Difference between revisions of "Yamaha TD3"

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==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.

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 [[crankcase]]s 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.

Difference between revisions of "Yamaha TD3"

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 ==Intro==
-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.
+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 [[crankcase]]s 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.