For the area this route is very good. Use some caution when heading North across 214, there is a hump in the road and if you are accelerating hard your front end will lift up.
***THIS ROAD IS CLOSED TO MOTORCYCLES ON WEEKENDS AND HOLIDAYS*** And you will see signs on each end to the effect. Starting from the B48 (see Review) at Johaniskreuz / Schwarzbach and heading East towards Frankeneck you will be going downhill the whole way. The road is in pretty good shape and passed through about 5 villages with only two that make you really slow down. It is full of tight sweeping corners and a few very sharp corners because if follows a stream from top to bottom. You really don't see a lot of motorcycles on the route due to the fact that you can only ride during the weekdays and I have never seen the police. It's easy to keep a good pace and while there are very few straight-a-ways, there are several opportunities to pass if you get behind a slower vehicle. The roads on either end of the L499 are both fantastic rides. If you head down towards Frankeneck be sure to take a left at the B39 towards Frankenstein for another really good twisty road (but with heavier traffic).
The L48 cuts through the Palatinate Forest Biosphere reserve nature park. Plenty of curves as it follows a stream through a steep canyon. The forest is so thick that even on sunny days, much of the road is in the shade. I saw a lot of sportbikes there so, it's popular with the local riders.