05 RM-Z250 Jetting

I've noticed since the temperature has dropped to below 60 that my RM-Z 250 doesn't start to easy and it needs to warm up with the choke on for about 5 minutes.

Which jet should I change to correct this?

Bike at idle is affected by pilot or slow jet, fuel screw as well to a certain extent. Go up one on the pilot first would be my guess.

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