Verified answer

Yes. Motorcycles use gasoline and some type of burning method with combustion cranking.

Not all singles are two-stroke. British and Honda singles are often 4 cycle. Some 2 strokes are twins.

Most mopeds are single cylinder, 2 stroke. But, a lot of 2 stroke scooters and steret M/C's are no longer manufactured/imported into the US because of pollution problems. They were never technically banned, but only DiTechs , with fuel injection, could pass the stricter regs. Others would have needed to put cats on, so they started making 4 strokes. Chainsaws, leaf blowers, weed eaters, and boats are not affected. Older scooters and cycles aren't affected either.

The air is bad in SE Asia because of the two stroke scooters. Much of the world still hasn't restricted production of street 2 strokes.

4 strokes can be noisy, too. Ever hear a modified Harley? But that ring a ding chainsaw noise is peculiar to a two stroke. That Vrrm----Bub-Bub-Bub or Wharrrrrr is a four stroke.

The number of cylinders has nothing to do with how many stroke engine. A single cylinder can be either a pollution spewing 2 stroke or a much cleaner running 4 stroke.

Note: Many countries have banned the pollution spewing 2 stroke engine for street use. A small 2 stroke engine will spew more pollution into the atmosphere than a full size SUV that has proper emissions controls. I guess these countries that still allow the use of 2 stroke engines on the street either don't know or don't care what these engines do to the environment.

Where I live, all motorcycles,scooters, and mopeds sold since 1992 must use a 4 stroke engine. They all work using the same principals as most modern 4 stroke automotive engine.

Intake - Compression - Power - Exhaust

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