Rejetting at altitude?

[bobbyduck]

Hi everyone,

 

I have a 2006 RSTD and have read several posts (and Freebird's excellent detailed step-by-step picture show - Thanks!) regarding 17.5 pilots and going up one size on all main jets. I have a question about altitude.

 

I am at 3500 feet in Calgary, AB and often travel the Rockies at 6000 ft plus...

 

I have K&Ns, BUB slipons and the Dyna ignition module. Has anyone with similar equipment run for long periods at 3500 - 6000 feet? If so, how did the richer mixture work out?

 

I'm for anything that adds smooth and more HPs but don't want to go the wrong direction and end up too rich....

 

Oh and I pull an Aspen Classic which is large as trailers go - probably 500 pounds loaded

 

[Tom]

I went to Ft Collins Rally last year and am from Texas,not much in altitude, In Colorado went up to 12,600+ feet numerous times with only an occasional pop as far as power really didnt notice that much of a loss. Tom

[sarges46]

Same here...not much for elevation in the prairies. No problems at height in Colorado either. I just needed to remember to keep the revs up.

 

Now, I know nothing of the stuff you have added and whether it would need new jets. Mine is a stock carb set-up...no dyno or anything.

[bobbyduck]

In re-reading my post at the top of this thread and the responses (Thanks!) I see that I wasn't clear. (Gee, I knew what I meant..!)

 

I would like to have more power and crisper response, especially at lower speeds. It seems from several threads that with the simple mods that I already have, going up one size on the pilot and main jets has helped others with similar minor mods. But the threads I read were from lower elevations, like in Michigan below 1000 feet.

 

What I would like to know is, has anyone with the larger pilots and mains spent enough time at altitude (3500 - 10000 ft) to know if the larger jets result in a "too rich" mixture while up high?

[Gene-b]

I live in Denver Colorado 5280 ft above sea level. I have the BUB (sleppers) pipes and K&N filters. No other mods have been made. I ride to high elevations almost every weekend (during the summer) between 7 and 10,000 ft. I have never re-jeted. I'm on my second venture I had a 2002 and now my 2007.

 

At around 9500 ft or so I will get a little backfire on when slowing, not bad. Just enough to sound cool!

 

I've got plenty of power and responce for my riding style. I do like to let it go everynow and then. I ride 2 up most of the time, I'm lucky my wife likes to ride with me. I've never pulled a triler however so I don't know what would happen with the extra weight. Anyway, I hope this helps.

 

Gene

[bobbyduck]

Hi All,

 

I very much appreciate the input - I was also in Rocky Mountain National Park last year, up over the top at 12000+, had similar low-impact experiences. All worked very well, maybe popped a little sometimes.....

 

But of course my debate with myself is whether to re-jet or not, given I'd like the increased low-end response but don't want to go "over-rich" at altitude.

 

So I'm still holding out hope that a reader will post who has (A) already gone up one size on main and pilot jets, (B) is running K&Ns, higher flow slip-ons such as BUB sleepers, and the Dyna ignition, and © has spent enough time at significant altitude to know whether or not it was an issue for their bike.

[Eck]

Ha...

I quickly read the "title" of your post, and I thought it said.

Rejetting my attitude...:rotf:

And here I was all excited about finding out how in the hell I could do that...

[bobbyduck]

Ha...

 

I quickly read the "title" of your post, and I thought it said.

Rejetting my attitude...:rotf:

 

And here I was all excited about finding out how in the hell I could do that...

 

Yeah if you find out how to rejet attitudes, I'm sure my wife would want to lay in a BIG stock of those parts to try on me! Don't tell her, OK?