Yes, "four cycle" and "four stroke" are the same. The two terms may be used to describe an engine. As a rule, the term "four stroke" is more commonly used.
Yes
Yes
2 stroke and 2 cycle mean the same thing
No. In this case, stroke and cycle means the same thing. So 2-stroke/2-cycle engines should have 2-stroke/2-cycle oil and 4-stroke/4-cycle engines should have 4-stroke/4-cycle oil.
There is no difference, they mean the same thing.
Yes they just have different makes and synthetic and standard.
Yes. A 2 cycle engine is also called a 2 stroke engine.
Yes it is.
Yes
any gas station. its called gasoline There is such a thing as a 2-stroke or a 4-stroke engine, but the fuel is the same (gasoline). The difference being that the 4-stroke engine uses regular gasoline straight from the pump while on the 2-stroke engine you have to mix 2-cycle oil with the gasoline.
Neither a four stroke nor a two stroke have a bigger piston. It all depends on the size of the engine and how it is built. A 250 four stroke will have the same sized piston that a 250 two stroke would if the bore size is the same. Cc is calculated by bore x stroke (how far up and down the piston moves) so if a 250 four stroke has a stroke of 3.00 inches and a 250 2 stroke has a stroke of 3.00 the piston will be the same size. The only difference between a 2 stroke and four stroke is how the engine works. A 2 stroke has reed valves and it makes power every time the piston goes up but a four stroke it makes power every 4 times the piston goes up.
A standard four stroke cycle engine has intake, compression, power, exhaust strokes. Induction and intake are the same thing. Answer The induction stroke is where the engine cylinder refills with a new 'charge' of air (if it's a diesel) and air and fuel (if it's a petrol) There are slight variants on the above depending on whether the the fuel is directly or in-directly injected in to the engine - but to keep it simple the above hopefully will give you a good idea!
a yz250 is two stroke and a yz250f is four stroke. same with the 125 and 85