I'm a long time freeride and DH MTB guy that was finally talked into a bike with a motor by the best friend a man could have! I happened to drive by a garage sale and saw this bike in the driveway. Turned out to be a 99 YZ 125 that ran but had "piston slap". It was really only ridden a season then sat under a tarp in a garage for over a decade till I came along. I called up a lifelong friend who's been riding moto for years, sent him a picture, and he basically made my buy it. The guy also threw in a brand new spark arrestor. I dragged it up to my buddy's place, and "we" completely rebuilt it. New bearings, crank, clutch, complete rebuild. So, a few hundred bucks bucks and couple cases of beer later, I finally have my first dirt bike and I've wanted one my entire life. The bummer is I moved and now live over 8,500ft. My buddy has never jetted a bike for this altitude and said 2 strokes are finicky as hell and I needed better advice than he had. I need some help jetting it so if your have the technical knowledge I seek, PLEASE respond to my high altitude jetting post. Cheers and hope everyone has an awesome safe summer!