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[St.Pete]

Hi All,
I had a couple mods done over the winter.  Replaced the Cobra fuel processor with a Power Commander 3 and had a Woods gear drive cam installed.  I don't have the cam info at hand but except for the gear drive it isn't alot different than stock.  I didn't want to give up the reliability factor.  Other than a K&N air filter and Vance and Hines slash cut mufflers the drive train is stock.  I went from 86 HP and 92 Lbs torgue to 94 HP and 110 Lbs torque.  It is tuned superb for where I live which is sea level.  So here is the question.  I'm going to spend 5 weeks in Colorado, Wyoming and Montana this summer.  I'll probably be at 5000 ft or above most of the time.  One pass in Wyoming that we'll be crossing is over 10000ft.  How is my FLHRSEI2 likely to run at those altidudes?  Anyone have any experience with a similar situation?  Thanks  St. Pete

[SEULTRA]

St. Pete,
You're going to experience some of the most beautiful scenery (and riding) anywhere. I live and ride at 6200 ft and above. One thing you will notice is a decrease in performance. Simple physics ... more altitude = less oxygen. This won't hurt your bike or be dangerous... just keep it in mind when passing other vehicles.

[CVOJOE]

St. Pete,
Nice looking SERK, but of course I'm pre-loaded to appreciating the SERK's especially 100th Anniversary models. As was said already, nothing you can really do as far as the altitude business. There is supposed to be some automatic compensation done via a sensor and the ECU, but very limited as I remember. The airs thinner and that means less volume to combust. Also, if you haven't been in those areas, you'll definitely feel the altitude yourself and it takes a few days for the ole bod to adjust and more tired,  affects you more etc. Enjoy!
Joe

[cuthbertss]

St. Pete,
You're going to experience some of the most beautiful scenery (and riding) anywhere. I live and ride at 6200 ft and above. One thing you will notice is a decrease in performance. Simple physics ... more altitude = less oxygen. This won't hurt your bike or be dangerous... just keep it in mind when passing other vehicles.

I completely agree with Jay....
the difference is small, but seems huge when you are trying to apss that 18 wheeler..just keep it in mind....
enjoy the trip..you will see some awesome terrain....and if you end up near Co Springs we can do a mini CVO gathering...
I even have somes Del's mix on hand if your home sick by then!!!

[hdbrad03]

The wife and I did 5600 mile trip last summer to Idaho and National Hog Rally. We also traveled Beartooth Pass. Both Bikes ran extremely well. Mine a 06 Road Glide and at that time she had an 05 Deluxe. Our gas milage was even better at higher altitudes. No issue for us. 

[RJ749]

St.Pete,

When we had our GTG in Cripple Creek we rode the week through Colorado and did Mt Evans and many did Pikes Peak as well.  Can't recall anyone having any issues with the altitude.  As mentioned earlier we did get great gas mileage which we attributed to the fuel having no ethanol additive like ours at home does, altitude may play into this as well.

Have a great trip and take lots of pictures.  The lake on the way to the 14,000 foot summit of Mt. Evans.

[Talon]

I live in Colorado, ride over 11,000 many times a year. You'll notice some loss of power, but with drop offs of 100's of feet, you don't want to be going to fast anyway!! 
I ride two up on my stock 88 and it does fine, EFI is a big help, my buddies with carbs notice the change much more than I do. But then again we start out at 5000 feet!
Altitude probably affect you more than the bike! You could be a cheep drunk at 7000'!

[azbiker]

My ride was tweaked with the H-D race tuner (100 ft pounds and 103 HP), no baffle on the stock air cleaner, H-D 6th gear retrofit and a 21 tooth primary vs stock 25 tooth. The bike is based in Santa Fe (7990 feet at the house). I have all the acceleration and power to ride comfortably. The extra displacement helps compensate for the altitude versus a stock 88.  On occasion, I pull a limited edition (one of six) matching Bushtec Quantum GL trailer. The bike runs a lot better than I do!

[Screamin]

We're at 900' and did Colorado a couple of summers ago. 103, race tuner, slip ons, S/E air filter. Had all the power we could use two up and loaded to the max. Plenty fast on the high plains as well. No worries mate.

[St.Pete]

Thanks for all the helpfull info.  I'll go forward without the concern.  St.Pete

[Gettinold]

I live in Colorado, ride over 11,000 many times a year. You'll notice some loss of power, but with drop offs of 100's of feet, you don't want to be going to fast anyway!! 
I ride two up on my stock 88 and it does fine, EFI is a big help, my buddies with carbs notice the change much more than I do. But then again we start out at 5000 feet!
Altitude probably affect you more than the bike! You could be a cheep drunk at 7000'!

ST. PETE, TALON HAS GOOD ADVISE ON ON THE LOSS OF POWER, AND NOT PUSHING THE BIKE FASTER THAN YOU NEED TO GO THRU THE HILLS. YOU WILL NOTICE ALOT MORE SHIFTING TO REMAIN IN THE CORRECT POWER RANGE OF RPMS. TAKE IT EASY AND ENJOY THE SCENERY.