Whether you don't want to buy a better air filter or you're waiting for a new one to get shipped, here's an extremely easy mod that will improve air-flow and boost performance!
Simply break out the power drill, and add extra holes on the back of the stock air-filter cover! And that's it!
I've done this myself, and you can definitely tell the difference! Want to go even further? You can improve airflow even more by cutting off the 4 tubes at the bottom of the cover! Who needs 'em? Sometimes they even get in the way of the frame too, which is actually the main reason I clipped them off. You can also try cutting out as much of the inner bracket [that keeps the air filter in place] as possible! The less that's in the way the better! It all adds up, after all.
A warning to those looking to mod their motorized bicycles:
Most, if not all, of the hacks and mods featured on this site were made by individual hobbyists. If you are new to working with 2-stroke bicycle engines, please by aware that there's a possibility that a mod featured on this site could seriously damage your engine. Please don't try any mod from this or any other site unless you fully understand what you are doing. The owner of this blog will not be held responsible for both material and bodily damage caused by performing a modification featured on this blog. Also remember that opening up your engine may void your warranty!