Are you sure it's a PX? IIRC that is a 2 stroke.

My "2nd bike" is a 2008 Genuine Rattler 110 2-stroke. The thing is a laugh riot. It will run approx. 60 MPH flat-out, gets 70MPG, & turns on a dime. I use it for local errands. There is plenty of storage under the seat & it has a rear rack.