I ride my 2006 Electra-X all the time at 70mph GPS, 74 indicated. But that is only for 40 to 60 miles at a time, depending on which larger city I'm traveling too. I have de-restricted the exhaust and the airbox and added a K&N filter to the modified airbox. I also re-jetted the carburetor slightly on the rich side. This helped cool the engine down between 40 and 60 degrees Fahrenheit on average. Heat is your enemy wit any air cooled engine. It tops out at a actual 82 mph by GPS, and will run up to 78mph GPS very quickly where it runs out of carburetor. It still has the stock 29mm unit.
Ambient air temperature is also a consideration. Hot days require moderation on air cooled engines. This would be a logical process.
Quote from: cyrusb on December 11, 2007, 08:20:22 PMNo. I respectfully disagree. The minium Interstate speed (in Kansas anyway) is 40mph. Get out there and maintain your rights! Seriously though......I would rather do 55 on the Interstate where everyone can pass than try and do 55 on some of the 65mph two lanes we have around here. People don't seem to know how to pass, they can have a half mile of clear road and they won't pass. I think it must have something to do with my bad ass biker appearance.