you will have to get a 11 inch wheel tire for the rear, OR BUY new 12 inch wheels for the rear of your atv(and you will need wheels of correct off set and stud hole spacing)
the last number in a tire size is the wheel size, they have to be the same as what size wheels you have
HONDA< for unknown reason, seems to like to still use 11 inch wheels ?/
NEXT< ALL Aftermarket wheels will have different off set, than a OEM honda wheel, making the tires stick out slightly PAST your fenders, making mud and such fly a little more than stock set up!
NOW< if your looking for a different tire, and NOT pushing them, you CAN buy 11 inch wheel tires, just NOT very many out there to pick from
I run Titan 589's and they |MAKE them in sized still for an 11 inch wheel
been a super long wearing tire and good all over, a little stiff and heavy, but a solid tire, mine are on 11 inch wheels now and 10+ yrs old, 5,000+ miles and at about 50% tread left!
work well in snow and mud, and no complaints on trails?? 10 yrs on flat, from a 4 inch nail?? doubt any tire would have stopped that LOL
here is a link to them
as for the taller size too, going an inch taller, should be much of a big deal at all on handling and or power, just a slight difference
and you will ONLY gain a 1/2 inch of ground clearance, pending HOW true your OEM tires are to 24's and how true the 25's are
as NOT all tire company's are very accurate on REAL sizes of things , many SO called 25's might ONLY be 24 and so,me MIGHT be 26 inches??
but on average, going from a stock 24 to a 25, is NO big deal!
just need right sized wheels and tires to fit!