some other stuff
JAP Year Letters:-
P - 1920, 1940
N - 1921, 1941
E - 1922, 1942
U - 1923, 1943
M - 1924, 1944
A - 1925, 1945
T - 1926, 1946
I - 1927, 1947
C - 1928, 1948
S - 1929, 1949
W - 1930, 1950
H - 1931, 1951
Y - 1932, 1952
Z - 1933, 1953
D - 1934, 1954
R - 1935, 1955
V - 1936, 1956
F - 1937, 1957
O - 1938, 1958
G - 1939, 1959
the first 10 letters spell PNEUMATICS, I expect the next 9 would have spelt HYDRAULICS, but they'd already used up some of the letters....
Model 0 (34cc) Two Stroke
Model 2A (98cc) Four Stroke
Model 2S (98cc) Four Stroke
Model 4F (186cc) Four Stroke
Model 4/2 (245cc) 2.4bhp @ 2400rpm, Wico Mag A576BZ Four Stroke
Model 4/3 (288cc) 3.5bhp @ 2400rpm, Wico Mag CJ936 Four Stroke
Model 5 (412cc) 4.5bhp @ 2200rpm, Wico Mag CJ936 Four Stroke
Model 6 (588cc) 5.5bhp @ 1800rpm, Wico Mag CJ936 Four Stroke
Model 55 (824cc) (V-twin) 8bhp @ 2000rpm, Wico Mag Four Stroke
