• Jan 21st 2011 at 7:57AM
  • 15
Australia's Team Catavolt have lofted their slouch hats into the eFX / TTXGP electric motorcycle road racing ring in an intriguing announcement. Not only is the move a radical change from their usual land-speed-records-on-salt-flats activity, the EnerTrac Corp. motor for this new racing machine is somewhat radically located in the hub of the back wheel.

Electric wheel hub motors have most successfully been integrated into bicycles and the tech worked well enough for Vectrix to use in their maxi-scooter, but an electric race bike? While we're sure there are no end to naysayers – not enough top end speed, handling deficit due to unsprung mass, etcetera – signed up for three races, the team will certainly have ample opportunity to answer critics with results. Hopefully good ones.

The bike chassis they seem to be adapting (if clues left on their FaceBook page are to be believed) is the Korean steel-framed Daelim VJF250. Of course, with no motor in the way, the team should have plenty of space to hold a battery pack and controller. The motor in its stock configuration quietly (very quietly) boasts 10 kW of continuous power with a 30 kW peak and has seen customer's conversions reach speeds of 84.5 miles per hour (136 km/h). The example in the Catavolt entry is likely to be beefed up a bit.

Even without wins, the eFX / TTXGP participation seems a no-lose proposition for EnerTrac, giving their DIY conversion product world-wide exposure. Besides this race bike, the motor has found its way into motocross bikes, a batteried bobber and a tilting tricycle.

[Source: EnerTrac Corporation]
Show full PR text
EnerTrac the Motorcycle Hub motor company sponsors team Catavolt in the TTXGP series

Team Catavolt an Australian racing team and EnerTrac corp a Manufacturer of high power in wheel motorcycle hub motors have entered into an agreement in which team catavolt will use the Enertrac 600 series products it the TTXGP E-motorcycle races

PRLog (Press Release) – Jan 11, 2011 – Team Catavolt (see link below) an established racing group with electric land speed records to there credit has announced that EnerTrac Corp.
will be the exclusive supplier of motors for Catavolt race bikes in the TTXGP racing series. EnerTrac Corp. (see link below) designs, builds and sells high performance motorcycle in wheel motors (hub Motors). EnerTrac experience with high power hub motors with power levers greater than 30KW peak and Catavolt racing and electric motorcycle building experience will create an amazing racing motorcycle.

By having the motor in the rear wheel of the motorcycle, the engine bay is freed up to carry the maximum amount of batteries possible, this design also allow the batteries to be located low on the bike.

Team Catavolt recognizes the technical advantages of the EnerTrac hub motor drive and the engineering freedom it offers. Keeping the batteries low on the bike give a strong handling advantage.

Catavolt plans on entering three TTXGP races this season
Round 1: Eastern Creek Raceway (NSW) 1st - 3rd July 2011
Round 2: Winton Raceway (VIC) 2nd - 4th September 2011
Round 3 Wakefield Park Raceway (NSW), 8-9th October 2011 TBC

The joint effort of Catavolt and EnerTrac will produce an exciting and competitive race motorcycle.

visit http://www.catavolt.com.au/
A premiere Australian racing team with land speed records to their credit

EnerTrac corp:
46 Commerce Drive
Farmingdale, NY 11735
631 406-6583

Designs and Manufactures Motorcycle hub Motors, related components and custom Electric motorcycles for the conversion and OEM markets. EnerTrac's hub motors are designed for motorcycle wheels from 16 to 21 inches.

# # #

EnerTrac sells Motorcycle Hub motors and related components. We welcome any qualified builder, be it hobbyists' or OEMs' to explore using EnerTrac products to build Electric motorcycles that are fast and fun to ride.

It is often the case, that EnerTrac can save the OEM huge dollars in R&D and offer a domestic parts warranty. Currently EnerTrac targets full size motorcycles in the light to mid-weight category, with a wheel size between 16 to 21 inches. EnerTrac has done extensive modifications to the standard motor for OEM use and can turn the stock motor into an OEM specific design.
EneraTrac is Located in New York and can be reached at

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    • 1 Second Ago
      • 4 Years Ago
      I was going to ask how the motor manages to deliver torque against a mounting (simple bolts on the end the hub) which was not meant to be torqued against.

      But then I saw the big U bolt on the fork in the picture. Awfully low tech, but I'm sure it does the job.
      • 4 Years Ago
      Hell yeah Mark. Way to go. I hope they do good with your hubmotor.
      • 4 Years Ago
      A thought that leaps immediately to my mind is: they should put one of these on the front wheel as well; for regenerative braking! With a low "stiction" suspension like BMW's Telelever, or the Britten's girder fork, the added unsprung weight could be mostly negated, and it would most certainly weigh a lot less than the Yates system.

      Also, there is virtually zero "transmission" losses, and a lot of space is opened up within the lower part of the chassis... Hmmm.

      • 4 Years Ago
      Too bad that vintage spoke wheel just looks stupid on modern bike.
      • 4 Years Ago
      well chip yates went twice that top speed.
      I'm not concerned with unsprung mass but torque. it's not impossible but it would have to be aggressively designed and I think with a planet gear inside like bicicycle hubs wheels also seem to have. probably have to be the full size of the wheelhub, not just the center.

      on another note, it's curious that racing bikes are not more concerned with aerodrag. a bike has horrendous aerodynamics and at high speed maybe 95%+ of the power is wasted on the air. I think it could be improved by factor 5-10 with a few pieces of bodywork.
        • 4 Years Ago
        nah they do it to kill themselves but maybe in the meantime some of them want to win a race or two :)
        I believe it can be done with quite potent effect.

        and for once you are correct :)
        • 4 Years Ago
        For once I agree with you Dan. Motorcycles do indeed have horrible aerodynamics. Unfortunately, to significantly reduce the drag of modern sport-bikes would require a fairly substantial amount of fairings to either enclose the rider, add a tail, or both. As a rider myself I know the sentiment most riders take to this school of thought - it pretty much defeats the purpose of riding! After all, the open air experience is why many people ride, so an enclosed bike is pretty much a non-starter.
      • 4 Years Ago
      I like the idea of a hub motor; such a clean setup. Too bad the motor is only 10kW, aka 13hp.
        • 4 Years Ago
        umm, look at their website. you think i just pull that number out of my ass?
        • 4 Years Ago
        This motor is going to be way more than 10KW
        • 4 Years Ago
        Point taken.
        • 4 Years Ago
        10KW is the power it can handle continuously without overheating. It clearly states that it can handle 30KW pulses, I'd guess for up to 30 seconds. 30KW at 85% efficiency is 34 horsepower. In drag racing, electric motors are often pulsed up to 10 times their continuous rating.

        One thing to be aware of is that electric motors are rated for continuous operation, whereas gasoline engines are rated at peak power. The rule of thumb for comparing electric to gasoline horsepower is 3:1.
        • 4 Years Ago
        well- recently I saw how someone put two of them back to back on the same hub. this would be about 20kW or ~ 26 HP and thats getting close! for a commuter... for fun
      • 4 Years Ago
      i've thought at something like that, as in this pic: http://farm6.static.flickr.com/5163/5376110250_4f06e0eec1.jpg
      a big motor in the rear wheel, a little one in the front one as regenerative braking but also to help stability on dirty or slippery surfaces, just to help the bike to stay vertical ;-), a big box with battery and electronics, detachable for battery maintenance and/or battery upgrade (one box for every day use, a bigger and more powerful for track days ;-))
      or the same powerplant and many different frames: the roadie one, the cafe' one (like this), and so on, one powerplant for many models :-)
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