Not putting down your bike, but since you asked:
- Better lighting
- Better range
- Better (more polished) looks
- Better brakes, probably
On the minus side, one can’t “ride the loophole” with these Kawasakis, which means a higher cost of ownership through taxes.
This is the kind of conversation I've been thinking about for a long time. I don't think the major motorcycle factory's realize this yet. For a minute lets assume you're a salesman at the Kawasaki shop trying to convince me I need a Ze1, and you just gave me this pitch. My reply would be something like this.
Better lighting? Maybe, maybe not, but I can have any lighting I want for cheap, and I like what I have pretty well. No sale.
Better range? Ze1=41 mi. I get that riding hard, and a lot more most of the time. Still no sale.
Better looks? Looks are subjective, but I'll give you this one, but not by very much, and even that's questionable. I have been known to buy a bike for looks alone, but I've never been a fan of Japanese sport bike looks. Still no sale.
Better brakes? Ze1 has 4 piston F/R with 270/220 rotors, but has to stop close to 300 lbs plus rider. I have 4 piston F, 2 piston R, with 220 rotors F/R, stopping 120 lbs plus rider. I'm pretty sure I can out stop a Ze1.
Other items of note, Ze1 has 41mm forks that have to deal with 300lbs plus rider, while I have Fox 40s holding up 1/3 the weight. Ze1 has a strong, but heavy steel trellis frame. My bike has a strong, but lightweight chromoly, monocoque frame.
Right now the only real advantage I see is price. $7200 vs $10,000, but it's not really a fair comparison, because we're comparing a mega factory to a very small regional one in Australia. If a factory the size of Kawasaki built my bike I think it would probably cost less than this Ze1. Even so, when you factor in the additional freedom the loop hole allows, which means I can ride anywhere, park anywhere, no license, no registration, inspection, or insurance, I think the extra cost is worth it.
Bottom line is the Ze1 weighs 300 lbs, but only has the same power as my 120 lb bike, arguably less overall performance, and less freedom. I don't think the Ze1 would be as much fun as my bike.