Permanently splicing wires in a harness

[Vracktal]

Finally traced what I think is the source of my bike's poor running: in the loom the four white wires pictured below were barely hanging together and peeling the electrical tape back revealed they were only held together by being twisted.

https://i.imgur.com/s0j5B7D.jpg

So I know the problem now, but does anyone know the best way I can permanently splice these three wires together with the fourth? The other wires are held together with some kind of copper clip, almost like a staple but I can't find anything on how to make that kind of join...?
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2007 BMW R1200R: On road
2009 BMW G650X Challenge: On road
1975 Norton Commando 850: Off road, awaiting recommissioning

[J4mes]

solder and heat shrink them

[J.M.]

But practise soldering first. Otherwise they'll fail at some point and leave you stranfed If you don't do a good job.
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2004 R1 & 2018 XSR900

[Kickstart]

Hi

As above.

The copper clip sounds suspiciously like a scotch lock.

Those wires look far heavier grade than normally found on a bike beyond the main power feed from the battery and the wire to the starter motor. I would guess someone has already been at the loom more than you think. Strip back a bit more and find where the white wires are hacked in to the loom.

All the best

Katy
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Vracktal]

[Raffles]

How about using something like this covered with heatshrink tubing?
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A good loser will always be a loser.

[Vincent]

Google "Push In Wire Connectors"...you'll need to seal the top up, I use hot glue but candle wax will probably do at a push, or Superglue maybe?
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Space Is Deep

[hmmmnz]

what you have is a factory crimp,
most bikes have them in the loom,
the general industry practice is to use them instead of solder because
solder "can" crack with movement (although ive never had it happen)

the bit you are after is called a splice crimp

myself, id solder them together in a line, and slide raychem over and shrink down
(raychem is heatshrink with a glue inside to water proof everything)
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the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[Robby]

I have come across things a bit like brass staples in factory wiring looms, normally on the earth wires where you may have 3 wires joining on to one.

In your case, solder and heat shrink. Make sure you're soldering on to bright, clean metal. If the copper has oxidised and gone black, solder won't stick to it.

As Kickstart alluded to, those white wires may not be original so it is worth seeing where they join onto the loom. You may find another twist and tape job. I once did a similar job on an NTV loom, ended up finding 16 scotchlock connectors scattered around the loom.