Sounds strange but here goes......... I've been browsing bits for my gs and saw an ally stick on part for the clocks that gives a sun visor effect, but now cant remember where I saw it, can anyone help!?
Wunderlich do a part which fits directly over the instrument assembly giving both the tacho and speedo a little visor. (Part no.8110174 page 192 in current catalogue; try their web-site) This may also be available from other german suppliers, as I saw it on several customised GS's from different exhibitors in Garmisch.