Wiring harness help, FC 350

Couple issues in that picture. I would suggest cleaning up the routing and making sure that everything has enough relief - especially when the bars are turned full lock in either direction. Here's some links that will help.

https://www.vitalmx.com/forums/tech-helprace-shop/ktm-wire-harnessstart-button-connector-behind-front-number-plate

https://www.keeferinctesting.com/2021-11-19-ktm-450250-sx-f-electrical-problem-tip/#:~:text=Here%20are%20some%20potential%20problems%20with%20the,when%20turning%20the%20bars%20to%20the%20right**

https://www.ktmshop.se/documents/9ff201fc65ded721d4cd0bcf7ba40af9.pdf

I'm pretty sure those are MOLEX 1490 (5.03mm pitch connectors that are available from almost any electronics supply house).
Get the part numbers and search for what you need using something like octopart.com

Digikey, mouser, RS-Online, and many more suppliers have pins, sockets, housings, crimpers, etc.

Pins & Sockets:
https://us.rs-online.com/product/molex-incorporated/02-09-1119/70190617/
https://us.rs-online.com/product/molex-incorporated/02-09-2103/70190682/

https://us.rs-online.com/product/molex-incorporated/02-09-1104/70190739/
https://us.rs-online.com/product/molex-incorporated/02-09-2118/70190616/

Housings:
https://us.rs-online.com/connectors/rectangular-connectors/soft-shell-connectors/?refinements=%7B%22series%22%3A%5B%7B%22value%22%3A%221490+Series%22%2C%22label%22%3A%221490+Series%22%7D%5D%7D
 

ditch the molex connector they have no business on a dirtbike, they all corrode after awhile. wire it direct.

This. Cut and soldier with heat shrink. Follow the wires, eliminate the connector.