Bolt-on, universal collar-and-plate adapter fits all experimental aircraft type gearboxes, for use on the Yamaha Genesis 4-cylinder (YG4) engines from Yamaha snowmobiles, model years: RX1 2003-2005; Apex 2006-2018; Phazer 2007-2018. All hardware, gaskets, oil seals and instructions included.  No additional modifications required.  Choose type of engine and gearbox from the options listed.  
 
Prices and special sales offerings are subject to change without notice.