My friend owned the Egli TZ 750 which Goose Muir rode to a win in the Australian Swann Series in about 1978. I never rode the bike, however another close friend did. He said it was very torquey, however it made the end of the front straight at Calder Raceway look very narrow. As far as I know, the TZ700 had reed valves, as did the TZ750. I think the difference was a slight increase in bore size. The TZ700 had dual rear shocks, the TZ750 was monoshock ? Another friend was sponsored on a TZ700. I was told that he had tried the bike with two TZ350 barrels fitted, however when I asked him about that, he denied it had ever happened. When you think about it, that combination would be horrendous. A TZ350 usually has nothing under 8000 RPM, then you get everything. Apparently the TZ750 is very easy to ride. It would make sense if the very first TZ700 was piston ported, but I don't think that is what we had in Australia, and back then we got most things first.