Polaris ATV Legend
Join Date: Feb 2009
Location: Washington State
i would like to agree with chopper. ill put it into my own words, so i'll basically be repeating what he said.
on the trails, your 500 is going to keep up with his 700. you have the advantage of a little weight saving, and slight faster reving motor with only one cylinder over his twin on the trails, because he cant really use its full potential. hell, even top speed really isnt too far off, but the 700 would have you probably by about 5-6 mph faster on a flat, dead straight away.
where the twin (700 or 800) really shines is its monster low end power. it makes an awful lot more power in the lower RPMs, and it makes quicker. it doesnt need the higher RPM like you do, because it has twice as many combustion strokes as you in the same amount of time. its going to climb objects better, its going to lug in a low RPM over super technical stuff better then your machine will.
now the difference between the 700 and 800 is even less. the 800 is everything the 700 is, and just a little more.
now, not trying to knock your 500. awesome machines. super reliable, bullet proof motor, and plenty of power for almost everyone, including myself. i believe the polaris 500 puts out the most horsepower of all the other manufactures 500 (or similar cc's), but i havent checked that out in awhile.
trail riding, both are very capable, very close in performance. working(snow plowing, farming, ect.), the twin handles it better with the extra weight and more low end torque.