Frame Size?

I currently have an ’05 Bruin 4×4. I’m finally looking to upgrade to something with a little more power mostly to gain a little speed and power when I have my Tatou 4s tracks on in the winter months. My issue is I really dont want to increase the size of my ATV frame. Any one know how much larger cc from my 350 can I go before the frame size increases.
Cheers