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2005 CRF450R Jetting for Vegas to Reno

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Just wanted to run this by anyone in the given area.

My Bike is a 2005 CRF450R All stock, no aftermarket pipe, etc. All stock.

The current Jetting spec is:

pilot screw opening - 1 7/8 turns out

Slow jet #42

Jet Needle NGGQ

Needle clip 4th Groove

Main Jet #168

Float 0.31 in

This jetting is great in Texas but -

I want to run this bike in next years Vegas to Reno race.

I'm looking at the owners manual, and taking a swag at the average altitude of this race, judging it to be in the 5000ft to 7500ft range, and temp around 79 to 100 degrees in August, their suggestion is:

pilot screw opening - 1 5/8 turns out

Slow jet #40

Jet Needle NGGQ

Needle clip 3rd Groove

Main Jet #162

Float 0.31 in

Can anyone in the know confirm whether this is about the right jetting spec for this area (for the bike mentioned), and if not offer a counter suggestion based off of riding a like bike in the same area? Many Thanks.

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