Remember the hydrostatic drive diesel and the hydrostatic drive 2WD trail bike? Well, Brian Okeefe, from Hydraulic Innovations wanted me to know he just finished his hydrostatic drive turbo diesel chopper. I’m not a big fan of the really long look but the technology is definitely interesting.
Brian uses the same 3 cylinder Kubota diesel engine Jeff Parker used in his diesel bike but added a turbo. Another change from Jeff’s bike is no foot pedal to operate the pump, this chopper is entirely automatic, just twist and go. No shifting, nothing. Speed up or slow down, the pump adjusts the stroke to always be in the appropriate range or “gear”.
It’s currently set up for a top speed of about 75 mph and Brian says he won’t win any drag races but it’s fast enough. The rear swing arm completely encloses the hydraulic drive motor and hydraulic lines which is why it looks a little bulky and fabricating it was the most time consuming part of the project. (Also, a seat pan was added since these photos were taken.)
Now suppose you took this same technology and built a bike with the dimensions of a Triumph Rocket 3, for instance, you would have a pretty interesting custom. There’s no real reason to put it into a chopper, anything large enough to hold the diesel engine and associated drive mechanism would work, even a Gold Wing type motorcycle would serve the purpose.
What will they build next? Guess we’ll have to wait and see but these bikes already built should give a few other builders some ideas if they want to try something a little different. Interesting.
Link: Hydraulic Innovations