The Bay Area Two Strokes (BATS) are having a ride on Saturday April 24th through the Marin Mountains. I've recently been hanging out at 1977 and Tweetland where I've been meeting some of the local Loin, there has been interest in the BATS rides and the two-smokin' bikes that we ride.
We ride Derbi GPRs and Aprilia RS50s, ~50-80cc two-strokes, very similar to the moped engine bikes with more plastics hiding what's underneath - kind of a shame really to hide these smokers. We use the same kits (Metrakit, Malossi, Polini, etc) pipes, and carbs on our bikes that are used on the mopeds. Think of us as lost wayward brothers. There is so much overlap it seems natural to intermingle.
If you are interested in exercising your bike these roads provide much twisty entertainment and you may find this ride to your liking. Below is a link to the post discussing the ride on the Bats forum (you may need to create an account to see the images) and a link to the google map of the route.