I thought I'd get a spare indicator bulb for my 2012 G650GS-RY10w these are a BAU15s base off set bayonet(called 150 deg) 10watt amber bulb with small round head. $3.60 ea as seen on BMW parts fiche-I can live with that but when you throw in pstg & fact that they are NOT! in a AP's store near you or me they become less loved by this tightwad.
On Modern Vespa some there (sameo on front indicators of a late model Vespa) are taking 1156 amber & removing one stud from base but that's a 27watt bulb, not 10watt. Now looking at Chinese Led's with 1156 base @ the heights of various led's construction types.
What are others doing here-these are also found on other BMW models & I saw same lts/winkers on an Aprilia MC the other day too.
I have this on F650 & not a reply yet.
After searching a bit there are Kawa's,Buell's,HD's, and a few others that use these and as some are finding these bulbs quoted at ridiculous prices over $10 each there's no shortage of people looking at where to buy-@ BMW's price they are actually one of the least $$$. I may switch mine to wedge base, halogen, amber 10w bulbs which are brighter,cheaper & common and Chinese are selling BAU-15s base adaptors on the cheap @ less than $8 for 4. You can buy 10 halogen bulbs & the adapter set for less than some sell the RY10w bulb for one bulb.