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95 XR280 jetting question

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Its been over a year now since I helped a buddy install his 280 kit. The bike hasn't seen much action since. It has finally came out of the shed since late spring and he is have a difficult time getting it to run. This isn't my question since I gave him some suggestions to try, so please no help with diagnosing the problem. My question is what is a good jetting combo for this? Elevation about 300 to 2500feet, modified airbox, uni filter supertrap exhaust. If I remember right we increased both jets. I wanna say the pilot was increased 2 sizes and the main was increase 3 or 4. I don't remember the stock jetting or even the sizes we changed it to, but that was the amount we increased them.

Thanks for any feedback.

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I just finished putting in the 280 kit in my son's XR 250 and I upped the pilot from a 40 to a 42 and from a 125 stock main to a 130 and it seams to run stop on at 500 to 2000 feet with the thumper racing insert in the stock exhaust.

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