Im going to have to agree with all of the above. If I was old and didnt go off trail ever, I'd pick the 550. I'd rather the 440 though. More power, most likely bigger track, stronger chassis, better throttle response...and just cooler all over.
Stick with the 440! A lot of power with that little 440 l/c. I just wanted to add that your suspention doesnt look setup correctly on the 440. Looks like the back end is down to far causing the front of the track to not even touch.
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