I invested in a Vape ignition (formerly Powedynamo) system for my 1973 CT3..... I ordered it directly from the company in Czech Republic, but there are some vendors in the US that sell the system.

I paid $421, including shipping (February of 2023).

Czech republic

https://www.vape.eu/yamaha

The system is fantastic in the bike and well worth the investment..... The bike runs better, starts easier, gives the abilty to run 12 volt LED lights (safer IMO) and has no points to mess with.

I will try and post pics of how I installed the system (alot of thanks goes to Mark T) including pics of Vape's installation manual (which is very poor)

Also will include pics of the bike with LED lights, which has been an incredible difference.