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250sx NECJ Jetting

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I switched to 42 pilot, NECJ needle (3) and a 172 main, and I am at 500' at around 90 degrees. Bike feels INCREDIBLE until I get past 3/4 throttle onto the main jet. When I WOT it seems to just rev but not really go anywhere. Is my main too rich?

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main is way to rich for a suzuki needle 

suzuki thin tipped needles need 2-3 sizes smaller then standard

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Yeah, I saw that 172 and thought, Whoa. I run the necj on #2 with a 162 and 40 pilot here at 3600'.

You probably ought to drop that main down to a 165.

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WAY fat on your main, i'd drop to 168 right off the bat and work down from there. 

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