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just search our website for the diagram numbers
90119-A0464
Weights are placed on the arms on both sides of the crankpin to increase the balance ratio of the counterweight against the inertia of the piston up-and-down motion and crankpin rotational inertia
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STM McLaren Crank Wrench (STM-MCL-CW) Engine Cover just search our website forThe STM McLaren Crank Wrench was developed in a pinch. While installing an aftermarket crank bolt on a 570S we needed something other than the factory crank lock key to hold the crank steady while bringing the torque to 400 FT LBS. This was our answer, and now you can have one in your tool box too! We recommend starting with the factory crank lock key and running the torque on your aftermarket main bolt to 165 FT LBS. Then, remove it and use the STM
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