Updated design for 2018! These are now lighter and have built-in hex for easy installation with an adjustable wrench.  Billet aluminum drive coupler set for the Yamaha Super Jet and Wave Blaster. Made from 6061 aluminum and clear anodized for protection against salt water corrosion.  Made in USA!

Uses the Kawasaki style 750/800 rubber damper(not included).

Crank side coupler has 27-1.5mm threads and the mid-shaft side coupler has 24-1.5mm threads.