When you are mapping your bike does it matter if it is cold or hot outside?

I would think the density of the air might cause the computer's fuel/air ratio to change.

 

Doesn't really matter. Try to stay consistent with the IAT (intake air temp) temp though, as it will dial in a bit quicker.

 

Wow, I get a kick out of that response,, he say's;
No it doesn't matter what temp it is outside but it does matter what temp the air is coming into the engine.

Think about it flyboyron, Are you going to only run the bike when it's the same temp as the day you mapped it?
Sure it will matter if you do it on the coldest day of the year in your area and/or the hottest, just use a little common sense.
An ambient temp swing of say 40-50° won't matter as much as large elevation changes as long as the engine is at running temp.

 

Air temp is just one variation you'll have to deal with.

Humidity is another.

Fuel age is another

Fuel quality is another

Fuel oxygenate additives is another

Air filter condition is another

There's probably a dozen others too.

 

When tuning anything the variables affect the mapping. Temperature, humidity, atmospheric pressure, fuel pressure, etc. All you can do is try to stabilize it the best you can for the conditions you will run in the most.

FWIW the automotive tuning I used to do was under real conditions, dyno time was only remotely good for WOT runs, drag racing, or bragging rights.

 

I did get to go for a ride and map the bike, the temps around 70 and not a bad riding day. I rode on some back roads, some twistys, and some freeway to get all around range of riding like I do.

Thanks for the help.