Join Date: Apr 2002
Location: Dandridge (Near Knoxville), TN, USA
A couple of answers were close, but slightly off. When it is colder, the denser air causes an increased mass of air to be inducted into the cylinders. The mixture will not be leaner or richer though, because the Motronic controls the mixture based on the readings from the O2 sensor. More power will be produced because of the larger total mass of the mixture though.
The reason we get such great fuel mileage at high altitude is because of the reduced mass of air inducted, and the lower quantity of fuel injected to keep the mixture correct. Of course there is also less power.
I don't want to achieve immortality through my work...I want to achieve it through not dying.
EX: '01 Black LT, BAT BYKE (Totaled at 110,000 miles)
IBA SS, BB, BBG, 10/10ths.
No bike now, but maybe in the future.