No car or dirt bike has an external combustion engine. All cars and dirt bikes have internal combustion engines, except for a limited amount those vehicles that are powered only by batteries and electric motors.
Combustion Engines can be made either air-cooled or water-cooled. Radiators are only needed for water-cooled Engines. Small two stroke Engines are used in Bikes.On that external surface Fin type arrangement is made.This is enough to dissipate the heat from the engine as which is small
There are electric bikes(which usually legally are considered bicycles) and there are bikes with combustion engines.(which usually are seen as either scooters/mopeds or motorcycles by the law.) For the combustion engines you can have either 2-stroke engines(which usually are fairly small) or 4-stroke engines. You can have one cylinder, or several. Then there are a few custom builds with turbine engines and the occasional drag/showbike with jet, or rocket engines. Most bikes run on gasoline, but there are Diesel bikes too.
150cc is a measure of cylinder volume for combustion Engines. Doesn't make sens to ask for a 150 cc Electric road bike. Unless you want a hybrid, dual drivetrain vehicle.
A bike
Bike gas engines offer advantages such as cost-effectiveness, environmental friendliness, and ease of maintenance compared to other types of engines for transportation.
An internal hub bike offers advantages such as low maintenance, protection from elements, and ease of use compared to a traditional bike with external gears.
The air suction valve is designed to reduce gas emission in combustion engines. Also known as a PAV, or pulsed air valve, the valves work on their own in the exhaust system and need no maintenace from the bike owner. The valve can be removed but then the bike's emission may not fulfill the criteria of air pollution regulations, for example in California.
an engine needs a primemover force to start. that is, a sufficient-initial external force. thats why, we kick the kicker of the bike inorder to put it an external starting force. in case of self starting engines, also in cars, there is a starter motor to give up this external starting torque when we push the ignition switch or the ignition key.
All internal combustion engines consume fuel. However excessive fuel consumption can be caused by a Carburetor that is flooding. It can also be caused by a leaky gas line or fitting. Fuel comsumption is directly proportionate to how hard the bike is ridden, and how much weight is on the machine.
100hrs
http://www.oldminibikes.com/forum - check out the engines section
Opens and closes the intake and exhaust valves.