Indian 1939 Model 639 Sport Scout 745cc 2 cyl sv 3602

Indian 1939 Model 639 “Sport Scout” 745cc side valve V-twin frame # 6391030 engine # FCI1030

video: https://youtu.be/ose-Y3Hs9JA

In 1932 two new lightweight twin cylinder models are introduced, the 750cc “Motoplane” and the 500cc “Pony Scout” which will later be renamed “Junior Scout”. The Motoplane is marketed as a light and simple low-cost sports machine that can be entered in various types of competition events by an owner-rider. The engine is basically the time-tried 101 engine but with the marked improvements of better designed cylinders and dry sump oiling. The Pony Scout is intended as an economical utility machine. Both types are basically designed as resurrected Prince models, utilizing many Prince cycle parts as well as the Prince clutch and gearbox. The Motoplane aims for the more sporty type of Indian rider, who is not satisfied with the heavy Standard Scout that has superseded the much lamented 101 model for 1932.
However, frame and forks of the Motoplane prove to be to light for the lively engine so it is decided to design a much stronger rolling chassis around the 750cc engine. This new “Sport Scout” is introduced by the end of 1934 and it will become a very successful model for Indian, remaining in production till 1941. The Sport Scout has a distinctly European look with its diamond frame and girder forks and is a handsome machine with its streamlined mudguards. The new frame improves the machine’s ground clearance, and contributes to the Sport Scout weighing in at only 175 kg. This, combined with a wheelbase of only 1435 mm, makes the Sport Scout a remarkably agile motorcycle, and a favourite mount for many Indian enthousiasts. Yearly improvements keep the Sport Scout up to date, to name a few: for 1936 a larger capacity oil pump is introduced and 1937 models get a forward-placed gear lever, hi-lo headlight with prefocus bulb and a “Y” engine, with larger cooling surface cylinders, aluminium heads and Y-shaped inlet manifold. Model year 1938 sees the introduction of the polished aluminium instrument Panel with Corbin speedo, switch and ammeter and bigger cooling fins on cylinders and heads. 1939-model changes are a longer exhaust and a new front fork with barrel-type spring.

In 1930, Indian merged with Du Pont Motors. Thanks to DuPont’s paint industry connections riders could take advantage of a whole range of colors for their motorcycle. The 1939 sales brochure mentions: Seven colors or combinations optional including plain and metallic enamels. Special colors at extra cost.

This matching-number Sport Scout has been restored and is in fine condition throughout.