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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 111 reviews
      William L H Wright
      Way easier than mechanical gauges

      10 out of 10.arrived well packaged. Very prompt. Bike runs alot smoother. Better idle to.well done.

      Bryan Crabtree
      Handy carburettor balancer

      I found the unit was a lot easier to set up than the traditional nanometers. The scaling was very good, but if your looking for perfection, I’d still go for mercury tubes, but unfortunately mercury is not easy to transport (planes etc.)

      Doug Rutherford
      Why is it not 240volt supplied?

      This is a workshop tool and as such should have a 240volt supply? Im not going to be tuning my bike on the side of the road so battery clamps are not acceptable! Banana plugs at the very least so I can plug it in to a regulated and inverted 240v AC/12V DC supply.

      Hello Doug.

      Thank you for your detailed feedback.

      The reason why our devices run on 12 volt is that the the 12V vehicle battery right there where you are working.

      It is our view that most of our customers prefer simply clipping onto the battery over having to reach for the nearest outlet, use an extension cord, and having to acquire a regulated and inverted 240v AC/12V DC supply, to use our product.

      It is for these same reasons that you typically find other automotive workshop tools such as strobe lights, also running on 12 V.

      We believe that our website clearly specifies the operating voltage and it shows a picture of the alligator clamps on the product page, but we will be taking your comments into account for the next update.

      Again thank for your business and taking the time to provide your feedback!



      Syncroking 6

      I just purchased a SyncroKing 6 had the opportunity to use it today on my Porsche 911 with independent throttle bodies. It worked well and very accurate. The throttle response is so much smoother and I was able to synchronise them perfectly. Thanks for designing and manufacturing this in Australia. Well done.

      Andrew Martin
      SynchroKing Carby/Throttle balancer - Excellent kit

      I was looking for one of these for a while to tune my GRiSO after a throttle body clean, then this one popped up on Insta. Good price and the company has a good rep so gave it a go. I was pleasantly surprised when it arrived so quickly (I failed to realise the business is located in my home city of Perth😁). High quality kit with robust hoses and machined nipple connectors. I had the Guzzi tuned in no time at all. It’s made a noticeable improvement to fuel economy, power and throttle pick up. Very very happy.


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