You need to use the left 2-speed shifter, and modify it as indicated by the original author of this a post. I however have had better luck using any type of thumb lever friction front derailleur shifter. You really don’t need to index shift three cogs, plus friction shifting allows you to “trim” or adjust the shift so the chain rides on the center of the cog quietly.
You need to use the left 2-speed shifter, and modify it as indicated by the original author of this a post. I however have had better luck using any type of thumb lever friction front derailleur shifter. You really don’t need to index shift three cogs, plus friction shifting allows you to “trim” or adjust the shift so the chain rides on the center of the cog quietly.