Hello guys. I recently made some changes on my scooter. New air filter, New spark plug, New petrol filter, New variomatik Naraku Sport 16mm, New clutch Naraku Sport 112mm, New counter-pressure spring Naraku +2000 U/min Sport V.2, New Twist Control Naraku Racing 105mm, Variomatik weights are 3.6g. Has 100 km perfect now sprint it doesn’t work on. Roller has only 4000 km