Honda-SOHC

This is the LED that I fitted to the original reflector on my F1 which is a direct replacement for the original bulb that you have (P45T).


https://www.classiccarleds.co.uk/products/compact-direct-fit-p45t-r2-led-hi-lo-beam-conversion-5-15-volts-410-423?_pos=3&_sid=a1490a3e3&_ss=r



While you're at it I recommend updating the side light bulb as well (BA9S).
It's very bright and would almost suffice as a day running light.

https://www.classiccarleds.co.uk/products/ba9s-bright-white-200-lumen-t4w-233-led-drl-sidelight-upgrade-bulb-llb233-llb989?_pos=3&_sid=db90a2d79&_ss=r

 

Hope this helps

Thanks. The joys of owning a 47 year old bike are never ending!

I was more wondering I could retain this reflector but retro fit an H4 led Ted

If you mean the part of the shaft where the oil seal sits I'm pretty sure the bearing will come off - just dont heat it and destroy the O ring.

Ill have to dig my vice out from the garage. I didn't think of clamping the bearing. I didn't want to damage it too much but I think that's the only way.

My 500 headlamp is  a standard UK style 7" unit.
It has the three lugs similar to those on the old sealed beam headlights.

I fitted a Land Rover Defender 90 type LED headlamp unit but pretty much any old style 7" headlamp will fit.