4 Precision Gauges: Synchronizing your motorcycle's carburetor is the most common and important job to service your beloved motorcycle, and getting the right vacuum carburetor to do this job is just as important. The synchronous measuring tool consists of four gauges, with a 15.6-inch metal base at the bottom for tabletop use, color-coded scales for easy viewing, and four lockable brass valves.

Durable Frame & Multi-Function: This vacuum carburetor tool features sturdy construction with all hardware is high-grade chrome finish, and it can quickly diagnose improper timing, stuck valves, leaking manifolds, improper fuel mixture, spark misfires, and much more. What's more, the vacuum carburetor can synchronize the values of up to 2-4 carburetors.

Complete Accessories: The set comes with 3 types of adapters for most motorcycle models, and a 4 PCS 30" rubber hose facilitates remote use. The product also provides you with a convenient carrying case equipped with a handle and lock for easy transportation and storage. In short, these combinations can help you troubleshoot equipment quickly.

Easy Operation: When you operate tuning procedure, make sure all gauges are calibrated to zero before using. Firstly, you need to start the engine, let it idle, check the gauges, adjust the dial slightly if the needle is bouncing around, and adjust the screw until the sync is obtained. Secondly, stall the motorcycle, give the throttle a few snap-back and repeat the process until the designer result is achieved.

Wide Applications: This vacuum carburetor synchronizes tool kit includes long and short carburetor adapters for easy access. It is made of high-quality material, with a durable structure and long service life. It is widely used in factories, workshops, garages, and households.

Measurement method:

1. After the engine is fully operational and the correct idle speed is adjusted according to the standard data, turn off the engine.

2. Connect the rubber vacuum tube to the pressure gauge and press on the elastic clamp.

3. Refer to the motorcycle maintenance manual for each model, use the special threaded copper joint, screw into the carburetor thread, the thread is not correct, do not force it in, the threaded joint must be cleaned before the copper joint is screwed in. Also confirm that the copper joint seal is not broken and screwed into place until it is sealed. Insert the other end of the rubber vacuum tube into the tapered end of the copper fitting.

4. Confirm that the pressure gauge rubber vacuum tube is connected to the carburetor cylinder to be measured and check the number of each cylinder.

5. Activate the engine. After warming up for a few minutes, start to adjust the carburetor synchronization. After initial synchronization, refuel (accelerate) several times. After returning to idle speed, check the pressure gauge and adjust it again if there is any change.

6. Refer to the vehicle's factory data sheet for the negative pressure standard data for the motorcycle carburetor.

Precautions:

1. Please operate carefully to prevent water or oil, dust and other dirt from entering the passage of rubber hose.

2. It is strictly forbidden to fall and impact at the height of the instrument to avoid high temperature, high humidity and sunlight.

3. Wipe the meter with a soft cloth. Do not wipe it with gasoline or solvents.