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jetting on a 05 yz250 in colorado ? please

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I recently put on SST and Power Core 2 on my stock YZ 250 2 stroke and today I just put in the n3ew needle and everything else is still stock I was having a spooge problem before and would foul plugs when using Yamalube until switching to golden spectro but would still have the spooge problem out my exhaust! my question is what type of jetting should I be using for 5500 to 8000 elevation from 80 to 100 degrees trail riding I recently bought AMSOIL interceptor 2 stroke oil and like I said just put that new jet in today my air filter still drying so I haven't had a chance to try but wanted to see what you guys thought I should run at for the info I provided? Thanks

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