This mercury carburetor synchronizer tuner (carb synch tuner or manometer) will synchronize up to 4 carburetors at a time.
It has a sheet steel body with clear markings incremented every 2cm from 2 to 54 for simple accurate tuning and includes vial of mercury, hose, line restrictors, 5mm (for Honda, Kawasaki and Suzuki motorcycles) and 6mm (for Yamaha and many European motorcycles) adaptors and easy to follow instructions. By Barracuda®.
Maintenance schedule: Honda recommends checking your carburetor idle speed every 4000 miles and your carburetor choke every 8000 miles. Synchronize your carburetors every 8000 miles or 12800 km.