I have a Dodge Police Pursuit Charger with a Hemi. The speedometer says it does 160mph, I've never had it over 90. I don't know if it does even 160, I'm never gonna try. But it gets to 60 or 80mph real freakin good! That's the effect I want with my minibike. Whether it actually does 60s or 80s is immaterial to me. I don't need to know, I don't want to hit the top speed ever.
Right now I'm getting top speed of 42.9mph on my minibike, but I hit that governor and surges back off and on again, jerking me around, which is very annoying and uncomfortable. It pisses me off. My whole reason for me to do the governor removal/billet trip is to smooth out the top end so it doesn't do that. And if I hit 50s so be it, it's only for a burst, but like moedog says, your average mini is probably not designed for all this speed and g force. Plus the brakes thing like Dakota says.
I'd sure hate to bite it on a minibike at 80!:no: