Servus, I’ve had the problem since the end of last year that the scooter has performance problems. I’ve tried everything spark plug swapped, air filter new … nothing has brought anything. Then I, I have no idea why, the air intake to c.a 90% covered with tank tape and the scooter ran again 1a. Thus the scooter runs to lean or? What exactly should I do now? (Performance problems at 1/4 2/4 3/4 and full gas)