1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

LED Headlight = One happy Commando

Discussion in 'Norton Commando Motorcycles (Classic)' started by Stillreel, Jun 9, 2018.

  1. Stillreel


    Sep 30, 2011
    Last edited: Jun 9, 2018
  2. pommie john

    pommie john

    Nov 18, 2005
    Most of the LED headlight bulbs I've seen have a cooling fan on the. Does this one not need one?

    Will you be able to reverse the polarity on both beams?
  3. Beach

    Beach VIP MEMBER

    Aug 27, 2013
    There is no way to reverse polarity, having tried this myself, the best you can do is 1 beam. There are several on Ebay that are not polarity sensitive and will work on both beams. Will try to find them and post a link.
  4. kommando


    May 7, 2005
    There are 4A rectifiers on eBay, any orientation in and marked +ve -ve out, for 2 filiment bulb you need 2, will post a link when off the mobile.

    here it is


    This DC DC Voltage polarity exchange circuit can auto supply correct +ve and -ve voltage when the batteries are connected in any orientation.
    It will automatically switch to +ve and -ve.
    It is good to protect charging or other modules. In charging modules, where reverse polarity will damage it, this PCB can 100% sure to supply correct polarity -ve/+ve. No need to care the batteries are connected wrongly.
    Last edited: Jun 10, 2018
    pommie john likes this.
  5. RAWellman


    Jun 8, 2018
    I bought an LED dual beam headlight, of course + ground, from Classic British Spares in California. I'm very pleased with it's performance, fits without modification into the original OEM Lucas socket without any need for a cooling fan. It does have what appears to be an aluminum heat sink. Also have fitted my '74 Commando Roadster with LED turn and combination Tail/Brake light, also pleased with them. A bit pricey but don't own any Vintage Brit Bike if you can't deal with that.
    ntst8 likes this.
  6. Onder


    May 11, 2010

    "A bit pricey but don't own any Vintage Brit Bike if you can't deal with that."
  7. Stillreel


    Sep 30, 2011
    FYI: The voltage change using the traditional Tungsten bulb dropped from 12.4 to 11.3V when switched on. The LED resulted in 12.4 to 12.3V. And again, the bulb bought on Amazon was $10 including shipping.
    pommie john likes this.
  8. Nater_Potater

    Nater_Potater VIP MEMBER

    Apr 7, 2013
  9. vidar hjelm johansen

    vidar hjelm johansen

    Aug 5, 2010
    I've tried such a thing. I did not like it.
    That because high and low were not high and low but more or less
  10. Peter R

    Peter R

    Dec 13, 2010
  11. auldblue

    auldblue VIP MEMBER

    Nov 20, 2012

    I've got three different styles, the best is the new one from classic Dynamo repairs.
  12. Tornado

    Tornado VIP MEMBER

    Dec 5, 2017
    Anyway to get these led H4 type fittings to work in my British Pre Focus BPF type reflector? I have just ordered an LED hi/lo BPF bulb from Dynamo in UK...but this is just the bulb, no voltage regulator or cooling fins, etc, so likely not nearly as high output as above.