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The size or displacement of the engine, 50cc versus 125cc.
I bought one, it came from china. it was a 125cc dirt bike engine
The answer to this question is YES. The most popular Midbikes (super pocket bike) come stock with a 110cc motor. You can put a 110cc, 125cc, 140cc, 150cc, and even in some cases a 200cc into a Midbike. Just about anything and everything you want to know about these bikes can be found at Midbike Nation. I hope this helps answer the question.
a 125cc motorbike
Kawasaki is the best 125cc dirt bike. Hopefully this link will helps you.
a 125cc pit / stomp bike can reach limits of 70mph :)
A 125cc engine can go about 45 to 50 miles per hour. The standard horse power of a 125cc motor is 9 horsepower but can very depending on the model of bike.
in wonder the same thing like could i buy a 125cc engine from a dirt bike and put it in a mini sprint
no i cant turn a 50cc pitbike into a 125cc pit bike the bike will blow up .
The fastest 125cc bike is the Aprilia 125 RR. This bike can do 120mph and its 0-60 is 6 sekonds. the sekond fastest 125cc is the cagiva mito. This bike will do about 110mph. Its 0-6- is also 6 sekonds. both of the bikes have 35hp!
what causes a 125cc motor to smoke and burn oil ? and is it fixable
CC refers to the engine displacement or in other words how big the motor is. Larger cc engines produce more power then a low cc engine can. When racing dirt bikes they require the engine size to be near the same size so that everyone has an equal chance in the race. For example: Racing a 125cc bike against a 500cc bike would be a one sided race. The 125cc bike would not have a chance against the power a 500cc bike puts out.