因為我的BMW R1150R只有兩缸，而且TWINMAX精度很高(可調靈敏度很高)，因為只比對兩缸，不用懷疑和考慮精度問題，只要雙缸平衡即可，快速的一次操作就搞定BMW R1150R雙缸平衡簡單方便，所以我常用。
其實英國的Carbtune Synconiser是最傳統的物理性結構，精度也非常好，放著當備品(可用在四缸)。
法國的雙缸平衡錶，我最常用TWINMAX The Electronic如下
Twin Max Carb Sync Tool~說明書如圖
http://ascycles.com/detail.aspx?ID=2146
With use, the chain of cables, rods and linkages that connect the throttle to the carburetors will stretch and change their tolerances which results in the carburetor sliders or butterflies operating at slightly different times from one another. This produces an imbalance in the carburetion of the engine due to unequal amounts of air entering the cylinders at any given time. Carburetor balance, or synchronization, is essential for the efficient running and longevity of your engine. Any imbalance in the timing, or amount of, throttle opening amongst the carburetors on your engine will result in reduced performance, poor throttle response, excessive fuel consumption, increased vibration and increased stress on the crankshaft and bearings.
THE ADVANTAGES OF THE TWINMAX BALANCER Other balancers use either dial gauges or tubes containing mercury or spring-loaded weights with one gauge per cylinder and any adjustments to the carburetors are made according to the readings on each of these gauges. This means that not only is there the potential for errors due to the moving parts of each gauge, it is very difficult to ensure that each gauge gives exactly the same reading on a given amount of vacuum, due to variances in manufacturing tolerances, friction differences, volumes of mercury or tension of springs. The TWINMAX is different. The TWINMAX works by comparing the vacuum present on either side of a single pressure sensor and shows this difference as a meter reading. The carburetor being calibrated at that time is then adjusted until there is no deviation on the meter! No potential errors and only one reading to make at any time! Synchronizing carburetors with the TWINMAX is simple, quick and gives professional level accuracy every time! Regular balancing of your carbs with the TWINMAX will ensure your engine performs at its best at all times.
o Use with virtually any machine!
o Suitable for fuel injection systems
o Use with any number of cylinders
o Absolutely accurate
o Electronic-no moving parts
o No mercury or springs or weights
o Unit not position sensitive
o Compact
o Portable
o Easy to use
如下~英國的Carbtune Synconiser是最傳統的結構，精度也非常好。
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