interesting ...(not mine)
from CL ad...
"CA plated RS50 with 00/01? cr250 motor. Tag good until 10/18/21. Thought I would learn to ride on it etc. Prefer dirt. Comes with rebuilt 70cc Aprilia motor w/electric start. And a receipt for tuning. Everything to return bike to original is here. Wiring harness intact. Very good condition. Surprise some people in twists. Must go because I'm moving. $3200.00 partial trade considered. Two Stroke! Street Legal! Plated! Starts right up 1st/2nd kick. Very quick. Huge smile factor."
https://sfbay.craigslist.org/eby/mcy/d/oakland-2001-aprilia-rs50/7209895557.html (https://sfbay.craigslist.org/eby/mcy/d/oakland-2001-aprilia-rs50/7209895557.html)