Banshee at altitude

[Percy]

Hi,

 

I live at around 2500ft above sea and am jetted as such, with DG pipes and a Durablue filter. (Run with lid on, as do a lot of trails in mud etc)

 

We are doing a ride into the mountains. Will start the ride at 4500feet and go to 9000feet above sea. We will only be on this ride for about 6 hours.

 

I understand I will have a horsepower loss and the bike will run rich on the ride.

Can I just remove the airbox lid for the ride, or do I have to rejet for such a short ride?

 

I normally use 97 octane leaded gas, with Motul 600 at 33:1. Should I use the same fuel and mix for this ride, or will it help if I mix the fuel a bit leaner? Say 40:1, more oil=less fuel=leaner? Right?

 

Should I put new plugs just before the ride? and use normal gap?

 

Appreciate any advice.

 

Cheers, Percy