Consider carb tuner without mercury.

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) adapters and easy to follow instructions.

Includes both 5mm and 6mm Manometer adoptor set.

Disclaimer: We are selling at a deep discount because the plastic reservoir on the steel body may be clouded which is how they came from the factory yet the unit still does the job.