my buddy has an old grizz or big bear ..something , the 400 with shaft drive , like a truck , drive shaft for the front and back . he wants more speed , hes got his up to 70 km but wants more. is there anything he can do? i told him the only thing would be new front and rear gear set up. its a standard 5 speed with all the time 4 wheel drive . thanks for your help

 

its a kodiak 400 shaft drive

 

About the only thing he can do is taller tires or gears, if they make such a thing. If he has the HP to pull it, the taller tire will give more speed.