Friday, March 7, 2008


News: The R84 is officially NOT for sale any more and is being prepared for a re-configuration of the entire system. It is however a fine example of my shops capability's to build custom electric vehicles for all my clients needs. I will NOT however answer any advanced questions unless you have approved and made payment on a bid for a custom conversion from my shop. The battery range and speed capability's are NOT fully tested. What I can tell you is that the bike has decent zero to 60 acceleration and an approximate range of 40 miles on balancing controller coupled to the zivan charger. Here are some basic facts about the bike in the pictures:
R84:As pictured:
28cell lithium (LiFePo) 50ah 3.3v(nominal), AC induction drive, Curtis AC drive controller, Zivan charger and of course all aluminum battery frames. All this packed into a 2000 Yamaha R1. Custom built by me at my shop Graywrx Fabrication in West Oakland for Todd Kollin of Electric motor sport (also in West Oakland). For sales and custom vehicles email Justin Gray at: You can check out Todds web site at:

R144 the DC super bike

144vdc,48cell Lithium, with a Curtis 144vdc 550amp controller, running a 60kw series motor. This bike was custom built by myself for Todd Kollin of Electric Motorsport in Oakland, Ca. Unfortunately, this bike is not for sale. It is however, an example of the custom work that I produce out of my shop, Graywrx Fabrications. For more information please contact me at

rob has a great job at CASS