Slightly lean at midrange

[RACxEMxWILLIE]

Just swapped the single keihin for twin mikunis.

 

300 main

25 pilot

needle in middle

a/s is 1.25 turns out

 

Did a 3rd gear WOT plug test and its a little lean. Should i change the pilot or move the needle up a slot?

[So Cal Banshee]

first off, your post is confusing... lean at midrange.. but you did a WOT test?? Second need more info about your setup.. elevation, brand of pipes, porting, pods or airbox.. if lean @ WOT then bigger mains, if lean at midrange try raising needle/changing to different needle first, if that doesn't clear it up, look at the pilot (seems a little small..maybe 27.5/30

[gotta_goatsfast]

Yea.... how can you confirm that your carburetors are lean at part throttle when the test you used to determine this diagnosis was done at full throttle? Anyway, you've figured out your problem (its running lean) so go fatten it up a bit.

[RACxEMxWILLIE]

first off, your post is confusing... lean at midrange.. but you did a WOT test?? Second need more info about your setup.. elevation, brand of pipes, porting, pods or airbox.. if lean @ WOT then bigger mains, if lean at midrange try raising needle/changing to different needle first, if that doesn't clear it up, look at the pilot (seems a little small..maybe 27.5/30

 

 

Fatty's and k&n air filter. Thats it. I live in georgia, so 1000 feet and I did a test in 3rd gear (half to 3/4 throttle). If i put WOT, i didnt mean to.

[fastbanshee8]

Get some 27.5 pilots put in those carbs, before trying anything else, then adjust your air mixture screws.

[Paulie B]

Get some 27.5 pilots put in those carbs, before trying anything else, then adjust your air mixture screws.

^^^This fixt my midrange problem + adding dyna needles.

Try a 310-320 main jet also