I'm trying to sort out a turn signal problem on an R80/7. All the bulbs are lighting (one side at a time, correctly), but the flashing is way too fast. It's so fast it almost looks continuous. I checked the all the grounds at the bulbs, and I checked the wiring to and from the relay, and it all looks OK. The only out-of-spec thing I can find is that there are 12V 21W bulbs in all the turn signals. The parts fiche shows 15W bulbs. Is there a common (i.e. auto parts store) part number for 15W turn signal bulbs that will fit? I figure more wattage = more current = different flashing rate from the flasher. I'd like to try the correct bulbs before I order a $60 relay, but if I have to order a special BMW bulb I might as well order all of them at once. p.s. I tried searching but search appears to be down.