Made only for two years, the TX750 was Yamaha’s attempt of creating a parallel twin with the smoothness of an inline four engine. Using a pair of balancers (called Omni-Phase), it eliminated vibration to a level never seen before in a twin.
Cycle World reviewed it and heaped praised on the TX750. “The result is smoothness beyond belief…shut your eyes and you are on a four. It couldn’t be a twin.”
That wasn’t the only thing ahead of its time – it even had a warning indicator on the dashboard for brake pad wear! Unfortunately, as occasionally happens with pioneering technology, the Omni-Phase balancer started to suffer from massive failures. Even though Yamaha was able to repair bikes and develop an improved design quickly, the bike was given a reputation for poor design. Though everything was fixed the next year the 1974 model did not suffer from reliability issues, sales plummeted and the bike was canned. The 750cc parallel twin engine produced 63 horsepower, which propelled this 518 pound bike up to a top speed of 95 miles per hour.
The seller of this example says that he’s done “all the reliability updates (extended sump, adjustable balance chain tensioner, factory custom fit oil cooler, etc.) that the factory sent out, and it runs strong and reliable.” In addition, it’s got new tubes/tires, chain/sprockets, wheel bearings, air filter, fork tubes, battery, and more. The seller is a professional mechanic who has gone through the bike and says everything works. The bodywork was repainted but the frame paint is original. He bought it in 2009 from a fundraiser auction and has kept it in a climate controlled facility since.
Find this TX for sale in New Hampshire for $4,000 here on ADVRider. Note that the seller is offering free delivery between New Hampshire and Florida!