Well, Willow is about 2500', I think and it's usually warm that time of the year. Not very humid at all. I am racing this weekend and it'll be 110 in the shade
Anyway, I only know one guy that is racing an NSR at Willow. I can get his baseline settings, but I would plan on 2 sizes leaner and do the plug chops. Or just leave as is and go one step at a time. 128 mains sound fairly lean to me.
As for rides, I live in 91377 zip code. It's about 7 miles from the famous Rock Store and right on the Malibu canyons and Santa Monica Mountains. I would be happy to show you around and arrange a 2 stroke ride. I race the 20/21 of October, so as long as it's not then, we can have some fun.
Cheers,
Joel
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1994 MC28 Rothman
TSR250 AC28M