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08 wont start cold!!

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I just put a 13.5:1 JE piston and a stage 2 hotcam in my bike and its running on VP U4.4. it take around 50 kicks to get this thing started when cold and I have to kick it like very hard. once its warm it'll fire up 1 kick but when its cold it seems impossible. I've tried pumping the gas multiple times, choke, no choke, hot start and it only seems to fire up when the choke is off. every time I kick it seems like its trying to start(if that makes any sense) but it never does.

I'm ice racing my bike and the average temp is around 20 degrees F.

I have maybe 2 hours on the rebuild and i have been messing around with the jets alot(not sure what size im at now I'll have to check.

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u4.4 is an oxygenated fuel, will require richening up. Not sure if that affects starting, but it WILL run lean compared to pump gas.

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