There is a split because the huge majority of car people really don't understand the reason it exists in the first place. The balance shaft has nothing to do with "balancing" anything. They interpret "balance" as something the engine must have to operate correctly or for longevity. They would be wrong. It exists because we consumers want everything we drive to be smooth and quiet. Motorcycle oems use them in many 1, 2, and 3 cylinder designs and more accurately call them "counter-balancers".....It's either the most cost-effective method of reducing rotating mass, or the worst idea in the history of mankind. Camps appear to be split evenly.
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