Ideal speed for 100cc motorcycle

I own a 100cc bike and the quickest I ride at is around 60kph, even on the highway. I wanted to know what’s the fastest speed I should be doing so as to not affect engine life? Please help.
Ganesh, via helpline

AAA Yes, for cruising on the highway on a 100cc bike, your present speed of close to 60kph makes sense, using about 80 percent of the bike’s performance, as compared to pushing the bike at high speeds using 100 percent of its power frequently, which is unduly stressful for the engine.