In Feb 2018 California is supposedly going to introduce a new law that will ban 2-strokes from public lands. New York is next, with other north eastern USA states to follow, and who knows where else.
If I understand this scenario correctly, the red sticker program was made available some years ago simply to give racers a place to practice for 5 months out of the year. The story goes that CARB recently surveyed a few thousand California red sticker bike owners (almost all 2-strokes with a few 4-strokes scattered in) and found that something like only 5 out of 100 riders are actual racers – 95% being weekend warriors, hacks, or trail riders.
CARB has since decided to close this loophole from being “exploited” by Average Joe & his 2-stroke (or XC/MX 4-stroke).
To put it another way, if this law is pushed through (many say it’s a formality), you will be restricted to riding your shiny new 2018 300XCW (and similar bikes) either on a track or on your own property – nowhere else.