ok. I can't figure out why I cant get my carburetor tuned.

What the problem is is at 3/4 throttle, it is too rich. I have the needle at the leanest setting. it is the leanest needle Dellorto makes for this carburetor. The only other option is to lean the atomizer. But I did the math. The change in atomizer would be about 1/4 of the change 1 step of a needle change would give me in the area lost- between the needle and atomizer. There is no way this is going to be enough. I need about 4 or so needle change to make it run right.

The bike just has no consistency in the throttle change. from idle to 1/2 throttle, it has great pull, good power. But then I get to 3/4 throttle and it just bogs down. I had it richer before and it was even worse. I went up basically a total of 5 clip positions up on the needle (by swapping to 1. a leaner needle and 2. moving the clip position

This is the best I can think of to do to get it right now (besides the 1/2 step clip up position from the atomizer change) that I can get.

https://files.catbox.moe/bfr0du.mp4

Here was the same with 5 steps basically richer clip positions on the needle before.

https://files.catbox.moe/ldhbxp.mp4

Way worse as you can see.

Can anybody think of something I'm forgetting here that would make it do this, and be practically untunable?

Details: Honda Elite 2001 SA50, Dellorto PHBG carburetor. Some aftermarket exhaust, kind of small but free flow non-restrictive deal. Cone type air filter. Malossi reed/reed cage.

Pretty sure there are no airleaks. And the main jet is probably 1 or 2 sizes too small right now too since I just upgraded the cylinder kit. BEfore with the stock or a not as race-ey bbk I had the same problem.

And it seems before with this same kit previously or other bigborekit's I always have had the same problem.

Its been over 10 years but when I first got this I remember first getting it and flooring it first thing and it wheelied with me.