Trying to dial in my QFT 750

The Burton write up is very good. Great info.

I read thru this article last night! Damn good info

Sounds like you might want to try and go back to a baseline. Not sure if you have you changed jets/air bleeds? I'd put the original jets, air bleeds and P.V. back in. Then, verify everything - transfer slots, floats, linkage. Start with the mixture screws 1 1/2 turns out and adjust idle speed to where you want it.

Also, 33 squirter and blue pump cam might be too much for that gear and converter. Maybe go to a smaller nozzle like a 28-30? And maybe a different pump cam that does not dump all the fuel so fast. You can play with the holes on the pump cam too if needed.

What is your timing set at? (initial and total). Obviously, if it's not dialed in right you will be chasing your tail. Maybe try and verify initial with a vacuum gauge - advance until vacuum stops increasing then back it off 1 degree. Might have to adjust your total depending where you end up. Vacuum advance plugged of course.

I believe you are getting ahead of yourself with jets and air bleeds for idle and part throttle driving. Air bleeds are for fine tuning when you have it in the ball park, you need to make some more coarse adjustments first. Jets are for WOT for the most part which it sounds like you have not messed with too much.

Once you get it to idle where you want it, drive it around with a vacuum gauge which will help verify which power valve you need. It will be especially useful with part throttle driving. The A/F gauge will corroborate the vacuum gauge.

The carb is at baseline, the only thing I changed was the IAB's 4 sizes larger to help with the carbon fouling of the plugs. I looked at the tslots yesterday before I took it for a drive and I squared them up. The one thing I did notice is 1 slot was longer than the other, so I kind of averaged it for the two. This carb came with the orange pump cam, not the blue. Timing is 18 initial and 35 total, I have not checked it with a vacuum gauge, but that is a simple check to do.

I think Im going to take that Burton article to the garage with me and go thru it, step by step to try to get it close.

And one other thing.
In my own experience, trying to get it to 14 to 1 on the A/F gauge will cause it to be to lean to actually run good.
I run mine at about 12.5 or 13 to 1 for a smoother idle and mid range, and about 12.5 -13 to one WOT

Thanks for the info!

Flame away, but IMO your 750 is way too much carb. That's why you're having so much trouble. An out of the box Eddy 650 would be beautiful. Bolt it on and hold on.

I wouldda throwed that 750 as far as possible by now.

I know we have talked about it before, but sadly I just dont have the money to throw towards a new carb. Besides I like pulling my hair out LOL