Hello everyone, so today i bought a 64 main jet for my yamaha aerox, and I took out the old 60 one, put in the new one, screwed everything back up and it doesn't start now. I have tried changing the spark plug with a new unused one, been trying to start it with the kickstart and the killswitch, I put the old main jet back in and it still doesn't start. Nothing else was done other than unscrew the main jet. Any reasons why it wont start? My setup is a Yasuni R, 3.7g rollers and yellow clutch springs, going to put in a yellow big spring (i dont know what its called in english) in a few days.