Over 200 MPH,depending the track
The official top speed of a MotoGP bike is 349.228kph (~216.55mph). It was set in Mugello by Dani Pedrosa in 2009. The previous record of 343kph was held by Makoto Tamada at the Shanghai circuit back in 2006 on a 990cc Honda. http://www.motogp.com/en/news/2009/Pedrosa+top+speed+record+mugello
There's really no telling. Depends on how tuned the engine is, if the bike is styled like a road bike or a dirt bike, if it's geared for acceleration or top speed, and on how aerodynamic bike + rider can become.
There is no such thing as 20 mph acceleration. 20 mph is a velocity. Acceleration is expressed as velocity per unit time e.g. mph per second or mph per minute etc.
This depends on what it is in, how big the tires are, how much you way, if it has a transmission and what kind of gearing you gave. Say it is in a mini bike with a single speed, you could gear in to do over 40 mph but you will have slow acceleration. Or gear it for 30 mph and you will have a little of both. But if you have a multi speed transmission, you could get over 43 mph and have decent acceleration.
This depends on conditions, rider weight and bike the bikes condition, but this would take about 10 seconds on average.
50 mph to 80 mph it depends upon bike.
50 mph to 80 mph it depends upon bike.
-10 mph/sec
The amount of MPH you can go on this bike is solely based on how fast you pedal. You can probably reach a maximum of around 20 to 25 MPH, though.
about 45 mph to 50 mph
how fast can a 250cc quad bike go in mph