I want to get 27 inch Vampires for my Honda 300 Fourtrax, but not sure if it will fit. I currently have 26 inch Vampires.

 

First question is why?

Turn your wheels all the way in one direction if it looks like you still have 2 inches left you can put them on.

This cant be very productive for you quad. Those Bikes were not made to turn tires that big. I have a 99 and the 25's I have on it are enough.

you should stick with the 26's you are not gaining that much with 27's and the added stress on the bike is not worth it.