2016 evo 300 jetting??

[theo]

I am close to buying a used 2016 Evo 300(my first trials bike). The bike is currently set up for sea level. I live at about 1400m (4600ft). What, if any jetting changes will I have to make? Is there a jetting chart available for this bike?

On another note. The motor currently has about 100hrs on it with original piston. Is this an issue yet? When will I need to rebuild it? It has been ridden mostly on trails with some technical bits.

Thanks for helping a trials rookie out!!