The SOHC/4 World Tour is in under way.
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... BTW Roberts Yamaha made somewhere around 150 -170 hp, he rode it on the outer edge of the mile and was laying rubber most of the way. Exciting times, for sure..
The motor had to sit high in the frame to keep it from grounding in the turns which made it handle poorly.
Let's include those photos in this thread before the link begins to fail....-Alan
Chuck dont need oil. Engines run cause they are afraid of chuck!
The legend of Roberts and the TZ has jumped the shark....
...Also corner speeds quoted by the King were in the area of 120-125 not 150mph as someone was quoting on this forum. ...
The legend of Roberts and the TZ has jumped the shark. There were multi cylinders bikes on the mile well before the TZ700/750 ever showed up. BSA and Triumph had used the 3 cylinder motor in specialty framed trackers as soon as the rules allowed (1970). The TZ produced about 125 hp. Roberts wasn't pitching it sideways at 150 for sure. The rule change wasn't the reason the CB750 didn't succeed on the mile either. Like the 3 cylinder brits it was too wide. The motor had to sit high in the frame to keep it from grounding in the turns which made it handle poorly. The CB didn't have the low end power of the British and American twins either. Kel Carruthers (Roberts builder) spearheaded the move to ban the TZ from the mile. Roberts didn't destroy the competition at Indy 1975. He was at the rear and barely won on the final straight. He raced the bike two more times and didn't do very well. The TZ was a failure. If it wasn't banned it would have been abandoned just like the CB750 milers. The video of the Indy race has been pulled from youtube but it is funny to watch as KR goes wide in the turns. He was totally off the line and barely pulled out the victory.Scott