Often (most often?) motorcyclists aren't interested in taking the shortest or the quickest route but they want the most scenic route with the windiest roads. Is it possible to ionclude this feature in MapFactor?
(Edit: MNF, like many other OSM based nav apps, is dependent on the data inside openstreetmap. It's not an MNF only feature request)
This has been discussed in several forums and mailing lists. Motor cyclists and other "touristic" drivers would like an additional tag for <highway> describing these kind of roads.
Note that the motorroad=yes tag is a different (German) tag and has nothing to do with motor cycles.
Due to this missing tag it is very difficult to make a "Scenic" routing profile for this in any OSM based navigation app.
What you could do yourself is create a new profile where you block the motorways and/or trunks (called primary way in MNF) or give them a much lower priority then the default 50%. This should at least help you in staying away from the big roads.
However, sometimes even the motorway or trunk is a nice scenic road.