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D14 Earthing point
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December 5, 2018 - 7:26 am
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I'm sure I have seen a mention of this before, but I can't find it by searching the forums. I have a new Lucas wiring loom, but the frame earth ring terminal is far too small to accept the bolt at the rear of the petrol tank. I imagine this is a common problem for others buying this loom. But what's the answer? Obviously putting on a bigger terminal, but I hate the idea of butchering a brand-new loom. Is there another, more suitable, earthing point with a smaller bolt, such as the rear mudguard/rectifier bracket? If I decide to put on a bigger ring terminal, my frame is newly powder coated, so should I strip the coating to bare metal where the terminal touches it? I think I know the answers, but am keen to know what others have done!

Current bikes: 1968 D14/4 Sports, 1974 Triumph T100R Daytona.

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December 5, 2018 - 9:57 am
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the   standard    posativ   earth   system    lets   the  ELETRONS    from   the  batery  leav  the  negertiv   terminal   pass  throw   the  lamp  or  horn  ect  and  mack   ther  way  back  to  the  posativ    termial     ,so   a  twin  earth     ,   wirer & frame ,,  givs  a  beter   pathway     for   electrons so  do  a  good  job  as  you  will  gane   from  it

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December 5, 2018 - 10:51 am
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Any frame fixing point will do. Will the terminal reach down to the battery mounting fixing bolt?

As youhave correctly surmised, powder coating is a reasonably good insulator!

St. Mary's Bay, Kent
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December 5, 2018 - 10:51 am
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Personally, I would remove the small ring terminal and fit a larger one. If you do it properly, its not butchery at all, its just wiring. You must remove powdercoat if you want to make a good earth. Do it carefully and it wont be seen anyway, and if you can see a little of the bare metal once the bolt is tightened up, just touch it in with a little black paint.

Current bikes......1958 D5, a 77 Suzuki GT250 and a 77 Honda CB125S. I have a 74 Kawasaki KH400 and a B175 waiting for restoration. A 1980 Honda CB400N waiting for MOT.  Everyday ride is a 2011 Harley Davidson 883 Sportster. 

east sussex
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December 5, 2018 - 12:36 pm
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I agree .the greater the area of contact the better.a little petroleum jelly will ward off the wet.

67 D10. and a D7    2007 Honda Hornet FA. Suzuki 89  DR 250S, Sinnis SC 125. 78 Honda 90  75 Montesa Cota 247

Mags 1
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December 5, 2018 - 5:57 pm
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Running another piece of thicker wire from central point to to engine mount will also help a lot in cutting down high resistance joints.

Four now on the road and at least several in bits.

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