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Difference between revisions of "Yamaha TD3"
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==Intro== | ==Intro== | ||
1972 saw the appearance of the last official “mass produced” air cooled [[Yamaha]] production 250cc roadracer, the Yamaha YDS7 based TD3. Overall it was a little disappointing. On paper it, and the 350 TR3, seemed a revelation with their dry clutches, new lighter frames, horizontally split crankcases in common with the 350 as well as an identical crank , 6 speed transmissions, with provision to allow sixth gear to be “blocked out” if rules required it, (though a 5 speed was released initially which also had a wet clutch), gear ratios changed as well. | |||
On the track the TD3 suffered chronic detonation problems which were extremely difficult to sort out**. Some of these problems may have stemmed from the un-reliability of newly fitted for this model CDI ignitions. | |||
34mm carbs appeared on spacer blocks. Changes to the motor included reduction in the height and width of the main transfers, increased width of secondary transfers, deepening and widening of the main inlet port, as well as the usual updated exhaust. Output jumped up 2bhp to 49@10,500rpm. | |||
==1972== | ==1972== | ||