Tony, you are well read on here and perhaps elsewhere on your jetting problems. I ride a 200, but I suggest that everything would appear to be ok on your carb, but the jetting. With the stock pipe and your elevation, I would suggest a 38 pilot and a 140 or 142 main, with the needle second clip from the top. Being new and riding trails, you are riding primarily on the primary circuit and the hit comes when you get on the main and clean things out and then your bike begins to run like it should. With the stock pipe, your elevation and hot weather, even a 38 may be too rich. Not many 2 stroke engines that I have ever heard of seize at low speed! Jetting will do more for your bike than anything else for the money, next is springs in the forks. Cheers John