ALPHA MOTO Universal Motorcycle Vacuum Carburetor Synchronizer Synchronization Carb Sync Gauge Honda Yamaha Kawasaki Suzuki CB GS KZ XS 550 650 750 850 900 Video Demo

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  • Regular price $63.98

This kit comes with both 5mm and 6mm adapters, will work with all bike models includes Yamaha which requires 6mm adapters (Honda and Suzuki use 5mm adapters, Kawasaki does not need adapters).

It comes with a mold case for easy storage.

This vacuum gauge set features 4 precision gauges. 
Gauge reading: 0-38hg 

Each gauge has its own individual damping control and Calibration Control

Gauges are mounted to a heavy metal base intended for bench top use. 

Dial Diameter: 2-3/4"

Parts included in the Kit:


Bracket x 1PC (304x102x20mm)
2-3/4" Gauge x 4pc, brass fitting:5.5mm
4(ID)x7 (OD)x75CM Rubberhose x4
5.5mm (OD) Valve x 4pc
102mm(M6x1.0) Extension x 2pc
52mm(M6x1.0) Extension x 2pc
52mm(M5x0.8) Extension x 2pc
28mm(M5x0.8) Extension x 2pc

Please refer to following video demonstration for setup and tuning process: 

Sometimes, during transportation, the gauge might be out of sync when you receive it, calibration is easy:

Before each use, make sure all the gauges are calibrated to 0, if the needle on the gauge is not pointed at 0, go to step 2:
open the plastic cap, and use a flat head screwdriver to rotate the screw (circle in red in the picture) on the gauge face to adjust the pointer to 0 or the position desired.
Synchronization procedure:

1. Position the gauge properly.

2. Set up the gauge:

a) cut the rubber hoses in two pieces, and connect the hoses with white plastic valves, attach the rubber hoses with the gauge.

b) Remove the vacuum attachment plug-screws from the carburetor flanges or intake manifolds and install the brass adapters in these holes ( long adapters to inside carbs and short adapters to the outside carbs).

(Run the engine until operating temperature is reached, carburetors must be adjusted with engine warm and the choke fully open.)

 3.Tuning Procedure
 a) Start the engine, let it idle and check the gauges.

 b) If the needles are bounced all over the place, adjust the valves slightly, the needles will flutter, but should not oscillate more than one graduation on the gauge faces.

 c) If one gauge is out of sync, adjust the adjusting screw between carbs until the sync is obtained.

 d) Shut off the bike, give the throttle a few snap-backs,let the bike settles in the new setup, and repeat the process until desired result is achieved.