i have a 2006 rancher 350 es 4x4 and i was wondering what are good tires to put on it. also i was wondering if it was worth it to put an exhaust on it ( if so which one) and if i was going to have to jet it.

 

i have an 06 350 4x4 es with 27's mudlites with 14 in rims with the hmf pipe and 145 jet in heavy mud 2nd gear is a lil slugish but 1st gear is a beast i put on a 2in lift and have 15in ground clearance the set up works great on my bike

 

I have mud lite XTR radials, great all round tire. Based on the above I'd go with 26's to have a little better power in 2nd gear in the mud. My 450 foreman turns my 27's no problem in 2nd gear in the deep and dirty.