WHAT DOES ENGINE BIKE EXHAUST MEAN?

100CC BICYCLE ENGINE Package: The four stroke engine offers a robust three.5HP horsepower, a displacement of 100cc, a rated power of 2kw/h, plus a max rotating speed of 3600RPM, which presents you with sturdy power and accelerates your bike into a max speed of 50km/h.Trying to keep within the legal Restrict of your condition signifies that you donâ