Just curious as to what the fuel to oil ratio is on a 99 Sport 400L? The winner get's a nickel[img]i/expressions/face-icon-small-wink.gif[/img]

 

32:1

 

Thanks, I new it was more than 16:1 just curious though. Right now I just rebuilt my top end and I'm running 40:1 in in the tank right now, plus the 32:1 from the pump, wow! Helps me understand why its smoking so bad! Looked at the oil tank last night and the pump is working, so...I'm going to drain the tank and put some 93 in her and see what she'll do!

 

32:1 is just a guess.If not i believe it is pretty close.

 

Well, probably a well educated guess[img]i/expressions/face-icon-small-smile.gif[/img]

 

Fuel/oil ratio varies on injected motors based on throttle position. Don't know the exact ratios, but I believe it starts at something over 100/1 and gets richer from there. An easy way to calculate an average is to fill the gas and oil tanks, ride a couple hundred miles, and see how much of each you've used. If you've used 10 gallons of gas and a quart of oil, you're right at 40/1.

 

100:1 at idle,...about 20:1 at full throttle. Most people building 2 stroke race engines get rid of the pump and run 40:1 premix.that way you have 40:1 all the time.

 

What are some advantages to mixing and getting rid of the oil injection?

 

Loosing a little weight with the oil tank and the injection pump.And knowing you are getting the right mix of oil and gas ,and not worrying if the pump is actually working or not.You just have to make sure you don't forget to mix.

 

LOL! I figured about the weight savings. I never think about if it stopped working... That would suck, now wouldn't it!