Not mx track capable, that's ok with me. I would use it for woods trails and sand dunes. Can you offer a comparison bike if you have spent some time on other gas bikes offroad. For example, have you ridden a Klx300, CRF230F, or TTR250 in woods? Is the handling close to those? Those are trail bikes not mx bikes, so maybe handling is close? The 2014 has the same size 43mm fork as the klx300 I think, but the zero shock appears to be a step down. So maybe some place similar to these bikes? Gliding through the forest in silence does sound very appealing to me.
I currently own a Yamaha WR250R and I always take the Zero FX over it unless I need to go farther than the FX will travel. I have owned KLR650s, TW200, XT250, and some bigger dual sports. I have also ridden TTR125, KLX250, and a variety of other bikes with friends. I prefer bikes with lights as I hate trailering a good motorcycle so I would rather ride a little pavement to link up some good trails.
In terms of suspension and frame the WR250R has the FX beat hands down. The suspension is more progressive, smoother, and the frame and head bearings on the WR are top notch and very solid. That little bike is built like a tank. Yamaha has been building motorcycles for a lot of years and they know what they are doing.
The power train and power delivery on the WR is excellent for a Gas bike (fuel injected, 6 speed) but it seems primitive after riding the FX where there is no shifting, clutching, lurching, climbing up the power curve. With the FX you just dial up how ever much power and speed you want and it is so smooth, fast and perfect that it is no contest in terms of power delivery. In a drag race the FX will destroy the WR as it has way more thrust and there is no shifting to cause the acceleration rush to stall. The challenge with the FX is keeping the front wheel down in terms of rapid acceleration.
As far as weight balance goes I prefer the FX slightly over the WR. I have not ridden the FX with one battery pack but that would make it really light. Riding the FX on tight trails is really fun and it feels like a big mountain bike. When things are really tight the no transmission, linear power thing is like an easy button to overcome steep climbs and sudden changes in speed. Taking all of those things away I find that I can just focus on riding and body english. In those terms, I prefer the handling of the FX overall, even though my WR has far superior suspension.
The Fast Ace Suspension components get better every year but they are not on par with most higher quality Japanese bikes like the WR which has fully adjustable suspension and progressive springs and linkage arms. I am sure that Zero goes with Fast Ace to hit a price point and I can see that. If the FX were much more I would not be riding it. They have some real challenges to overcome in battery and motor cost and I think that they have hit a nice balance and build a quality motorcycle now at a price that gives some mass market reach.
I love my WR250R, it is an excellent motorcycle for all kinds of dual sport adventure riding but I still prefer the FX if it can reach my target destination.