Do you have other needles to try?
Get one with a fatter end & longer taper... something like that
Here is the info... have fun goin down that rabbithole (or needle pit)
Just in case that wasn't enough to give you a headache...
So, where (which revs) do you want MORE FUEL?
If you are LEAN at WOT, then change to 2nd or 3rd clip... that will RAISE the needle, which will mean there is MORE FUEL earlier & at WOT (as needle is no longer restricting the flow).
My initial comments, without reading issue correctly....
X47 ? Probably too long.
Use a SMALLER MAIN jet & go to a 2.48 shaft.
Also, what colour FLOAT does it have;
White or Black? (Different weight, from memory black is heavier)
To you have Black or Clear bowl? (They're different heights.)
Is the seat a 200 or 250? Does it have a SPRING.?
Once you have rammed yourself so far down that needle hole that you can see a tiny circle of daylight....... then PRINT the following, grab a highlighter & a few coloured pens & read it, a few times, it will eventually start to make sense...
Then, when you have tried a dozen different needles, have every imaginable spare part & are STILL having problems.... check the timing, as most fuel problems are electrical!
And IF you are still bored & decide you want to modify crap even more, grab the needle you kinda liked, except for a certain part of the rev range where it was still too lean... put it in a drill... get some 800grit sandpaper, spin that needle & hand customise that needle to suit your specific needs, finish it off with 2000grit so it's nice n smooth, try that...l then realise it's an issue with the CDI / variable ignition / electrics / loose spark-plug lead etc.
Ohh, i just saw this... "Mikuni pump"
Well, by now you have read up & KNOW the answer... there are 2 main components you need to check........ read up & understand sections 3.2.1 & 3.2.2.
Last edited by SubEtherBASS on Thu, 26 May 2022 07:51:24 +0000; edited 3 times