Miles per Gallon and ambient temperature

Its been well below freezing here for weeks.
I have ridden 90 miles when the roads were dry.
Filled up Sunday with almost exactly 2 gallons for a whopping 45 mpg.

I usually get 38-40 mpg so my guess is that the increased air density is responsible for the increased mpgs? Comments?

I also assume that the engine runs leaner as a side result.
Any danger of holing a piston due to the increased lean condition?

 

I drive a '74 VW "Thing". I've also noticed lower fuel economy and minor loss of power as the mixture becomes leaner. I think there's quite a difference between 75F and 15F, 20F, and 25F degrees.

I've never ridden my bike in warmer weather so I can't compare directly with you. I figured the VW was a good comparison because it's a carb'd, aircooled engine of similar size. :wink:

I'm in MD with you dude. We should meet up when it gets warmer. I'd like to see your carb synching bottles and other good stuff you do.

 

We can do a carb clinic at my house when the weather breaks.
Def we can go ride some time.
There is a guy that I met in the MSF class that has a 1200cc BMW and he wants to ride when the weather warms up. His bike is in VA during the winter.