The battery is under the driver's seat.
Under the driver's seat.
The Honda Nighthawk 750 is rated at 75 hp. The Honda Shadow Spirit 750 is rated at 60 hp. The Honda Shadow ACE 750 is rated at 43 hp.
YTZ12S from Yuasa
You can use, for example, a Yuasa YTZ14S motorcycle battery.
under the seat
This could be done with some minor modifications.
Buy a bigger bike!
That is the battery I have had in my 2005 Spirit 750 for two years with no problems.