Received a letter with stickers today from Kawi stating rear cages and seats will void warrenty and cause the vehicle to roll over.I purchased the rear cage with the vehicle new from Kawi and am wondering if this will be a warranty issue.I carry four people alot and never lifted a wheel but dont want the warranty voidage....any suggestions

You didn't purchase a rear cage from Kawi! If you bought it that way the dealer put it on! The stickers so that you cannot put a lawsuit against kawi for having four seats in it! Yamaha has been through the same hoops!