Finally got the tuning on my sachs sorted out.
70cc athena kit on a balboa, 19mm PHBG 85/50/60 (50 pilot is way rich, need to order a 40), derestricted SPX alsil pipe, 44/13 gears, 2.25 17" savas on snowflakes, trailtech cht gauge, general hydro forks to add some trail/rake in and make it handle less sketchy.
52mph top speed on a short downhill, 50.5mph on a short flat, all GPS. Still pulls up hills. 348 degree top CHT.
Think I can run a slightly leaner main and a little more advance to eek a bit more power out, but super stoked I broke 50. Was stuck at 40 for forever, but kept dialing it in. Got it running good and hit 42 with stock gearing then ground the cases down to put on the 13 front and gear up.