i just had my blaster motor rebuilt, it got bored 50 over and i also put on a pro ciucit exhaust. i put in a *60 jet dont remeber if its 160 260 but what ever is the right one. ive ran about 2 or 3 tanks threw it premixed because i took the oil pump out because thats what cause the motor to sieze in the first place. and ive fouled the plug twice now. and it has oil on the plug. dose this sound like the jet is to big or did i mix it to rich???? thanks.
fouled plug
- Thread starter danbap
- Start date
you should mix it 31:1. Also, if your plug is wet then yes, you could be running too rich. Check it out and do a plug chop to make sure. Also, 2 strokes go through plugs all the time.
ok, so more oil = leaner running engine, less gas in the mixture. Dont argue just believe it. If its fouling plugs it is obviously running rich. So you net to adjust the needle clip, pilot jet screw and the main jet. Dont just adjust one of these, as it sounds like your whole throttle range is running rich. If you have any qyestions about what that means look it up. Its a long type up and im sure no one feels like doing it
Guy there isnt "less gas" in the mixture. If you mix one gallon of gas to one gallon of oil the you are running 1:1, That isnt running leaner or less gas. its the same amount of gas with MORE oil. The only way you can make it run leaner is in you ADD more air. That way, the engine is burning more air than gas. The Oil/gas mixture has nothing to do with how Rich/lean your bike is running.
Somebody please back me on this one b/c I dont want to argue it.
Somebody please back me on this one b/c I dont want to argue it.
he was asking if he mixed too much oil in the gas, which would make it run leaner. I was explaining to him why chainging your mixture with less oil will actually make it run richer, here lets back this up with some facts, here ya go Two Stroke Gas/Oil Ratios - - Dirtbike at Off-Road.com
It says in the fist 2 paragraphs on the article that what I am saying is right.
"Let’s see … your bike is running on the rich side, so you put less oil in the gas to lean it out. Wrong.
Or maybe your bike is running a bit too lean, so you figure that if you put more oil in the gas, that should take care of the problem. Wrong again."
then it goes on to say this:
"If you do foul plugs, it is more than likely caused by poor jetting, not a bit too much oil. If you get your bike jetted correctly, have a fresh plug and a strong ignition system, you won’t foul plugs"
I see where your "arguement" is here:
"A typical example: you go from a 50:1 ratio to a 20:1 ratio. Your engine will now run leaner, and you’ll have to make jetting changes. You’ll need bigger (in number) jets because the oil molecules are thicker and the flow rate (the amount coming through the jet) is less.
Aha! The volume of fuel has changed. The oil takes up some volume that the gas used to occupy, so your engine is getting less gas and needs to be richened up."
But that is not a good arguement for you b/c that change from 50:1 to 20:1 is such a huge change. I mean yes, if he went from running 50:1 to 20:1 then yes that change alone would mean he would have to re jet. But, since I am almost 100% sure that he did not make that huge of a change he issure is purely JETTING! Not the oil/gas mixture.
Also, as it says here :
"Shake the gas can vigorously before filling your gas tank. The oil must be suspended evenly in the mix, so the engine gets lubricated evenly. If the oil is not mixed thoroughly, the engine starves for lubrication, and the spark plug gets oil stuck on it."
This could be his problem with his plug being wet with oil as he said in the post.
Thanks for giving me a link to this article to show why I am right!
"Let’s see … your bike is running on the rich side, so you put less oil in the gas to lean it out. Wrong.
Or maybe your bike is running a bit too lean, so you figure that if you put more oil in the gas, that should take care of the problem. Wrong again."
then it goes on to say this:
"If you do foul plugs, it is more than likely caused by poor jetting, not a bit too much oil. If you get your bike jetted correctly, have a fresh plug and a strong ignition system, you won’t foul plugs"
I see where your "arguement" is here:
"A typical example: you go from a 50:1 ratio to a 20:1 ratio. Your engine will now run leaner, and you’ll have to make jetting changes. You’ll need bigger (in number) jets because the oil molecules are thicker and the flow rate (the amount coming through the jet) is less.
Aha! The volume of fuel has changed. The oil takes up some volume that the gas used to occupy, so your engine is getting less gas and needs to be richened up."
But that is not a good arguement for you b/c that change from 50:1 to 20:1 is such a huge change. I mean yes, if he went from running 50:1 to 20:1 then yes that change alone would mean he would have to re jet. But, since I am almost 100% sure that he did not make that huge of a change he issure is purely JETTING! Not the oil/gas mixture.
Also, as it says here :
"Shake the gas can vigorously before filling your gas tank. The oil must be suspended evenly in the mix, so the engine gets lubricated evenly. If the oil is not mixed thoroughly, the engine starves for lubrication, and the spark plug gets oil stuck on it."
This could be his problem with his plug being wet with oil as he said in the post.
Thanks for giving me a link to this article to show why I am right!
I just love it when people try to make arguements and then give me firing power to go against them.
jesus f*ck, are you retared?, i thought you had some common sense.
at the end of his post dan states this "does this sound like the jet is too big or did i mix it too rich"
Ok, so if he is running rich- unless he is mixing it like 15 to 1, which in that case he needs a damn manual- then putting less oil in the gas will make it run richer. and more oil i nthe gas will make it run leaner. I dont understand how you got confused.
at the end of his post dan states this "does this sound like the jet is too big or did i mix it too rich"
Ok, so if he is running rich- unless he is mixing it like 15 to 1, which in that case he needs a damn manual- then putting less oil in the gas will make it run richer. and more oil i nthe gas will make it run leaner. I dont understand how you got confused.
So, in your expert opinion to fix the fac that he is running rich is to mix less oil in his gas? WRONG! That is not how you fix issues like that you adjust your jetting. Common now, thats what the article says! He may have well mixed it 15:1 but in the end he purely has a jetting issue and nothing more. Nothing that has to do with an oil/fuel mixture.
Now you are contridicting your self.^^^^ I was telling him that it has nothing to do with his jetting....then you told him to adjust his jetting and clip. So, if it has nothing to do with the jetting then why would you tell him to change it?? Just wondering
I have to call BS on this statement... Why would you make several adjustments at once?? Thats ridiculous..
Making one adjustment at a time is the only way to go so you can actually see what changes each adjustment makes. If you make several adjustments at any time how will you know what adjustment does what??
Bottom line is... Make only 1 change at a time.
ok well thank you all. im going to adjust the air fuel screw because i read in another post jetting 101 and when it is could it runs like sh*t like it wont go then when it warms up it seems to run fine. i mixed it 32:1. so the plug being wet with what seems to be oil. would mean the 260 jet for a 50 over and piped motor is to big???? if it is ok but i just didn;t think so but you guys are the ones that know. ill get a new plug adjust the air fuel screw and check the plug. is the plug sappose to look like one out of of a 4 stroke?
Stay at 32:1 mixture, and lean out your jets one circuit at a time untill your plugs get browner.
And a new air filter wouldn't hurt either.
Ok, so if he only does a plug chop that only tells you if the 3/4 to wide open throttle is running rich or lean. Ok so you make that adjustment. And then Most people leave it at that, =Fail. But when someone ask them if they have thier bike jetted right they say yea it is, even though it isnt. So you just adjust one of the jetting circuits? That question answers itself.
Make 1 adjustment... Evaluate the results... Make another adjustment... evaluate the results.... Until you have it pinned down
That way you know what is happening with each change...
That way you know what is happening with each change...
