Very hard to find - for sale is a new Amal dual throttle assembly top clamping screw. This screw measures 1/4" x 26 (CEI) x 7/8" which is designed specifically for "dual" Amal throttle assembly's as used on twin-carb applications from the Bonneville, T120R, Daytona, A65, Lightning, etc... Check your parts book to ensure the best fitment.