Welcome to the wonderful world of motorcycles. I didn't mean any offens if any was taken.

Air filters are very important to your bike. Like I said before with out an air filter you are letting all the dirt straight into your engine. It also adds a lot of air making the air/fuel mix leaner. If you run too lean your engine over heats and can cause serious damage. Please only ride it to get some where safe and order up a now filter.

Something like this will probably work not sure the exact size you need but I can see the 45mm stamp on the hose clamp on yours. https://www.amazon.com/UAUS-Degree-Motercycle-Cleaner-150cc-250cc/dp/B08HYMNVD2/ref=asc_df_B08HYMNVD2/?tag=hyprod-20&linkCode=df0&hvadid=494990108093&hvpos=&hvnetw=g&hvrand=13042828173540342842&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9053053&hvtargid=pla-1246189603418&psc=1