All 2st Mikuni needle ?

Can someone tell me the difference in these two needles. 6AEJ1-64 6AEJ3-64. My wxc seems a little rich off the bottom and midrange. I have the first number installed with the clip in #2 slot from the top. The second # is the stock needle. Running a 430 main, 35 pilot and 4.0 slide with an fmf and no airbox lid. elevation at 1950ft. Runs good on top end.

have you tried adjusting your airscrew?

have not

thats where i would start, along with the pilot for bottom end. hard to tell without riding the bike..but the needle will have next to nothing to do with bottom end usually. thats mostly a mid range adjustment. where the circuits overlap it get dicey

1st off the 6AE J1 - 64 is the stock part a J4 is from others
what is your altitude and temp.
assuming the 96 250WXC

I have a J1 in it, altitude is about 1950 and 70 degree temps

ya that was Saturday, 38 today

get a lectron and the temperature differences does not make your bike respond different

Robert-Jan

can I borrow some $$$$ lol Trying to get the rest of the bike sorted out then I might consider a Lectron. My brother had one on a 80 model 390 auto and loved it.

when i started building my 360, i wanted to give the mikuni a chance as my older mikuni vm carbs were easy to tune, altho they did change a bit with temp, nothing drastic. it soon became apparent that it was a rob-peter-to-pay-paul situation. i did get the tmx very close. started and ran good. had a bit of a bobble around the powervalve transition i couldnt shake. i know it could probably be jetted out i just decided to try a lectron and wow they are fun to tune. i will say i believe they increase top end as well. the list of benefits is quite long and one or two will likely end up on my older hoosks as well.