classic motorcycle forum
Motorcycle Discussions => British Bikes => Topic started by: ramwing7 on October 01, 2026, 09:22:57 PM
-
Does anyone know the stud size for the carburetor studs on a 1932 Coventry Eagle Silent Supreme with the proprietary Coventry engine?
Mine are in pretty nasty shape.
I've tried to replace with a 1/4" x 26 tpi BSC on one end and 1/4" x 20 tpi on the other and that's a no go.
This thing is going to be a bear to revive. :o
-
You don't have the old studs to work off ?
A thread gauge is near indispensable for this.
What happens when you try these sizes ?
They nearly have to be bsw or bsc in 1/4".
Some marques (in the 1920s) were famous for 'developing' their own sizes.
Douglas for example used some 27 tpi.
But that was more the 1920s.
-
Nope, but I have one ordered.