I am looking for a lighter upgrade for my DRZ400 for dualsport use without dropping power or reliability. I note stator and fuel tank upgrades are available for the KLX450 to permit brighter headlight and longer fuel range. The KLX450 dirtworthiness is obviously an improvement on the heavy DRZ. Can the KLX handle highway cruising at 60-70mph ? If the bike is used for dualsport touring, (not raced) how long would the motor last before needing a top end rebuild ? Apparently the KLX in Australia is street legal with a bigger headlight. Anyone using them for dualsport touring in Oz ?