Correct headlamp shell holes for MK2?

Jdub · Jan 1, 2019

Did the correct headlamp shell for the 1974 Mk2 and/or Mk2a include one, or three holes at the bottom of the shell for wiring routing? Parts book shows one, several other references show three.

Thanks,
John

marshg246 · Jan 1, 2019

Every original bike I've seen had one. I always use three. I detest the jumble of wiring and connections under the tank so when I wire a Norton, it doesn't exist and most connections are made in the headlight shell. Three holes are easier for this. To see what I mean, look here: http://www.gregmarsh.com/MC/Norton/Norton_1974_Wiring.aspx

Of course, a purist will hate how I do it but I have less connections to fail and no need to remove the tank if one does fail.

C317414 · Jan 1, 2019

My 74 Commando is original and it has a single hole headlight bucket.

Jdub · Jan 2, 2019

Thanks to all for your speedy replies and knowledge! I will retain the 3-hole shell that came with the bike. I thought it was a wrong part, but it has the stamp "Lucas" (not SS700P) on the bottom, front, of the shell. Not original but I have bigger fish to fry on this bike.

Thanks again!

N0rt0nelectr@ · Jan 2, 2019

Jdub said:
Did the correct headlamp shell for the 1974 Mk2 and/or Mk2a include one, or three holes at the bottom of the shell for wiring routing? Parts book shows one, several other references show three.

Thanks,
John

I have both a 74 Mk2 and a Mk2A and both of them have 1 large one in the bottom.
John in Texas

cliffa · Jan 2, 2019

marshg246 said:
Every original bike I've seen had one. I always use three. I detest the jumble of wiring and connections under the tank so when I wire a Norton, it doesn't exist and most connections are made in the headlight shell. Three holes are easier for this. To see what I mean, look here: http://www.gregmarsh.com/MC/Norton/Norton_1974_Wiring.aspx

Of course, a purist will hate how I do it but I have less connections to fail and no need to remove the tank if one does fail.

Hi Greg,
How did you get the grey handlebar switch harnesses so clean?

Somebody on here posted a very handy tip a couple of weeks ago, which is probably a bit late for you. When you are forced to makes a soldered connection ( which is inevitable at times). Before you heat the shrink sleeve, slide a piece of cutoff narrow cable tie long enough to bridge the the joint plus say 10mm. each side, then shrink. That will help protect the joint from the dreaded vibes.

Cheers,

cliffa.

marshg246 · Jan 2, 2019

cliffa said:
Hi Greg,
How did you get the grey handlebar switch harnesses so clean?

It's a lot of work. Clean with WD40. Clean with Isopropanol. Clean with denatured alcohol. Lightly clean with acetone. Repeat. I use cotton cloths and except for the acetone, scrub fairly hard. Getting them decent is maybe 10-15 minutes each. Getting them nearly new more like 20-30 minutes. Sometimes, dish soap and water will remove stains the above don't.

cliffa · Jan 3, 2019

Thanks Greg.

Correct headlamp shell holes for MK2?

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