High altitude jets for carb

I just bought a 2003 250 te recon es from an older couple for use mostly on my 10 farm for spraying and generally getting around. This unit has been very well taken care of, very few hours as they are getting up in years. They cover and clean all their implements in ways I have never done.
Anyway I’m close to 5000 feet above sea level and I believe this one has never had the the jets installed in the carb for this altitude. I would like to buy and install the jets. I am pretty well versed in Honda mechanics as I have owned motorcycles all my life, but I can’t seem to find any jets or directions on line. Can anyone help me with this task?

I have the owners manual, still in the plastic bag they got it in, but it does not provide any help…slim