Rick:
https://www.ebay.co.uk/itm/40-Set-Motorcycle-Car-Electrical-2-8mm-2-3-4-6-Pin-Wire-Auto-Connectors-Terminal/272967577631?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649. They're in Shanghai, so I suspect a hunt on ebay.au or AliExpress will turn them up.
Everything that needs to be said about crimps has been said above
, so I'm just going to add a few comments about connectors.
I use Molex '93-thou series' connectors in 2, 3, 4, 6, 9, 12 and 15-way. These are the round-pin OEM fitment to most Japanese and European bikes from the mid-Eighties through to somewhen about now. For bullet connectors when needed, I use Japanese bullet connectors
http://www.vehicle-wiring-products.eu/section.php/175/1/japanese-motorcycle-bullet-socket-connectorsFor wiring, I use thinwall cable
http://www.vehicle-wiring-products.eu/section.php/198/1/single-core-pvc-thin-wall-cableFor harness/loom covering I use PVC tubing - I hate tape of any type. The downside is that it takes very careful planning to run wires through the tubing to where you need them, particularly when a number of wires go off in different directions. Any soldered wiring joints I cover with heatshrink tubing.
[Edit] See post 20 here:
https://www.k100-forum.com/t10428-comberjohn-s-ghostI'm also seeing a lot more bikes equipped with 'Superseal' waterproof connectors; very expensive and very effective. I use these when building new looms for a UK sidecar company.
I
never use pre-insulated connectors of any type.
As for those yellow, red and blue pre-insulated
-things-; damn devil's spawn is what they are
Point-Seven-Five: Using marine-grade (tinned) wire on a bike is complete and utter overkill and quality does depend on your tools as well as your materials.