If it's running great now, and the plugs are a good safe colour, then you might like to go up one size on both main jets, but to be honest tracks are generally better for a two stroke as you never cling on to flat out in any gear for any length of time - what normally kills a two stroke.

Keep an eye on your plugs after each session, and keep notes on any changes you make with relation to the temperature/humidity/elevation. After a while you'll have built up a decent log of how it runs at any given air condition and can jet far more easily.
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