84 250R running rich haven't pulled carb yet to see what jets are in it but what else to look for it smells rich out if exhaust. I bought a carb rebuild kit for it
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Arm chair racerNew to the board
84 250R running rich haven't pulled carb yet to see what jets are in it but what else to look for it smells rich out if exhaust. I bought a carb rebuild kit for it
Power User
Got the holeshot
Have you checked your plug? White is lean, dark is rich, brown is good.
"Roll on 3"
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"Long Live the ATC"Building: ATCr125xRiding: ATC200sx"I am not a mechanic, mechanics get paid for this. I do it because I enjoy it."
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Arm chair racerThe day begins with 3WW
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I would start by doing the following:
If the gas is old or yellow at all, change it . . Yellow gas is either oil or contaminated by rust in the tank or both.
Check the float level . . If it is excessively high, it can cause a rich or flooding condition.
..................Here's an example of it a little too high . . It should be just below the solid black line in your case . . If it is at the dotted line, it will still not cause a problem even though it is just a little high . . If if is above the dotted line, I would definitely fix it by bending the small metal tab slightly that depresses the needle, slightly upward toward the top of the carb.
If the float is plastic, it requires heat to bend it, and this should only be done by someone whom is very experienced, otherwise you might end up with a puddle of melted plastic which will no longer fit very well.
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............................................. Here's another in which you can see the is level way too low.
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If it stutters/burbles even the tiniest bit when you accelerate, it is rich somewhere . . If it simply hesitates as if it is out of gas, it is lean.
Post a photo of the plug . . The plug on the right is shiny which means it is wet which means its oily . . It is possibly rich too but its hard to tell because of black deposits from the oil . . This engine should be repaired . . The middle plug is perfect . . The left plug is lean.
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This plug is bone dry so the black means it is rice . . If both the threads and the porcelain is black, i would start by reducing the main jet size first . . In the case of a plug that has extremely heavy deposits like this, I would go down 3 sizes on the main because just one will not be nearly enough and two will likely no be enough . . Four would be too much.
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Arm chair racerNew to the board
I really appreciate your comments and I will work on it this weekend my plug looks like the middle one just a little browner defiantly not like the others. I smells rich to me and kind of not winding out good until you get to third gear.
Got The Holeshot
Arm chair racerJust too addicted
It's nice to see you wear a helmet in your videos
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Arm chair racerThe day begins with 3WW
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ok, the fact that you disappeared after you took off doesn't give us much to go on, however, it definitely missed at least 3 times as soon as you made your second shift . . read my previous post . . if it stutters/burbles when accelerating, it is likely rich . . it definitely stuttered, therefore it is likely rich . . if the gas level is ok, try 2 sizes down on the main jet and do the same test . . if the miss is gone, your main jet is perfect . . if the miss is still there, i think it might be another problem.Originally Posted by hdd
install a new plug so you can look at the color.
your spark plug color suggests your jetting is really close.
what oil are you using?
what ratio is it?
what is your elevation?
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Arm chair racerThe day begins with 3WW
i just listened to it again and it didn't miss in first . . it missed a tiny bit in second and even more in third which definitely sounds like too big of a main jet to me.
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Arm chair racerNew to the board
Thank you will look at it this weekend and get back to you thank you for your help
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Arm chair racerThe day begins with 3WW
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xlnt . . keep us posted
PS - nice back yard and garage.
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Arm chair racerNew to the board
Elevation 650
20:1 ratio
Will have to check oil type when I get home
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Arm chair racerNew to the board
still running rich
ok changed plug, rebuilt carb,, checked float level. still mainly on low end sputters but once it warms up good and run for a little while, it runs through all gears strong and no sputtering. the plug looks dark tan and one thing I noticed is that the idle screw has to be turned in just about all the way for it to maintain idle on the carb slide. I bought a couple of smaller main jets to try when they come in but I am just lost on why it is not running correct with the stock ones. looking at changing reeds also
yaegerb
The day begins with 3WW
Try 32 or 36:1 oil ratio. 20:1 is too much oil in my opinion. Do his before you change jets and see if that helps.
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Arm chair racerNew to the board
the manual says 20:1 running less oil like you suggested will not hurt motor?
yaegerb
The day begins with 3WW
Not running 20:1 will not hurt the motor. The only time you would need an oil ratio that high is if you were running your bike, pinned in 5th for hours. Try 36:1, it will actually richen your fuel mixture.
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Arm chair racerNew to the board
ok tired everything suggested seems to be better but sputters through 1st and 2nd then seems to clear up and run. once I ride for about 5 minutes it runs good through all gears. it seems like once warmed up good it runs fine. but it still smells rich to me out of exhaust after I ride it hard then let it idle. I have bought 2 smaller main jets but does it seem like I might need to change the slow jet the main is a 150 and the slow is a 50.
thanks for all your help
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