Boxerworks.com

While searching internet for H4 LED bulbs most of the information was that the OEM housing was not designed to correctly focus the light emitted by the LED's.

Then I found this product.
https://www.summitracing.com/parts/sum- ... 8kQAvD_BwE

It has a glass lens and DOT approved.

Not affiliated at all with summit racing

Think this would fit in the R100RT headlight bucket?

Not really, Most airheads, Road models anyway, take a ten inch reflector. This on is only seven inches. I suppose it would be possible to arrange some sort of surround to take up the extra space but it certainly isn't plug and play.

Rob

Rob Frankham wrote: ↑Fri Aug 15, 2025 5:20 am Most airheads, Road models anyway, take a ten inch reflector.

10 inch reflector !!!! ????? hmmm

gspd wrote: ↑Fri Aug 15, 2025 2:17 pm

Rob Frankham wrote: ↑Fri Aug 15, 2025 5:20 am Most airheads, Road models anyway, take a ten inch reflector.

10 inch reflector !!!! ????? hmmm

Hmm, I'll have to go and measure one... but I'm sure it's not 7" so the rest of the comment applies...

Rob

8" except for R45/65's which are smaller

My '73 R75/5's are aprox. 6 1/2". I even matched them up to a 7" and they are smaller.

Tom

Tom H Ca wrote: ↑Sat Aug 16, 2025 9:20 am My '73 R75/5's are aprox. 6 1/2". I even matched them up to a 7" and they are smaller.

Tom

Same size as the R65 headlamp which can be used to upgrade a/5 to a H4 halogen bulb.

barryh wrote: ↑Sat Aug 16, 2025 5:47 am 8" except for R45/65's which are smaller

Absolutely right 8 inch by the tape measure. Apologies, my memory ain't what it used to be... but a 7inch reflector still won't fit...

Rob

If you're looking to upgrade your headlight to LED, here's an option. It's a smaller headlamp with an adaptor ring. I have not installed one, so I can't comment on the product other than it exists. http://www.motoelekt.com/lighting.htm