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    Hilborn #57 Rotator Spool SMALL ENGINES

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      Purchase Hilborn #57 Rotator Spool SMALL ENGINES

      SKU: AD-BV57
      Hilborn #57 Rotator Spool Small Engines , gas, methanol, under 150 cu in generally



      Factory Hilborn rotator spool

      This fits all Hilborn barrel (metering) valves

      #57 spool

      For small engines like 1 cylinder and motorcycles - Alky or Gas ok. ( not for Big Harley engines -  use a #54 for alky or #56 for blown alky )

      .100" wide ramp


      These rotors are for the standard Hilborn metering valve. O-ring included. Choose from:
      A - #57 Small motor on GAS 40-100 cu in  or methanol for 1 cyl engines
      B - #54 Medium to large motor GAS or ALCOHOL
      C - #56 Medium to large motor, moderate to high percentages of NITRO. Slot width:
      A = .100"
      B = .187"
      C = .312"

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