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This seems strange to me

Joined Feb 2007
33 Posts | 0+
My 1999 501 runs well at 1500 ft. When cold I put full choke and kick it through twice slow to prime the carb - then no choke and one good kick usually gets her going. Let it warm up for about 30 seconds and I can be on my way.

Anyway - this week I took it up to Utah - up to 6000 ft and it was a total bear. It took me an hour to get it started in the morning and then it woudn't idle even when warm unless I had about 1/4 choke dialed in.

Of course as I drove around the choke vibrated off and then when I stopped it would die again. At 1500 ft when warm it idles great and started easy with one kick - at altitude I had to choke it and it took three or more kicks to get it going again when it stalled even when good and warm. argh!

does this make sense that I have to choke it at higher altitude? Maybe I'm an ***** but I thought the choke made it run richer? And high altitude made it also run richer? So why do I have to choke it more at altitude?

Is this normal? If it's tuned for 1500 ft do i have to rejet before I take it up to the mountains?

or is there maybe something else going on?
 
oh and I have no idea what's in the carb now - when I bought it, it was sitting in a garage and never had to mess with the carb other than cleaning ('till now!)
 
did you run it aga back at 1,500 feet yet?

that way you KNOW that itwas altitude related. if not yu have a blockage in the carb i think.

please check she runs ok back home.

regards

Taffy
 
it's possibly smething to do with the way you started it first time. you needed a different technique and didn't so you essentially wet the plug. it was a case then of lots of fuel starts the bike rather than the usual little amount.

as for idleand restarts? mmmmmmmm?

well again it needs to be lean to restart and it would appear to have been rich.

difficult one.

i think dale would have a crack at at and when he does - let me know the answer as well!!!

regards

Taffy
 
your prolly right - either that or something's changed and I just haven't figured it out yet.

kinda frustrating that the only time I'e had trouble with it is on the one big trip I made so far
:(
 

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