[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?

[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

[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.

[crfsonly]

i see that now...missed the "crfsonly needle". the needle should be in the middle clip position. change this and report back.

[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.

[crfsonly]

as mentioned the correct clip position is the middle clip position. adjust the clip position as mentioned and report back.

[js0102]

i did still just as bad

[crfsonly]

with the needle now in the middle clip position go back to the recommended 135 main and the 45 pilot.

[js0102]

With everything set the way you mentioned its much better thanks

[crfsonly]

that's great news. ken