Assembling a Yamaha 62t big bore 701 with an ADA head same as 6m6 650, 61x 701 , 62t 701 or 64x 760 23 March 2020 In this video I go through all the steps of assembling a Yamaha 62T big bore engine with 85mm Wossner pistons with an Ada Girdled head. This video will work with Yamaha 6m6 650 , 61x 701, 62t 701 or 64x 760 engines as they all assemble the same. Comments There are no comments yet. Leave message Your rating: Your review: Share Tweet