Thanks for the info from all of you!! Glider, your explanation helped clear up issues in all kinds of areas for me. I now understand the 2 stroke oil thing now. I now know what kind of motor a lawn mower has when it uses oil/gas mixture.....lol....I dont think I saw the answer or I must of over looked it. So my bike is a V-Twin? Also, its not recommended to use Mobil 1 V-Twin 4 Stroke motor oil in the Primary even with it saying you can use it? I did understand I can use the oil in the motor but I think "FIN" said its best not to use it in the Primary. I may be asking crazy questions or just being to paranoid over this subject but I dont want to mess my bike up! Thanks a million fellas!!!
Just a simple explanation between engines.
There are 4 stroke engines which have many configurations like flat 4 cylinders as used in subaru and VW's of yesteryear which are mostly opposed 4 cylinder engines because the cylinders are 180* opposite each other.
Then the "V" twin engines and let's not forget the straight 2-3 and 4 cylinder straight engines in the import bikes. Most but not all of them use a straight gas but a few use an oil/gas mixture.
Then comes oil injection. These are mostly two stroke engines and the reason for the injection is to not have to mix the oil and gas. It makes it a bit neater to use and operate,
Four stroke engines as the name implies have 4 strokes to complete one cycle of the engine, They would be an intake stroke which pulls the fuel into the cylinder on it's downward stroke with the intake valve open, then comes a compression stroke with both valves closed at this time. This is where the the fuel charge is compressed on it's way to get ignited by the spark plug.
After that the piston gets forced downwards from the ignition/combustion stroke to the bottom and this is where you get the power from.
After that the exhaust valve starts to open and the spent charge is forced out the exhaust. This type of engine similar to the HD engines takes two revolutions to complete one power stroke.
In a two stroke engine, the cylinder had two ports in the cylinder wall. One for intake and one for exhaust. As the piston moves downward, it draws in the fuel from the upper port and it gets ignited by the spark plug. As the piston nears the bottom of the cylinder, there is an exhaust port there that will take the burnt charge and send it out the pipe. It is then referred to a two cycle because that is how many cycles it takes for one complete "cycle'' of the engine through every stroke. It will generally have one complete revolution to accomplish a power stroke.
The four cycle takes naturally 4 cycles or two revolutions to do the same thing. That's where the 4 cycle name comes from.
Hope I didn't confuse you to much!
