Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
Before selling a siren lever assembly (MG# 13606840) for my Dad, I took some measurements and photos of it. The siren lever assembly is comprised of the following parts:
Lever, siren (MG# 43605640)
Chrome plated steel. Marked with CiTe, a brand name, I believe.
Fulcrum, siren lever (MG# 40603700)
Cast of bronze or brass. Sized to fit 22 mm handlebars. Marked with CiTe, a brand name, I believe.
Screw, lever to fulcrum (MG# 45604900)
A steel shoulder screw with the following dimensions: 6 mm × 1 mm × 20 mm (includes a 10 mm shoulder)
Washer, lever screw (MG# 45605000)
A steel spring locking washer with the following dimensions: 6 mm
Nut, lever screw (MG# 45605100)
A steel nut with the following dimensions: 6 mm × 1 mm
Screw, fulcrum to handlebar (MG# 45606300)
A fully threaded, slotted, cheese head machine screw with the following dimensions: 5 mm × 0.8 mm × 25 mm
Bushing, fulcrum to handlebar screw (MG# 45605300)
A steel tube with the following dimensions: 5 mm inside diameter, 9 mm outside diameter, 10 mm length
My photos don't show it very well, but the screw pulls this tube into the handlebar, thus locking the lever in place and preventing it from rotating. You'll note in some photos that you can see a hole on the inside of the lever...this tube extends into that area.