2015 250sx carburetor problems

kolby
Profile picture for user kolby
Posts
8
Joined
7/11/2017
Location
Farmington, UT US
kolby
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.
|
Paw Paw
Profile picture for user Paw Paw
Posts
679
Joined
12/24/2011
Location
Benton, LA US
Paw Paw 7/11/2017 8:26pm
7/11/2017 8:26pm
What fuel/oil mix are you running?
Have you done a chop test?

Paw Paw
kolby
Profile picture for user kolby
Posts
8
Joined
7/11/2017
Location
Farmington, UT US
kolby 7/11/2017 11:00pm
7/11/2017 11:00pm
32:1 ratio
Paw Paw
Profile picture for user Paw Paw
Posts
679
Joined
12/24/2011
Location
Benton, LA US
Paw Paw 7/12/2017 5:09am
7/12/2017 5:09am
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
seth505
Profile picture for user seth505
Posts
9369
Joined
4/1/2008
Location
SD, CA US
Fantasy
1092nd
seth505 7/12/2017 6:57am
7/12/2017 6:57am
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.

The Shop

See All »

Post a reply to: 2015 250sx carburetor problems