I have a 25 ULA , however I am not sure about the size of your bikes.
I haul a golf cart or a full size Polaris ranger 800. The ranger does fit, the only problem is the roll cage gets pretty close to the overhead cabinets, probably a non issue in your case. It does measure out at around 9' long.
My best advice to you is, pay close attention to the width between the microwave and the opposite wall, This is the most narrow part. And the short side, which is also the microwave (drivers) side... Overall it is a fairly large space.
Other than that .... We love our 25ula, had it for over 2 years !!