Project Yamaha TX750 Part 12 A question of balance…
If you have ever ridden a British 650 or 750 parallel twin you will know something about engine vibration. As a passenger it was even worse and I remember being unable to keep my feet on the foot-rests on occasions because the vibration was not just uncomfortable, but painful.
Another effect the vibration had was apparent on a friend’s Tiger 750 and that left a trail of loosened nuts and bolts behind it.
Maybe there was an engineering solution? Norton thought so in the mid-1960s when it introduced the Commando. The engine and rear suspension formed an assembly which was rubber mounted in the frame and this did work on mine. But the assembly needed careful setting up and could allow the engine to bounce up and down if there was a slight misfire.
A better solution would be to eliminate the
