Hey guys, so I've derestricted my scooter yesterday (there was an electronic sensor near my kickstarter which could be disabled by simply unplugging its wire). I've noticed that when reaching speeds above 55KM/h, the exhaust and the air filter starts making strange noises and shakes like crazy. Also, I've noticed that there were signs of oil on my air filter, though I cleaned it and they dont seem to appear again. My scooter is Mosca FAVA 49CC. Top speed is 65 KM/h, and sometimes reaches even 70.
Oil on my air filter

Strange noises and shaky air filter