Unless you want only scale speed, you will need more than a stock Zenoah G260 to push that z-drive. I just finished building a 55" Manta Ray running a z-drive and powered by a Quickdraw 35! Check out the photos of my boat.
[link=http://pg.photos.yahoo.com/ph/gary_wormald/album?.dir=d759&.src=ph&store=&prodid=&.done=http%3a//photos.yahoo.com/ph//my_photos]Manta Ray with a z-drive[/link]
The z-drive takes a lot of power to turn it at any real speed. Also, don't buy the Bonzi quiet pipe. You will not get the performance you need. Get a Hanson, M&D, CC Racing or some other good pipe. You won't regret it.
