![Why some tachometers indicate engine rpm in the format of X100, X1000 and some in? Photos and review! Why some tachometers indicate engine rpm in the format of X100, X1000 and some in? Photos and review!](https://automanana.com/wp-content/uploads/2018/12/2cc6995976b6a7fd2b51491228253ca2.jpg)
Why some tachometers indicate engine rpm in the format of X100, X1000 and some in? Photos and review!
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