Expect 71 stock, 75 at the most with big 3 mods. Carbs probably need a good cleaning. Or speed limiter is acting up. Have your sprockets been changed? If mods have been installed, you may be jetted wrong.
110kph is 60 mph, so I think you may have problem. I may be wrong.
My reverse knob is tricky as well.....It broke, and I zip tied it back down.