Messages

IVE HAD DIFFERENT BIKES THAT WERE prone to vibrate and blow bulbs, so led is good there if nothing else.

id unplug the warning lamp, stuff the led back in and call it a day. 

This ;)

I have full LED's in every operational bike I own. No issues whatsoever.

I used a repro RZ/RD350 ignition switch on my DS7. It bolted right up, but as SoCal mentioned, the connector is different. I simply repinned the wires into the old connector.
Like this one...
https://hvccycle.net/yamaha-1978-1988-reproduction-ignition-switch-with-keys-and-fork-lock/

If you're looking for just functional, that should work for you with little modification.