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bisi valve springs booo

  1. Bisimoto springs are too much stiff for stock valves.

    Engine Building
    I drive since 10 000km bisimoto stage 2 cam with bisimoto springs. I took a look on the the valve adjustement twice, and each time intake side clearance become closer of .001-.002 including the cam break-in. This complete head have only 60 000km done on it, 45 000 on stock engine and daily...
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