The Motion Pro SyncPro™ Carb Tuner is a precise four-channel vacuum indicator designed for synchronizing the intake of engines with multiple carburettors or throttle bodies. It is suitable for use with any 2, 3, or 4-cylinder four-stroke motorcycles.!!PLEASE READ THE INSTRUCTIONS CAREFULLY BEFORE USE!!IF YOU ARE UNSURE HOW TO USE THE PRODUCT, PLEASE VISIT YOUTUBE.COM FOR MORE INFORMATION ON HOW TO USE THE PRODUCT. Precise four-channel vacuum indicator designed specifically for intake synchronization of engines with multiple carburettors or throttle bodies (maximum vacuum rating for this tool is 40cm Hg) Mercury-free design For use with any 2, 3, or 4-cylinder four-stroke motorcycles Spill-proof design allows tool to be stored in a horizontal or vertical position Easy-to-read scale for precise synchronization Unaffected by ambient pressure changes Includes hang hook to clip onto the handlebars for easy use Rugged, impact-resistant ABS enclosure with a convenient storage area for adaptors Rubber feet on enclosure bottom help prevent sliding Includes hoses, 5mm adaptors, in-line restrictors, and instructions 5mm adaptors are used on many Honda and Suzuki models Optional 6mm adaptors are available for use on most Yamaha models Most Kawasaki models do not need adaptors Accessories: 08-0168 6mm short adaptors (set of 4) 08-0013 5mm brass adaptors (set of 4) 08-0040 6mm brass adaptors Yamaha (set of 4) 08-0014 replacement hose set 08-0426 Restrictor Jet (set of 4) Included Items: (4) Restriction Plugs (1) Vacuum Hose (1) 6 Port Tee Adaptor (2) Long Brass Adaptor 4 in. Long (2) Brass Adaptor 2 in. Long (1) Hanger Hook (1) Carb Sync Tuner Cross Reference Numbers: 08-0411