GS500 in the Mountains

[Marty]

I have an 09 GS500 and I want to make more power.
I live in Denver Colorado so a mile above sea level.
I am installing a yoshimura exhaust, k&n air filter, and increasing jet size, remove restrictor washers.
Any recommendations for jet sizes at this altitude and air/fuel mixture screw?
Will i have to tune on a dyno?
Has anyone done this upgrade at this altitude?
I appreciate all the help I can get.
Thank you

[crackin]

While tuning on a dyno isn't necessary in some peoples opinion, I believe it is an extremely useful tuning tool and i would highly recommend dyno tuning if you really want to make max HP. If you can get cheap dyno time, i say go for it. If not one of the members here does jet kits that will get you in the ball park.
If the bike has "restrictor washers" just removing them will make a world of differance.
Johno