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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Posted on Jan 02, 2017

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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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Are you sure this is a DT 125 as with this particular bike it is self mixing there should be a separate tank by the handle bars just under the front plastics opposite the water tank this is where you fill it with oil then just put gas in the gas tank and it will mix it self you do not have to do anything else do not put oil in the gas tank with the gas mixing would usally be dirt bikes or really old bikes only

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1 Answer

Suzuki 750 Katana Hoses?


Hi, Alexander always check your service manual for proper routing, PVC type valves, and vent lines allow the following components to breathe freely:
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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

Won at my kids kempo class gio ya49 model what do i need to do to start it not sure if straight gas or mix also do i add oil anywhere thanx


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.
Try to find the name of the bike/quad somewhere.

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1 Answer

By changing gears while driving I've got black got smoke coming from my exchaust: what can I do to prevent it. What Oil is best for my TDI. Can I use fuel injector oil with the diesel, and can this be...


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I have a 1984 suzuki rm 125 it has always ran good for me. until recently it just putts and runs for maybe 20 secounds and then stalls. i tried to run start it and it kinda fired up but there was way more...


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

What kind of oil does my 2003 rm 125 need


For the gas tank= 2-stroke motor oil mixed at 32:1 *stock mixing ratio* [that's 32-parts gas to 1-part oil]. **[I personally use a 40:1 mixture for trail riding,..and 50:1 mixture for racing at the local MX track].

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1 Answer

2002 jr 80 will idle but will not rev up


carbs really need to be inspected-a manual is a must-or a similar *** make-if oil n gas mix is rite ratio then ur ok-look at the electrical for any cuts,corrosion or looseness-no wheelies

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