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Mixing Ratio, Opinions


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I have always ran power plus @ 50:1 in all my bikes and never had a problem, a friend of mine who has built and ran his fair share of 2-strokes tells me I am crazy for running at that ratio. His thinking is that with more oil you get a better seal and make better compression, witch makes more power, witch makes sence. He's also saying that running more oil (32:1 at a min) and jetting up on your main, my bike will run better, make more power, and last twice as long. I have 6 friends with shees and we all run the PP @ 50:1 and the one guy telling me to change it up doesn't have a shee, but a strong backround with rz350's. Is what he telling me true and should I run more oil?

 

Thanx

Gene

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Depends on the brand of oil. An engine is an engine. The oil is the smart one here. I always say the oil is smart... not the engine. He may be right depending on the brand of oil. You need to see what the manufacturer recommends. I run at 32:1 though. You could try his theory and report back for all of us.

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well he wants me to change my oil too and re-jet my bike so he can explain how and why I should run my bike like this. PP recomends 50:1 for their oil and I figure most synthetic oils are good at 50:1. He wants me to drain my gas and run yamalube 2-r at 32:1. But he is swearing that my bike will make more power with more oil!?!?! That is the question I really wanted answered, I figured performance shops or actual engine builders would have some things to say on this subject.

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  • 2 weeks later...

I can understand his logic, more oil = less friction= more power. But I am not sure if the engine will understand it! I personaly think 50:1 is a little too lean, I run 32:1-40:1 but that's just my preference. I don't think more oil and richening the jetting will gain anything but maybe a longer lasting engine.

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When I toasted the crank in my 99 kx250 I rebuilt the entire motor and he helped me put it all back together. We used his logic in the jetting that we did and it lacked on bottom end but revved out clean. My bike already lacks on bottom end being a shee, this is why I haven't tryed it already. But any insight on the subject is great..thanx

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Well I just went from Castrol 28:1 over to Amsoil 40:1 and didn't notice any difference at all, BUT I am a strong believer in a richer mix of oil for this reason:

I had a jet ski that was raced. It had a big bore, head mods, and thats it....I had major problems w/ holding a set of rings longer than 4-8 hours...The jet ski went great and barely took my friends jet ski which was also set up for racing.......I finally figured out that the oil pump was turned down so I increased back to stock settings......Lets just say.....my friend wasn't too happy... :lol: I gained 5mph on top speed and took my friend about 5 jet ski lengths in 300' where as before I could only take him on top......So I not only gained performance, but also life and reliability....I went through 3 top ends to find out the oil was leaned out.....So if I was you, I'd listen to that ONE guy....just because all your friends own shees, it doesn't mean they know what they are talking about......BTW, I'm going back to Castrol 28:1

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