I'd guess the engine is overheating.
because it stops at a high rate of speed forcing the rider to fly forward
it has a governor or rev limiter which is there so you don't blow the engine up and the minibike is probably topped out on top speed at 70 anyways
The low-speed fan will come on when your engine temperature reaches 180 degrees. The high speed fan will come on. When the engine temperature reaches 200 degrees.
Amount of fuel burning is directly proportional to the amount of power produced. The power produced by the chemical reactions can be converted for producing the high torque or high speed of an engine. basically the speed of an engine will vary w.r.to the amount of fuel injection for a given engine geometry.
this could mean either that's all its got or there is a govenor on that vehicle which stops the car at a certain speed.
It has a top speed limiter. Once you reach that speed it will shut the engine off
The PCM limits the top speed of the vehicle by cutting back on the fuel if the engine RPM's are high enough to damage the engine
Before I start, I have to say, my English isn´t too good. Well, I have exactly the same model of scooter. I put a NGK iridium plug and I think the aceleration is better now. I change the belt, the pulley and the clutch and my final speed is now more high. But the old parts was worn. I buy the parts in this site: http://japan.webike.net/. They have many parts of this scooter, including engine parts to upgrade the engine, drivetrain, spark plugs, mufflers, etç.
yes it will.
By an auxiliary engine
If the a/c will not come on you need to check the a/c clutch relay and the following can cause the a/c to shut off..... When the accelerator pedal is fully depressed. When cranking the engine. At high engine speeds. When the engine coolant temperature becomes excessively high. When operating Power Steering during low engine speed or low vehicle speed. When engine speed is excessively low. When refrigerant pressure is excessively low or high.
3 words "made in china" i hardly notice mine anymore and i put in aftermarket parts, it still vibrates.