I've got a couple of spare rear indicators so I thought I'd convert a set to sequential indicators. After a bit of looking and measuring I bought a set of four for $30.00 Au.https://www.aliexpress.com/item/4001078052317.html? They seem to have quite a few different sets so I found one set that listed it suitable for a K75.

It turned out the only modification required was to the globe holders which required the removal of the globe contacts. These can be refitted at anytime if you go back to OEM. The sequential indicators are a tight fit but can be pushed into the socket with by either greasing or by reducing the diameter of the rubber mount. They fit pretty tight but for added security I applied a bit of hot glue. The wires that go into the OEM wiring require the fitting of spade connectors, these wires were also reduced in length. You could also gain more room in the housing by shortening the wires between the resistor and the indicators. I also wrapped a bit of tape around the connections to the OEM wiring. They will however fit without shortening with a bit of wrangling.

 The whole job took around 1.5 hours but could be done a lot faster. I also looked at converting the front K75s indicators and while it could be done slicing and dicing would be required. With the scarcity of K75s indicator in OZ I was reluctant to carve up mine. I tried to get pictures of the sequences but most shots turned out unlit.
Regards Martin.

MartinW wrote:I've got a couple of spare rear indicators so I thought I'd convert a set to sequential indicators. After a bit of looking and measuring I bought a set of four for $30.00 Au.https://www.aliexpress.com/item/4001078052317.html? They seem to have quite a few different sets so I found one set that listed it suitable for a K75.

It turned out the only modification required was to the globe holders which required the removal of the globe contacts. These can be refitted at anytime if you go back to OEM. The sequential indicators are a tight fit but can be pushed into the socket with by either greasing or by reducing the diameter of the rubber mount. They fit pretty tight but for added security I applied a bit of hot glue. The wires that go into the OEM wiring require the fitting of spade connectors, these wires were also reduced in length. You could also gain more room in the housing by shortening the wires between the resistor and the indicators. I also wrapped a bit of tape around the connections to the OEM wiring. They will however fit without shortening with a bit of wrangling.

My brain says No! NOOOOO! DON'T DO IT but my life-force emotions make me reach for the wallet haha!

It's so easy to do and easily reversible and they look so cool. The pictures show the start of the sequence and the three quarter point, and for some reason they are brighter in reality. I'd love to do the front as well but I don't want to chop them, I'll have another look. There must be a way.
Regards Martin.

I had a pair of those on the back of my Ducati Supersport. They looked very nice in the garage, but my riding partner complained that they were not very visible as indicators. I reverted back to the originals.

Thanks Bob they seem ok at the moment but I'll do more testing tomorrow.
Regards Martin.

BobT wrote:I had a pair of those on the back of my Ducati Supersport. They looked very nice in the garage, but my riding partner complained that they were not very visible as indicators. I reverted back to the originals.

Hmmm... I wonder whether it's a matter of light diffusion through a cover lens designed for an incandescent bulb, whose light generates more of a light point rather than a light line.

This naturally makes me think whether these sequential LED lights would perhaps be more visible on the road if used without the BMW OEM amber cover. Thoughts?

DadofHedgehog wrote:

BobT wrote:I had a pair of those on the back of my Ducati Supersport. They looked very nice in the garage, but my riding partner complained that they were not very visible as indicators. I reverted back to the originals.

Hmmm... I wonder whether it's a matter of light diffusion through a cover lens designed for an incandescent bulb, whose light generates more of a light point rather than a light line.

This naturally makes me think whether these sequential LED lights would perhaps be more visible on the road if used without the BMW OEM amber cover.   Thoughts?

Mine were used without the cover, you could say that they were nude. 

Ohhhh, I like them!

Looks pretty eye-catching to me.

I'd say the original lens definitely defuses the light. 
would it be possible to blank the original hole and fit these as is?

It's possible to fit them as a stand alone item, but I didn't want to change the stock appearance. It's a nice sunny day today so I'll take it out and check the brightness.
Regards Martin.

Are my eyes decieving me or is that top box a larger version than my standard size?

Thou eyes do deceive thee. Standard 22Lt, camera angle makes it look bigger.
Regards martin.

The Mk 1 versions weren't really bright enough in full sun. In the Mk 2 version I fitted two sequential indicators into the OEM housing, and as expected still not bright enough. Onto the Mk 3 version, I had a friend mill out two slots in the OEM lenses. After a little bit of fettling with a Dremel and files I achieved a good fit. I used clear silicone where the indicators fit into the slots and used a hot glue gun to glue the lower one to the bottom of the lens then glued the upper to the lower one with additional gluing at the entry point. A portion of the bulb holder surround had to be removed in order to allow access. As an added precaution I packed the area around the indicators and the back of the housing with heat proof foam. 

Initially I had the heat sinks inside the rear indicator housing, however I spent yesterday and this morning moving the heat sinks to a more suitable position on the rear frame rails under the start of the ducktail.  The heat sinks do heat up quite a bit and I didn't want to melt anything. The Mk 3 versions are quite visible in full sun and a couple of guys wanted Mk 3 versions, however only one extra set was made. Apparently it was a nerve racking job and a problem with the CNC machine compounded the stress. I would like to thank Peter from the Trades Guild for undertaking this job twice. He won't be doing any more, he's off to his psychiatrist.
Regards Martin.