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  #1  
Old 04-02-2007, 09:24 PM
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Default 2003 YZ125 mix ratio.

Ok, I am the proud new owner of a 2003 yz125. I have never owned anything 2stroke except for a chainsaw. What exactly should my oil to gas ratio be? Not just a number like 32:1, but 32 ounces per gallon or something like that is the kind of explanation I need. Thats how little I know. Please set my pour self straight guys!( And do it in a way that I can understand )
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Old 04-02-2007, 09:36 PM
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Default Re: 2003 YZ125 mix ratio.

Any chance you can get hold of the previous owner and find out what ratio they were running?

As for figuring out how many ounces per gallon, I'm not sure.. I do it the lazy way and use one of these...
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Old 04-02-2007, 09:37 PM
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Default Re: 2003 YZ125 mix ratio.

Quote:
Originally Posted by woodsman View Post
Ok, I am the proud new owner of a 2003 yz125. I have never owned anything 2stroke except for a chainsaw. What exactly should my oil to gas ratio be? Not just a number like 32:1, but 32 ounces per gallon or something like that is the kind of explanation I need. Thats how little I know. Please set my pour self straight guys!( And do it in a way that I can understand )
3.2 ozs of oil into 1 gallon of gas gives you 40:1

4 ozs of oil into 1 gallon of gas gives you 32:1

16 ozs of oil into 5 gallons of gas give2 you a 40:1 ratio.

16 ozs of oil into 4 gallons of gas gives you a 32:1 ratio.

40:1 means 40 parts gas to 1 part oil

32:1 means 32 parts gas to 1 part oil
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Old 04-02-2007, 10:57 PM
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Usflag Re: 2003 YZ125 mix ratio.

The old owner said he was running 32:1 ratio.
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Old 04-02-2007, 11:26 PM
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Default Re: 2003 YZ125 mix ratio.

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Originally Posted by woodsman View Post
The old owner said he was running 32:1 ratio.
4 ozs of oil to one gallon of gas = 32:1

16 ozs of oil to 4 gallons of gas = 32:1
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Old 04-29-2008, 01:34 PM
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Default Re: 2003 YZ125 mix ratio.

I run 50-1 ratio in my yz 125. is that bad?
I jest run it because thats what the oil says.
Is 50-1 leaner or richer than say 32-1?
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Old 04-29-2008, 02:54 PM
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Default Re: 2003 YZ125 mix ratio.

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Originally Posted by yz125#22 View Post
I run 50-1 ratio in my yz 125. is that bad?
I jest run it because thats what the oil says.
Is 50-1 leaner or richer than say 32-1?
50:1 is richer than 32:1...... richer = longer engine life. I always ran 40:1
I would run 50:1 when it was cold out, but that's really the only time I ever ran 50:1. Colder air = denser air =lean
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Old 04-29-2008, 05:03 PM
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Default Re: 2003 YZ125 mix ratio.

Quote:
Originally Posted by yz125#22 View Post
I run 50-1 ratio in my yz 125. is that bad?
I jest run it because thats what the oil says.
Is 50-1 leaner or richer than say 32-1?
50:1 is richer in fuel content but lower in lubicity.
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Old 04-29-2008, 05:06 PM
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Default Re: 2003 YZ125 mix ratio.

Quote:
Originally Posted by woodsman View Post
Ok, I am the proud new owner of a 2003 yz125. I have never owned anything 2stroke except for a chainsaw. What exactly should my oil to gas ratio be? Not just a number like 32:1, but 32 ounces per gallon or something like that is the kind of explanation I need. Thats how little I know. Please set my pour self straight guys!( And do it in a way that I can understand )

There are 128 fluid ounces in a gallon of fluid. Divide the ounce of fuel by the ratio you are trying to obtain. 128/32=4 , 128/40=3.2 got it?
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Old 05-11-2008, 03:20 PM
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Default Re: 2003 YZ125 mix ratio.

i thought the more oil you put in like 32:1 will make your engine last longer considering more lubrication...? am i wrong
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Old 05-12-2008, 04:35 PM
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Default Re: 2003 YZ125 mix ratio.

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Originally Posted by yz85kid245 View Post
i thought the more oil you put in like 32:1 will make your engine last longer considering more lubrication...? am i wrong
Their are some people that think that 32:1 is a bit excessive and that the new lubricants work so much better than the older caster based, so they run a higher ratio. (Notice I didnt say leaner) But the manufacture recomend 32:1. It is all about your comfort level.
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