The 4 stroke or 4 cycle engine was invented in 1876 Nicholas Otto in Germany. This is the earliest 4 stroke and is commonly called the Otto cycle engine. The Diesel 4 stoke was invented in 1893 by Rudolph Diesel in Germany.
It is possible but has not been invented and would most likely be inefficent.
The Honda Dylan is powered by a four stroke engine.
that engine code is not a four stroke, its 2 stroke 80cc
It depends on which valves you are referring to. On a four stoke engine there are at least two per cylinder.
1-3-4-2 four stoke
Nikolaus Otto invented the four-stroke internal combustion engine
two stroke
3.48"
If it is a two stoke engine, and there are no specific prohibitions yes. Two stoke oils are broadly similar.
the gas is mixed
He founded the Daimler-Motoren-Gesellschaft (DMG), improved the Otto four-stroke engine, invented the grandfather clock engine, Phoenix engine, Maybach engine (with Wilhelm Maybach), and of course, the first motorcycle.