No, I wouldn't use those batteries with either motor. They probaly do not put out enough current for either the MTB or FK180 motors (especially the 180s). Also they say they are protected cells. So good news is they probably won't blow up. Bad news is they will probably shut down if you try to use them.
That kysan motor is metal-brushed (not carbon), so durability may be an issue. The windings should be the same as the FK180SH-3240, but if they use crappy magnets the motor may not be as powerful.
FK180SH-3240 are also sold as a replacement for "Blade" helicopters. The part number is EFLH1210 or EFLH1211. See more details here. You can find them in small quantities on ebay and maybe on some R/C hobby sites.
Also MTB Rhinos (and Honeybadgers) spin fast enough that they will give all the performance (range/FPS) that FK180s will. They also have sufficient torque to get your flywheels up to speed quickly and maintain that speed during high rates of fire.
FK180s do have superior torque, though, and may get your flywheels up to speed even faster. Similarly, they have absolutely no trouble maintaining that speed during high rate of fire.
So FK180s are somewhat better but are harder/more expensive to get and require shell modification. Up to you which one you want to go for.
Edited by jwasko, 28 April 2016 - 08:18 PM.