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  1. Superpacman13

    Titanium Retainers

    We have produced a set of titanium valve retainers for RC390's, you may ask why we would do such a thing? We have found that with extended high RPM usage the stock valve retainers will fail. The angles between the collets and the retainers do not match well enough for them to hold they valve...
  2. M

    390 Quick Turn Throttles

    Long before we carried these, we used them on all our own bikes. These extremely high quality tubes ride on delrin bushings for a super smooth feel and increased throttle response with their quicker ratio cam. Removal end caps. $80 MNNTHBX - Enter
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