Upgrading tired foreman 400 for UTV

I’m new here so bare with me.

I have a 99 foreman 400 that I bought new from the dealer as a leftover in 2001 at 17 yrs old. It’s been a great machine but it’s now got close to 13k miles on it and nearly as many hours and I’ve been thinking of trading up. I really like the 500 pioneers because I ride very tight trails here in Kentucky and they are nearly the same width as the quads at 50 inches. I also like it because I think it can handle a Deer better. I won’t buy anything else but Honda so no Razr either . I like to get 10 plus years out of these things

The only concerns I have is will it have the same get up and go as my foreman has being that it’s only 100cc more with nearly twice the weight? Id like it to be atleast competitive to the foreman in terms of acceleration and pulling ability. I’d also like to add a 27 to 28 inch tire so how is the gearing? It appears to be low enough to spin them from what I have gathered but you never know what the real world will bring.