When Indian restarted civilian production in 1946 they produced the Chief only; the Junior Scout, Sport Scout, and Four were discontinued.
Engineering work being done on a Model 647 Scout was abandoned in favor of developing a completely new line of lightweight single-cylinder and vertical-twin motorcycles.

In 1948, Indian built 50 units of the 648 Sport Scout.
The 648, also called the "Big Base" Scout, was a homologation special built to qualify the type for racing; as such, it was sold primarily to motorcycle racers.
 Floyd Emde rode a 648 to victory in the 1948 Daytona 200.
The 648 was the last traditional Indian Scout.

Introduced in 1949, Indian's line of modular-engined standard motorcycles included the straight-twin 249 Scout.
The 249 Scout was replaced by the larger-engined 250 Warrior the next year.
The 1949 Scout Model 249 had a 436 cc (26.6 cu in) vertical twin, with a bore and stroke of 2 ³⁄₈ in × 3 in (60 mm × 76 mm).
To better compete with European 500 cc (31 cu in) class twins, the same engine was enlarged to 500 cc, introduced in 1951 as the Warrior.
When Indian restarted civilian production in 1946 they produced the Chief only; the Junior Scout, Sport Scout, and Four were discontinued. Engineering work being done on a Model 647 Scout was abandoned in favor of developing a completely new line of lightweight single-cylinder and vertical-twin motorcycles.
In 1948, Indian built 50 units of the 648 Sport Scout. The 648, also called the "Big Base" Scout, was a homologation special built to qualify the type for racing; as such, it was sold primarily to motorcycle racers.  Floyd Emde rode a 648 to victory in the 1948 Daytona 200. The 648 was the last traditional Indian Scout.
Introduced in 1949, Indian's line of modular-engined standard motorcycles included the straight-twin 249 Scout. The 249 Scout was replaced by the larger-engined 250 Warrior the next year. The 1949 Scout Model 249 had a 436 cc (26.6 cu in) vertical twin, with a bore and stroke of 2 ³⁄₈ in × 3 in (60 mm × 76 mm). To better compete with European 500 cc (31 cu in) class twins, the same engine was enlarged to 500 cc, introduced in 1951 as the Warrior.
Indian Scout (motorcycle)