My 4 mil long rod Banshee runs strong. We ride at the Oregon dunes. It has stock carb bored out to 28mm. Compression is at 180 psi.(110 octane fuel). I have 310 mains in it now. Banshee # 2 has stock head milled and carb bored out to 28mm also. don't know what it has for mains. Just bought it.
We are going to St Anthony's over the 4th holiday. They run great at sea level, but St Anthony's is at 4000 -5000 ft. above sea level.
What mains should I run there?
Just want to get them as close as I can so I can spend my time riding instead of tuning.
Thanks,
Tony