In the end of 1946, a special racing motorcycle was assembled at the factory in Caschina Costa. Its main advantages over the serial model 98 were a telescopic fork and a plunger type rear suspension. The frame remained a simple tubular (closed type) and was shortened by 50 mm to improve the handling. The handle bar was narrowed and the rearsets were moved back to make a sportier riding position. The two-stroke engine was improved by enlarging the cylinders ports, raising the compression ratio and installing a new 20 mm horizontal carburetor. The number of gears was increased from 2 to 3. As a result, the power increased to 5 hp at 5,400 rpm, and the maximum speed increased to 95 km/h.