Yamaha TX750

Yamaha TX750

The TX750 was a Yamaha motorcycle made in 1973 and 1974. It was loosely based on the XS650 but had what Yamaha called an "Omni-Phase balancer" to counter vibrations which are inherent in a parallel twin with the crankshaft set at 360 degrees (both pistons rise at the same time). Using a pair of balancers (one to stabilize the imbalance of the cylinders, the other to counter the rocking caused by the first balancer), Yamaha’s Omni-Phase balancer essentially eliminated vibration in the TX750, producing a smooth ride previously thought possible only in a triple or a four cylinder. This new system was a first for a Motorcycle but resulted in massive failures for the first model year. Although, these problems were fixed in 1974 sales never picked up and the machine was shelved.