tires and rims 1987 fourtrax 2×4

Hi everyone
Was wondering my tires on my 87 fourtrax are the 25x 12×09 rim as the tires for the 9 inch rims are getting harder to find what would be the rim in a larger size and tire size be that i can use on my 4 wheeler i Beleive they are 4 x110 from the 1987 honda 4 trax 2×4 4 wheelers Any help would be greatly appreciated Gee PS would i need to change the front tires if i put a larger tire and rim on the back front tires are stock ones from 87