Anyone run a summer tune and a winter tune on their bikes?

[CoreyP]

The tune I have on my bike works noticeably better when the temps drop into the 50's or 60's.

My summer, which is like 6 months a year, 90 degrees with high humidity. I bought my Valkyrie around this time last year. At first it was a new to me bike so I didn't press my luck with the bike. Had to buy some tires and get use to the size etc. etc.

Worked out this way. As I got familiar with the bike with some maintenance and new tires it was getting colder and colder.  Bike was running well and seemed to run better the colder it got. Humidity also dropped. Not really a surprise to me. Most engines like colder temps.

Looks like I should have two tunes for this bike, one hot weather, one cold weather. Anyone doing that? I'm not sure if it's worth trying to do with 6 carbs? I think I may just end up with a mess on my hands. I am going to dyno the bike this winter to see how I compared to the PO's results 10 years ago. I think I will do again in the summer if I don't change something, see what the difference is if there is an actually difference?   





   

[Led]

Humid weather does affect how they run. However, here in Wisconsin.....the temps AND the humidity can actually vary day to day.   In the 40's and dry one day, and the next day is humid and in the 60's or higher.   So "different" tunes for each, would be virtually unworkable.  

Get Her to run "acceptable" for every weather condition YOU experience, is what I would advise!  And live with it......

Just SOME days......it will seem to run a little better and "crisper".....than other days.....but as long as it is running, all is golden!

[Challenger]

If you could find one of the old dial-a-jet systems, (Not sure if still available) I think that would solve your tuning problem. At least make it easier for you to change tunes per temp and humidity.

[WintrSol]

Engines without computer controls do, generally, run better in colder weather, regardless of the tuning, as the cooler air is denser, so more oxygen per cylinder charge.

[CoreyP]

Engines without computer controls do, generally, run better in colder weather, regardless of the tuning, as the cooler air is denser, so more oxygen per cylinder charge.

That's kind of what I am wondering? There may not be a better tune in the summer. Right now the bike runs better during the winter, the colder the better. Which where I am is 50 degrees maybe high 40's for cold weather.

[Bagger John - #3785]

I always run the Coon Tune on my bet.

B. Gibbons.

[f-Stop]

If you could find one of the old dial-a-jet systems, (Not sure if still available) I think that would solve your tuning problem. At least make it easier for you to change tunes per temp and humidity.

Dial-a-Jet is still around!  And they still make a system for the Valkyrie...
http://thunderproducts.com
(Model DJ-106, $365.95)

Dag Verpeide from Norway installed a Dial-a-Jet system on his Valk and meticulously documented installation, how it works, etc. on his website.  Unfortunately, I don't think his website is up any more.

[CoreyP]

I'm going to check into that.

[Bagger John - #3785]

Dag Verpeide from Norway installed a Dial-a-Jet system on his Valk and meticulously documented installation, how it works, etc. on his website.  Unfortunately, I don't think his website is up any more.

What was the site name - Valkyrie Norway?

ETA:

Sometimes the Wayback Machine is your friend:

https://web.archive.org/web/20160322095504/http://www.valkyrienorway.com/Dial-A-Jet%20NEW.html

[dago mooserider]

I've actually 1/8 mile drag raced my valk several times. The air temp makes a massive difference on how it runs. It's not your imagination. Bike lightly warmed up and very cool night air = 7.5 or 7.6.  In middle of the day and heat soaked engine 7.7 or 7.8 . This is a difference you can feel. For some reason my Valkyrie is more affected by heat and elevation than any of my friends bikes. Carbs are definitely part of it.

[hueco]

Can You Say OCD? My Valk runs like a bat out of hell year round. No adjust.