With it being a 2 stroke you'll need to change your sparkplug more regularly it's a 2 minute job, you unscrew the old one and screw in the New one it's that simple. The air filter will just need the foam removing, cleaning and 're-oiling it will say which oil to use in your bikes manual, mine for example was a specific gear oil. Your brake pads should be simple as well, all I had to do was remove the safety clip then undo the pin, the old brake pads will fall out then you should clean the piston before pushing it back into the caliper and replacing the brake pads then you just need to pump the brake and take it easy the first time you use them. Everything I know I've learnt from being on this forum and YouTube, Google etc and EastAnglianBiker who has helped me loads!