Lets get a bit more specific.. Please
My Snow Trac has the VW 1,600 cc. engine in single port configuration.
At 4-6K ft., would you get by with going one jet leaner, or would it take two or more?
It looks easy enough to do, changing jets.
This flatlander needs to know about this, if I am going to Colorado to play.
At Pikes Peak a year ago I saw some older motorcycles that were suffering from the altitude. It did not look like fun.
Regards, Kirk