Mammoth Jetting?

Hi we are going up to Mammoth this week and are wondering if anyone has run a YZ 450 up there with a similar configuration, we usually ride at I-5 MX and LACR I run a 42 pilot needle one leaner than the middle and a 162 main.

I will be running the VP U4 Oxygenated fuel up there.

I have installed a 160 main jet and lowered the needle again, any thoughts?

8900 feet if it helps.

No need to rejet burn VP Ultamate 4 your bike will be happy up there :thumbsup::awww::lol:

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