Air Temp. & RPM's

[Glyde]

I have gotten used to running around town by the sound of my bike. It seems the last couple evenings the RPM's are lower at my normal city speeds. The air temps are lower(mid 50's) with much less humidity this time of year around here.

My question, will the temperature and humidity effect the engine RPM's ?

And if so, is there a simple answer for it?

BTW, 2000 Dyna(saur), Mikuni 42mm carb.

[Crocodile56]

Air pressure, temp and humidty will affect the way fuel/air is burned! As far ar RPM's not sure, I know in cold weather with high pressure frt in place, all engines run better and burn fuel better!

[gtoracer]

Were you wearing ear muffs because of the cold?

[WAMMER]

It is about 44F here this morning & on the ride in my RPM's were a little higher, about 200RPM (that usually happens). Mine is an fuel injected Evo.
I LOVE ridin' in the cooler weather.

[Juiced]

I love the cooler weather.....Lots of HP!!!!!!


Me loves the speeeeeeeed.

[Glyde]

Air pressure, temp and humidty will affect the way fuel/air is burned! As far ar RPM's not sure, I know in cold weather with high pressure frt in place, all engines run better and burn fuel better!

I kinda figured humidity effects the way she runs. We both seem to like this cool dry air.
was just kinda thinking out loud as to the why for's. It's not a problem, just curious.

Were you wearing ear muffs because of the cold?

No ear muffs but a canadian hat under the beanie. Kinda a beanie under a beanie. Tuque

[gtoracer]

Any engine normally aspirated, will run leaner in cooler weather because the air is denser. That may be what you are experiencing. Fuel injected bikes should compensate especially the one's with oxygen sensors.....either that or you have your beanies pulled down over your ears......Glenn

[Boss]

There are a lot of different variables and in addition to what was mentioned above, altitude also plays a roll.

[wavman8]

There are a lot of different variables and in addition to what was mentioned above, altitude also plays a roll.

so does that mean if you are higher than a kite your bike will run better?? hmmmm.. i feel an experiment coming on?

the above statment is pure fiction and I do not condone or recommend the use of any.....O nevermind!!

[Boss]

Considering most of my riding has been in flat zones (with the exception of the Appalachian Mountains) this PreHERD run in colder climate will be a test by trial when we get up in the Ozarks!

[gtoracer]

so does that mean if you are higher than a kite your bike will run better?? hmmmm.. i feel an experiment coming on?

the above statment is pure fiction and I do not condone or recommend the use of any.....O nevermind!!

No the higher in altitude the bike is the thiner the air and the richer the bike. The higher the rider the less he cares and the poorer the rider....erbox

[wavman8]

ahhhh, thanks for the clarification.:moo

[Glyde]

Any engine normally aspirated, will run leaner in cooler weather because the air is denser. That may be what you are experiencing. Fuel injected bikes should compensate especially the one's with oxygen sensors.....either that or you have your beanies pulled down over your ears......Glenn

Did a little reading on the 'net. Kinda getting the just of it. It's not like the bike turns into a monster, but this time of year the extra pep is noticeable......................Thanks fer the input.

so does that mean if you are higher than a kite your bike will run better?? hmmmm.. i feel an experiment coming on?

the above statment is pure fiction and I do not condone or recommend the use of any.....O nevermind!!

No the higher in altitude the bike is the thiner the air and the richer the bike. The higher the rider the less he cares and the poorer the rider....erbox

Been stayin' away from the stuff you may be referr(ing) to .....................but that's another story. :gee

[gruss]

so does that mean if you are higher than a kite your bike will run better?? hmmmm.. i feel an experiment coming on?

the above statment is pure fiction and I do not condone or recommend the use of any.....O nevermind!!

..........:laughout

I know that when I take lortab, my bike runs much slower, and those stop lights take about an hour.....:dan