#1
 
 
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 ) 
#2
 
 
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... 
#3
 
 
Re: 2003 YZ125 mix ratio. Quote:
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 
#4
 
 
Re: 2003 YZ125 mix ratio. The old owner said he was running 32:1 ratio. 
#5
 
 
Re: 2003 YZ125 mix ratio. 4 ozs of oil to one gallon of gas = 32:1 16 ozs of oil to 4 gallons of gas = 32:1 
#6
 
 
Re: 2003 YZ125 mix ratio. I run 501 ratio in my yz 125. is that bad? I jest run it because thats what the oil says. Is 501 leaner or richer than say 321? 
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#7
 
 
Re: 2003 YZ125 mix ratio. Quote:
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 
#8
 
 
Re: 2003 YZ125 mix ratio. 50:1 is richer in fuel content but lower in lubicity. 
#9
 
 
Re: 2003 YZ125 mix ratio. Quote:
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? 
#10
 
 
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 
#11
 
 
Re: 2003 YZ125 mix ratio. 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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