Question about 2004 Suzuki RM 125

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Suzuki problem no i mix the gas on a 2 galons tank. and i'm doing 1:22 but the problem is when i start the bike comes dark oil on the exchaust and i took the front cover on the top of the exchaust and there is full with the same dark oil. to me it looks like engine oil and i'm not sure if that oil in there is normal. but i still can understand how the oil goes there. you think it can be the piston ring losing compretion?

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Your crank seal has gone engine oil will will find its way through sa it gets worse you will have problems even starting the bike and if it does start it will run badly replace seal and replace rings gaskets and decoke exhaust and piston top and port this will in effect solve the problem

Posted on Jan 20, 2009

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I have a 1993 Honda 125cc was told to mix gas but these oil in crankcase do I need to mix?


You would never mix any fuel and oil for the crankcase. If it is a 2-stroke engine, the fuel and 2-stroke oil will need to be mixed before entering the cylinder. Some engines have an automatic mixing setup - those have a separate oil reservoir for 2-stroke oil, but it will usually be a plastic tank, located nowhere near the crankcase. On a "4matic" engine, it fires like a 4 stroke, but there is no crank case, and the fuel needs to be mixed like a 2 stroke. What is the vehicle you are referencing? A dirt bike or street bike? It seems the CR125 and NR125 are both 2 stroke engines, so somehow the fuel needs to be mixed with 2-stroke oil. Can you take a picture of the crankcase oil cap?

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1 Answer

How do I fill up my dirt bike motorcycle with the quick 2 mix oil/gas mixer


Find out how many gallons your motorcycle tank holds. Do a little research on the manufacturer and model of your dirt bike. Also find out what ratio between oil and gas is required. Then, do a little math, and find out how much oil to add to each tank. Add the oil. Then add the gas. Adding the gas last will help stir up the oil in the tank.

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1 Answer

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You are going to need more information before you start this up.
You need to know whether it is 2-stroke or 4-stroke.
You need to know the manufacturer, I see some use 25 parts gasoline to 1 part 2-stroke oil. Other machines use a different proportion.
If it is this manufacturer, mix say 25 ounces of gas with 1 ounce of 2-stroke oil in a separate container and pour into gas tank.
If it is 4-stroke, you will need oil in the crankcase, not in the fuel tank.
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Are you mixing regular motor oil in the fuel? Doesn't this bike have a reservoir for 2-stroke oil? You must use 2-stroke oil in that reservoir. Buy it online if you can't find it locally.

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1 Answer

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1 Answer

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