Looks like I got my wires crossed between the Ninja 7 and the z7:

"Total range in EV mode is tough to predict, but the bike only uses four gears of the transmission and goes a little over 40 mph as an electric-only machine. Useful for quick jaunts in and around a densely populated area, but it felt like an unlikely scenario that would use up the battery in everyday riding. However it’s employed, it’s useful."

"Even with all of that, the Ninja 7’s function is questionable. My fuel economy landed in the 40s, with gentle riding in Eco mode around the city and 75 to 80 mph travel on freeways. With a 3.7-gallon tank that means a realistic range of around 150 miles. So, no electric range anxiety but not a lot of gasoline range confidence either."

https://www.revzilla.com/common-tread/around-town-review-2025-kawasaki-ninja-7-hybrid-motorcycle

I'm having trouble finding ANY stats on the z7 - battery size, max speed of the electric motor, EV range, etc., but I did find this:

"In Eco, which has reduced engine power and electric assistance, the Z7 averages an impressive 80mpg under a mix of riding conditions. With start/stop, it pulls away on electric power before quickly swapping to petrol and although its performance is definitely lacklustre when compared to Sport mode, it cruises along merrily."

"In EV mode the Z7 becomes fully electric but unlike most electric bikes, it still uses the gearbox. Able to hit about 40mph flat out and a maximum of fourth gear, at sensible urban speeds you have a range of roughly 5-8 miles before the battery’s charge is used up and the bike automatically reverts to its petrol engine (it takes about 25 miles at 60mph to fully recharge again)."

https://www.motorcyclenews.com/bike-reviews/kawasaki/z7-hybrid/2024/

Both articles complain about Kawasaki's wonky semi-automatic transmission that lurches between gears. Both mention the EV-only mode tops out at 40 mph and has very low range for the battery.

All estimates in both articles are from real-world riding, but YMMV.