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Propulsion Specialties for over 25 Years


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HKS parts UPDATE - Mar 16 2014
Green Sky Adventures, Inc. has received remaining HKS replacement parts inventory on consignment from APSU, LLC. Please click HERE for listing
Feb 7 2014 - Production Discontinuance of HKS Aircraft Engines
Green Sky Adventures, Inc. has received from HKS Engine Distributor APSU, LLC, copy of a letter to APSU, LLC from HKS Japan. Unfortunately, this letter informs of the “Discontinuance of HKS Aircraft Engine Production” and termination of distribution relationships. Relevant exerts from that letter HERE 
HKS 700T
HKS 700E

HKS and Rotax Technical Services
Builder Assistance for Experimental Aircraft