350cc or 500cc ?

You have me doubting that point, now that you have mentioned it. I have always thought it was a 500 for some reason.

I shall endeavour to find out more.

Malcolm.



Unfortunately, also the powerful and beautiful "Typ-673" four cylinders (four pics above) -always two strokes, 80 hp, 270 km/h in the last version of the 1971!- was a "killer bike": the great English rider Bill Ivy lost his life because of the same cause (the seizing of a piston, that caused the blocking of the bike).

Unfortunately, the quality of the steel used for the engine was very poor, and caused these tragic events. This was a shame, because the "Typ-673" was the highest Jawa's expression for the GP competitions, with an advanced liquid-cooled V4 engine equipped with rotating valves (technology used also by the MZ).

After these accidents, the Western drivers left the Czechoslovakian team, although the bikes were competitive and fast.