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2013 crf230f running lean on bottom
Posted: Sat Mar 23, 2013 8:56 pm
by js0102
I have a 2013 crf230f with a major bottom lean issue which shows whenever I wick the throttle. I removed the air box snorkel and removed the end of the exhaust core.and threw 13 47 gearing. I am currently running a 135 main and a 48 pilot and 3 turns on the mixture screw and the crfsonly needle clip in 5th position from top. It seems a hair rich in top but very bottom is super lean and poppy. The only time it seems happy on the bottom is with a 50 pilot.dies.this seem correct or is this horribly wrong?
Posted: Sat Mar 23, 2013 10:20 pm
by crfsonly
we highly recommend our PowerUp kit. this comes with a new POwerUp needle and main and pilot jets needed for correct and improved jetting. our fuel screw makes adjusting the fuel screw easy without tools.
ken
Posted: Sat Mar 23, 2013 10:28 pm
by js0102
I am running the power up kit, and also 500-1500 altitude and current temperature between 25 and 50 for current winter riding days.
Posted: Sat Mar 23, 2013 10:32 pm
by crfsonly
i see that now...missed the "crfsonly needle". the needle should be in the middle clip position. change this and report back.
Posted: Sun Mar 24, 2013 4:10 pm
by js0102
Put the 50 pilot back and did about 25 miles of single track and it was horrible it sputters all over bottom around 1/8 throttle. But on spark plug check it was horribly rich.
Posted: Sun Mar 24, 2013 5:29 pm
by crfsonly
as mentioned the correct clip position is the middle clip position. adjust the clip position as mentioned and report back.
Posted: Sun Mar 24, 2013 8:50 pm
by js0102
i did still just as bad
Posted: Sun Mar 24, 2013 8:57 pm
by crfsonly
with the needle now in the middle clip position go back to the recommended 135 main and the 45 pilot.
Posted: Thu Mar 28, 2013 4:30 am
by js0102
With everything set the way you mentioned its much better thanks
Posted: Thu Mar 28, 2013 7:43 pm
by crfsonly
that's great news. ken