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From what I can tell the 455 has a smaller bore then the 497 and that's the main difference, they have different jetting also but the bore is the biggest difference, same engine...smaller bore basically
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2011 Polaris Sportsman 500 HO
6000K HID's,Kimpex fender guards,foot pegs,rear seat,Polaris Front/Rear bumpers,2500lb winch,Handguards,ITP SS 12" 212 machined wheels,ITP Mudlite XL 26" tires,Highlifter springs Front/Rear,26" Outlaws,QSC clutch kit/Exhaust,UNI filter,Ricochet A-Arm guards...More coming soon...Kinda running out of stuff to buy though!
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