what should i expect this to do for my yamaha bruin with 26 inch mudlites. cause it lacks the power to spin the wheels in 4 wheel drive if you pin her from a stand still unlike 2 wheel drive.

 

I would get the over size tires kit because it will raise the engagement rpm and get you farther into the power band before it kicks in. You will loose a little top end speed (1or 2mph), but I wouldn't worry about that too much if you are mudding alot. I would do a K&N power kit also. If it does as much as it did with my griz, then you will be very happy. I really like what the EPI clutch kit did for me. I even bought lighter weights so I could get more low end grunt if I decide to go with bigger tires.