I had to set it about 4.5 mm before tdc on the premium. If the rotors spinning fast enough you’ll see a firing mark about 15* off. Once the bikes running the firing mark shows up somewhere completely different than originally set. This makes for a real erratic idle if it idled at all. That ignition sits on my shelf because weather I mount it to e50 or Derbi I can’t get it to work right. I heard that the Mvt Premium was for 20,000 rpm Peugeot’s.