Quick fuel Q750 tune ?

Use a pencil eraser to block each idle bleed one at a time. It should go rich while doing this. If you get very little change that air bleed circuit is restricted. I run a dual plane and stagger jet. All 4 main jets are different sizes and idle mixture screws are set to best idle and off idle transition. Plug reading at cruise and WOT gets a tune dialed in, it's time consuming but worth the effort.