I live in CA, and use 22cc domes for riding at sealevel. I ride at Little Sahara UT, aka:Sand Mountain also. Jeeves says that it is 5,100 feet above sealevel. What domes do you guys pop in and still use pump gas?

 

I would use whatever would keep me close to 150 without going over it. I'm sure someone in here knows what dome size that would be.

 

I'm pretty sure you will be OK with 19cc domes. Or, you can play it safe and use 20cc domes... People around here, 6k to 8k feet use 19cc domes and pump gas.

 

I ride at 5,000 with 19 domes. Your compression will be in the 130-140 range. My Banshee runs great on pump gas. But I did put a hole in my last piston. I believe that was caused by a lean condition more than a compression problem. I am going to ride tommorow with a race gas mixture to see how it runs and to be a little safer.