Japan is the country of Estrella... ...so I have found how they call the Estrella in Japan : エストレア I do not know if it means "star". However it is very helpfull for searching pictures or information about Estrella on japanese websites !
@ the french ant, hi ant, this "legierung" at the engine is called "magnesium". it's a very lightweight, but also very expensive material. the most motorcycle-producer offer it only at the hight-performance bikes or at racing-bikes. ducati for example offers magnesium clutch-covers, but the prices ar horrible. usualy the motorcycle-manufactors don't use magnesium in the production of serial-bikes. cu virginia Brave Mädchen kommen in den Himmel - böse Mädchen kommen ÜBERALL hin.