| Author | Message | ||
     Dvc357 |
Hey Brothers, Anyone else out there about 5500 ft elevation. I live between Centennial and Colorado Springs, Colorado. Altitude runs from about 5500 to 7500 ft above sea level. My 2002 M2 with a stock CV had carb issues. Most of those issues are improved but not perfect. If you are at altitude what jets or other carb mods(high speed, low speed, adjustable needle)work for you? | ||
| Phelan |
Hi again Michael, sorry I just realized I forgot to respond to your email about this. I would check and/or replace your intake seals if you haven't already, as they can be quite troublesome. You might actually be fighting an intake leak or even a carb that needs rebuilt. Rebuilding it is super easy and the rebuild kit only costs like $30, and usually comes with new intake seals to boot. I believe my CV had a 190 main in my Thunderstorm spec'd S2, but I don't remember the slow jet. I switched to a Mikuni on the S2 last year, and parked it for restoration in February when I got the Ulysses. (Message edited by phelan on June 14, 2015) | ||
| Lakes |
Agree check seals i live at sea level, but i ride to a friends that lives at that elevation no issue CV adjust to elevation mine does not have stock jetting i don't notice a loss of power but if it was at a racetrack at that elevation i would see a lower trap speed on time card compared to sea level. i favour the CV over mikuni myself , i race against guys with mikuni, the carb does nothing it's the rider & how well you have your bike tuned | ||
| Dvc357 |
Yea, the carb is a enigma. STILL, Runs great parked. At Park, I can run it for ten minutes at various rpms, rev's smooth, holds at any rpm and revs and drops smoothly. Under load, spits, coughs, randomly drops off. It used to just die when accelerating hard away from a stop. Now just sputters. Did a quickie rebuild on the CV and but this is the best it gets Dont know?!? | ||
| Phelan |
Did you rebuild the accelerator pump? | ||
| Dvc357 |
I disassembled and did an industrial heated parts cleaner. Then replaced all rubber parts, and seals, the slide, slide spring and body screws. I did not replace any other parts. | ||
| Lakes |
What ignition are you using? 7 is motor stock? | ||
| Dvc357 |
Its Stock! | ||
| Jayvee |
Those symptoms seem pretty close to when I had to replace the intake seals on my M2. | ||
| Dvc357 |
Whelp. I did not replace the manifold seals. I dont know what the hell i was thinking. I even have the seals! In the next week i'll have to make the time to pull the carb and replace the manifold seals. I'm running out of possibilities. | ||
| Buell_bert |
I live at about 640 ft. and went to Sturgis which is at least 5500 or more in the mountains and I had a stock M2. Smooth as silk and plenty of power. I would check the intakes. | ||
| Alfau |
watch this 6 times first. https://www.youtube.com/watch?v=sDMjl5O66BM | ||
| Littlebuggles |
Wow, very informative video, thank you! (Maybe now I can get my fuel mileage back into better range) | ||
| Lakes |
When i went to the track every week to bracket race, we got air quality, temp & so on on our time slip. the track is at sea level , but from air quality on day works like elevation if air quality increased, we would be on lean side, if it decreased we would be on rich side, if your elevation changed your AFR it should be to richer, but your talking like it is lean so has to be air leak. but stock jetting on my buell was lean. jet right makes a difference, but you can't tune them till everything else is as it should be, so take manifold off check seals like Ross said. |
