The F21M was the descendant of the famous 1963 125cc Kawasaki B8M "Red Tank Furore" where the B8M all took the top 6 positions in the Hyogo Prefecture Motocross Tournament in Hyogo, Japan.
The F21M was rare in North America as not many were imported.
- 2-Stroke, 1 Cylinder
- Rotary Disc Valve
- 4-Speed Return Shift
- Maximum Horsepower: N/A
- Fuel Tank: Maroon
- Front Fender: Chrome or Stainless steel