a real winner too, judging from 1st, 2nd and 4th places plus the lap record in the Junior TT. Rudge used several layouts for its 4 valve models and from the 1931 model range on they settled for the semi-radial arrangement of parallel inlets (in a flat head surface) for deep breathing and radial exhausts ( in a part spherical surface) for cool running. At the same time plug size was reduced from 18 to 14 mm to allow more metal between the hole and the exhaust seats. This layout proved very successful and was retained till the end of Rudge production in 1940. An important
new feature for the 1937 range was the enclosure of the valve gear by a neat aluminium cover. For 1938 the front forks were improved: the bearing areas were increased and the total weight was lowered. “Thus improving the already exceptional steering and road-holding qualities” the company claimed in the 1938 catalogue.
This “Special”, the touring version of the “Ulster“, is a sturdy, well made machine and has been restored in the past. She’s had only four owners from new; a dating certificate issued by the Rudge Enthusiasts Club states that she was manufactured in November 1937 as a ’38 model. She has been on the Rudge Machine Register since 1970. The 495 cc engine delivers 22 hp @ 4,800 rpm. Interesting features of this model are the coupled and compensated brakes and the very practical centre stand with Rudge-Whitworth patent easy-to-operate hand lever. Accessories include a well-sprung pillion seat, luggage rack, Smiths 85 mph speedo and clock. On the front mudguard we find a brass plate stating the machine was supplied by Renno’s in Islington. This well-built Rudge is a compact machine with a willing engine and powerful brakes, she is a delight to ride and copes easily with present-day traffic conditions.