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My car has a Cougar controller, my motorcycle has an Alltrax, and my friend Chris is building a drive-shaft cycle with a Cougar controller (700 amp version!)
The additional voltage of the Cougar isn't a huge help on a cycle, because cycles are typically lower voltage than cars, just because of how many batteries you can physically fit.
I remember Ryland mentioning the idea a while back of doing kits or just building EV cycles for other people. A name-brand controller may help buyers being more accepting of it, especially having a warranty. I did have a problem once with the Alltrax controller (replaced for free under warranty - their fault - manufacturing defect) and a problem with my Cougar controller (my fault - I screwed up - I had to fix it)
On Chris' EV cycle, we may try to go with a fairly high pack voltage - which will make the cycle INSANELY fun!
In short, I think a stock Alltrax or Curtis would be better for turn-key, semi-mass produced cycles, and the Cougar better for Custom/Fun/Special cycles.
One thing important on an EV cycle is that you have adjustments for your controller throttle response!!!!
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