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SynchroKing - Carburetor & Throttle Body Balancer
SynchroKing - Carburetor & Throttle Body Balancer
SynchroKing - Carburetor & Throttle Body Balancer
SynchroKing - Carburetor & Throttle Body Balancer
SynchroKing - Carburetor & Throttle Body Balancer
SynchroKing - Carburetor & Throttle Body Balancer
SynchroKing - Carburetor & Throttle Body Balancer
SynchroKing - Carburetor & Throttle Body Balancer

SynchroKing - Carburetor & Throttle Body Balancer

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The SynchroKing is a universal vacuum synchronization/balancing tool for both carburetors and throttle valve bodies. It is suitable for any combustion engine with between two and eight throttle bodies from cars, motorcycles, mopeds, scooters, carts, mowers and outboard engines. It is designed to provide a compact, easy to use and economical synchronization tool for home and workshop use. This carburetor synchronizer comes with 2 - 8 sets of 2 M5 and M6 port adapters each, enabling easy connection to the vacuum test ports on most vehicles.


It is crucial that all throttle valves move in unison for the engine to perform at peak efficiency. Ever felt hesitation when opening the throttle, particularly at small throttle valve angles? Chances are your vehicle would benefit from having its throttle valves balanced.  


SynchroKing balancers are fitted with auto calibration which makes sure that all channels measure from the same reference pressure. No more dealing with conventional gauges that read a 'little high or low'.

A resolution of just 1mmHg is more accurate than any standard gauge or mercury column can offer. The numerical displays offer an exact live readout of the measurement, whilst the bar graphs provide and at-a-glace view of which channels deviate from the average reading. This feature gives an immediate indication of adjustments being made analogous to a conventional mercury column

Configure the device to suit any vehicle and preferences in seconds. Electronic dampening enables live and repeatable adjustment of the dampening setting applied to all channels simultaneously at the press of a button. This completely eliminates the need to use cut-to-length bungs or the manipulation of choke valves for each individual channel.   


SynchroKing balancers have no moving parts (such a bourdon tubes in conventional gauges) that are subject to wear and deformation under repeated load.

Unlike mercury columns, SynchroKing balancers are completely insensitive to device orientation such as a sloped surface that could throw off a mercury column. There is also no concern about the toxicity of mercury compounds around your workshop.

Each unit is 100% tested for function and  accuracy before dispatch.    


SynchroKing balancers automatically detect any channels that are not used. The device will ignore unconnected channels and will operated with whatever number of channels that are in use without any loss of accuracy or functionality. For example, a 4-channel device will work on a V twin with two carburetors, whereas an 8-channel device will work on engines with 4 throttle valves. 

This feature greatly expands the application range of the device and gives many options across different vehicles, which is of particular interest for professional workshops. 

The SynchroKing is available in 2(*), 4, 6 and 8 channels. Please select the model that suits your needs.

Balancing of carburetor and throttle valves made easy.

Key Features:

  1. 100% Australian designed and manufactured.
  2. Competitive priced, top-tier performance. 
  3. Each unit is 100% function tested before dispatch.
  4. Numerical and bar graph display.
  5. 1mmHg resolution.
  6. Digital dampening - No more bouncy needles.
  7. Auto and manual calibration.
  8. Push buttons for repeatable dampening control.
  9. No battery required.
  10. 1-year limited warranty and support for the original Purchaser.

Included in the kit:

    • Selected SynchroKing device, inc. integrated power lead.
    • 2 - 8 x vacuum hoses, dependent on selected device.
    • 2 - 8 x M5 brass port adapters, dependent on selected device.
    • 2 - 8 x M6 brass port adapters, dependent on selected device.
    • Detailed and illustrated user manual.

    For more technical information feel free to download the instruction manual from the product page.

    Download Specifications and Manuals

    SynchroKing 2MkII

    SynchroKing 4MkII

    SynchroKing 6

    SynchroKing 8

      Customer Reviews

      Based on 95 reviews
      Rod Hume

      I used it the same day it arrived. Very easy to use.

      Warren Eaton
      How to kill 2 birds with 1 stone.

      My dads love of bikes put me on to this Aussie made gem to sync the carbs on my 1992 BMW R100RT and in no time we had the 'ol girl purring like a kitten. She went from using 14km/L - 18km/L and the 'clutch rattle' has mysteriously disappeared too. Defiantly value for money and a great learning tool of why one problem may cause another.

      Steve (UK)
      SynchroKing 6

      It was easy to power up using the bike's battery. If there is no vacuum on any one of the input pipes, the display is not used in the calculations. I liked, therefore, how it can be used for less than 6 cylinders.
      Range can be adjusted along with damping, or not, for obvious reasons.
      I am impressed with the accuracy and easy to see readings.
      As gauges are spaced wider apart, it is more difficult to compare the readings. With this unit, the display of all six vacuum readings is within about 150mm, it is so easy to compare readings. It also shows the readings in digital format and has the bar graphs to compare differences.
      It's the easiest setup of carbs I have ever done, I personally highly recommend it.

      Chun Tong
      Works like a charm!

      Very easy to use and accurate. Should've bought this a long time ago! Definitely worth it

      David Glover
      Easiest bit of Kit, brilliant

      Had used cheap gauges and never really nailed it, finally purchased one and went and did 3 bikes in the space of 30-40 seconds each, and all now are purring!.. don't know why i took so long, but it certainly did the job , and Aussie made!,,thanking you !


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