Originally Posted by tsunami59 
I have ridden my buddies cat650 and i have a polaris 500efi and his cat out preforms my 500. The 650 is running a clutch kit and a chip. It has very good low end and pulls very hard all the way to max. I like the way it runs, its very powerfull but not insane.
well if the 650 cat is getting cleaned up on by a 300 u definetly have issues. unless ur talking about a 300 trx sport or something like that the 650 is not a top end machine..but iv had 3 of them and i would be getting passed by any 3oo on a bad day....just saying...
maybe more info...would help with diagnostics ....
T