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07 YZ 250F 276 Ice Cube FMF 4.1 Jetting

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Hi, I just picked up my new Vet weapon for this MX season and am looking for some jetting advice. I'm going to an indoor practice/race next weekend and the weather is too nasty to do any testing outdoors. I will be riding mainly at sea level to 500ft above in midwestern weather conditions if that helps. I appreciate any help you guys have!

2007 YZ 250F

RPM Ice Cube 276cc

FMF 4.1 Pipe w/ megabomb header

Hot Cams Stage 2 intake and exhaust cams

Boyesen quickshot

Twin Air Powerflow air filter and cage

Also looking for advice on fuels, we can only get 91 octane premium locally, should I be using race fuel?

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