I had is accidentally tipped a little oil in the tank. Then have the tank emptied and my scooter ran a while back to normal. After some time, probably oil residues have set in the carburetor and my scooter lurched heavily, then I Liqui Moly poured into the tank. The first time came in no improvement. Then stand the scooter during my vacation for 3 weeks in the garage when I came back the scooter a time again ran smoothly but then caught the jerk again and I still have times 3 liters given half a bottle to about V-Power premium gasoline and after approx 10 km was the carburetor and free from my scooter went as a suppository. Conclusion, the dilution as specified by the manufacturer is insufficient in acute constipation and probably used only for prevention. Man leisure little patience and the mixture has to be right. Stehter big oaks.