elevation changes and jetting

[breakdirt916]

at what point have you guys changed jetting for elevation changes?

I run my dr200 in long beach - starts the moment I hit the starter button

up in gorman, CA (3,000-6,000 feet), it initially started and ran okay for the first couple hours, but after the bike warmed up and got run harder, it wouldn't idle anymore, and had a tough time starting...then it would stall after riding it 2-3 mins (independent of throttle position), but if I let it sit it would start a few mins later. I guessed it was a sticking float, but when I took off the bowl, the float was working fine

I thought I fouled a plug or clogged the pilot jet, but I brought the bike home, parked it a week, and just turned it over for kicks and it started right up

now, I've never changed a jet in MA going from the worcester area to riding with fasteddie or james, or even when the temperature changed...so I felt like it was a myth, haha

but that have been my problem?

I got a couple larger pilots to try it out

[OreoGaborio]

Don't have much to add other than you need to go leaner for higher alt's, not richer. And yes, 3-6k feet can make a difference.

[G21forme]

Don't have much to add other than you need to go leaner for higher alt's, not richer. And yes, 3-6k feet can make a difference.

This, rode up a 5k mountain once, my bike is fuel injected the other carbs and literally the other rider had to throttle and feather the clutch to keep it running.

[breakdirt916]

now I'm completely mixed up - started the bike just now...fired right up, and let it idle for 2-3 mins, then went down the street - no problem. 5 mins into the ride, anything under 1/8th throttle and the bike was ready to stall...no more idle when warm

it was worse when I was up there, but I wonder if I clogged the pilot jet (that would explain a stall < 1/8th throttle). But if that's the case, why would it start and idle when cold?

but yes - I had that backwards, higher altitudes = smaller PJ's