I advise against doing it on a bike unless you are very experienced and know what you are doing; as it is all very exposed, with dangerous and humid sections, at times landslides. Furthermore, the path to get there is very steep with very narrow hairpin bends. Even if you want to afterwards you have to push the bike because the next stretch is not suitable for cycling. Rather, it is better to do the southernmost section which is safer and a lot of fun!