Re: Vintage Miyata Road Bike - First Build
I can't comment on the jetting issue other than I bet you will have to solder and drill the jet to a smaller size. I doubt that adjusting the needle clip position will be enough. The air certainly is thinner 3K feet up.
Be careful of that chain tensioner. That particular style loves to eat rear wheels for lunch. Considering that you just built the wheel, that would be a travesty.
Here are some threads to give you an idea:
"It's a chinagirl. It's a sometimes fun little engine that often will break your heart. It's disposable.
Does not come with a fortune cookie."