Welcome Kymco Owners!
ebay motors under xciting 500 & parts and accesories has two types of K&N style filters for sale. One is from DNA @ about $60-$70. And another for around $52.00 I think. Much better than foam.
No the 2 pin connector allows you to defeat the side stand switch. Short the two wiresand the bike thinks the side stand is down all the time.
Quote "most air intake systems are designed to be a balance between quiet, rather than performance"I agree with that. The intake on my Yager was a tiny hose that comes from the front of the seat. In the middle it has a coupler that reduces it to 3/4".I may give the airfilter a bit more surface area once it needs replacing.