New Apollo 250 Oil filter & Sprocket?

[CarterClysm888]

My bike was delivered last week. Once I got it together I pulled the oil drain plug, expecting to find an Oil filter. But all that's there is a spring & a little wire mesh screen. Does anybody know of a cartridge style oil filter that works in the motors? Also when I down shift, I hear a bit if chatter coming from down by the shift lever. The chain is adjusted correctly. So I took of the front Sprocket cover, I found that the Sprocket has a bit of play on the shaft. Not so much rotational play, side to side I can tilt the Sprocket back & forth a bit. Has any had or heard of this issue?