A long read through the carburetor section recently,revealed some interesting facts,courtesy of the Professor.
The fact that air is thicker at low altitude,and thinner at high altitude is a given fact. Demonstrated by Fighter pilots at extreme altitude, and their piped oxygen to maintain consciousness.
This then means that with thicker or more air, at"low altitude" requires more fuel to keep the ratio's balanced.
Then with thinner air or less air at "High Altitude" we require less fuel, to achieve the balance ratio.
That all being understood, my question is.
Thick air should increase vacuum, and thin air alternately should decrease vacuum. If carbs are set well, at either end of the scale, does the vacuum, automatically change the mixture to satisfactory percentage.
I've found my bikes always seem to go better at night, is this because cool dense air makes more vac and draws more fuel,or is it because thicker air provides more air to burn a rich fuel mix better?
Who walks into the Lions Den, and comes out alive?
12 inch apes
1986 A3 series 750
Slash cut stainless mufflers
170 rear tyre
Custom cyane blue paint, wheels included
Relocated regulator rectifier
Stainless washable oil filter
Six pack rack
LED indicators and flasher unit.
Oil pressure hot at 1000 rpm 20 psi, 4000 rpm 60 psi
Shows 67000 kms
Jets 38 idle Mains 120 changed to 40 idle 135 main.