I recall the butons being called primers and were on many European bikes.
When I looked up a carburetor that I was familiar with 50 years ago I found that it is still produced and they called the button a :tickler" as @insighful mentioned.
I recall the butons being called primers and were on many European bikes.
When I looked up a carburetor that I was familiar with 50 years ago I found that it is still produced and they called the button a :tickler" as @insighful mentioned.