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suction stroke and exhaust strokes are the two strokes involved in 2 stroke engine....
The exhaust plays a great part on a 2 stroke than a 4 stroke. The exhaust system is the only thing that is scavenging the cylinder of the burn gases on a 2 stroke, verses the piston pushing most of the exhaust out on a 4 stroke.
intake and exhaust
Oil in the exhaust is part of the two stroke design but if you have too much, you should check the fuel/oil mixture or the oil injector settings.
Yes it is a two stroke But if u want to check the exhaust pipe is thin then it's a four stroke If it is thicker it's a two stroke
Pollution - 4 stroke has far less unburnt hydrocarbon in the exhaust.
Two strokePistonConnecting RodCrankshaftFour strokePistonConnecting RodCrankshaftCamshaftCam follower (inlet and exhaust)Rocker (inlet and exhaust)Valve (inlet and exhaust)Cam drive (belt or gear)Typically a two-stroke is air cooled, while a four-stroke is water cooled, so the water cooling adds these additional items:Water pumpFanFan / pump drive (typically belt)
That is the burnt two stroke oil. it is pretty normal
Two strokes have two cycles the piston go through intake/compression and ignition/exhaust where four strokes have four separate piston cycles intake compression ignition and exhaust.
The Suzuki RM125 is indeed a two stroke. This can be observed by the bulge in the exhaust pipe. This feature is only present on 2-stroke engines.
Intake valve and exhaust valve.
A four stroke engine requires the piston to travel up and down a total of 4 times to complete one full combustion process. The 4 strokes are: intake, compression, power (ignition), exhaust. And the intake and exhaust valves are timed accordingly. A two stroke engine fires ever other stroke and uses ports for intake and exhaust (no valve train)