2015 250sx carburetor problems

Related:
Create New Tag

7/11/2017 8:02 PM

Having some issues with my 2 stroker fouling plugs I am riding at around 5000ft I'm running a 40 pilot jet a 158 main jet on the 3rdslot on the carb needle when I look at the plug it looks like a rust darker color.

|

7/11/2017 8:26 PM

What fuel/oil mix are you running?
Have you done a chop test?

Paw Paw

|

7/11/2017 11:00 PM

32:1 ratio

|

7/12/2017 5:09 AM

I have always said that the factory spec of 50:1 or 60:1 was not correct, but in the last year I see where it is really correct. I have read an article in the last month or so that was in Motocross Action mag and the did a lot of testing we can't do and found that for some reason the bike runs better and the carburation is much cleaner at those factory specs. They were not able to get the jetting correct at 40:1 or 32:1, but got it correct at the factory spec of 60:1.
You may want to review this and see if it helps.

Paw Paw

|

7/12/2017 6:57 AM

Agreed with above go up to 40:1 or 50:1 at least and just make sure you're using a good synthetic oil, 32:1 is too much oil.

|

7/12/2017 8:12 AM

Thanks

|