cleaning

I am currently doing a ton of maintenance, valves, cam, brake fluid change(done), coolant, smog block off plates install(done), throttle & clutch cable lubrication, air filter clean, spark plugs(done), new friction plates(done), new crankcase cover(mine was scratched enough to be leaking; done)...

Hey guys, just need some advice. I'm trying to clean my air filter and i've never done it before so idk if my air filter is stock. I have k&n air filter cleaner kit and was wondering if it is ok to use that cleaner on the air filter or if it has to be a certain kind of air filter.

Anybody have any ways to clean the inside of the headlight assembly? i've tried diluting water and alcohol and mixing it around but I would rather actually get in there. Kawi has a factory sealant around the lenses and makes it difficult to get in. ideas?