and also a liquid cooled machine will put out more hp than an air cooled. its not 2 stroke or 4 stroke its liquid cooled or not. a 250 cc liquid cooled motor would KILL a mojave! so in conclusion a 2stroke is faster than a 4stroke. YET... a 4stroke is stronger than a 2stroke....... Think about it. why are all utililty atvs 4stroke? to pull things and work! and 2strokes???? WHY DID THEY START RACING THEM IN THE FIRST PLACE!!! HIGH REVS AND ACCELERATION!!! ONLY REASON WHY ITS LIKE IT IS NOW IS BECAUSE OF ENVIRONMENT REGULATIONS... 450S WOULD HAVE THEIR ASSES WALKED OVER IF 250 2STROKES WERE ALLOWED BACK IN THE GAMES... ESPECIALLY IF THEY HAD THE NEW HIGH TECH FRAMES LIKE THEY ARE MADE NOW A DAYS.