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There's some posts on this already if you use the search function - from memory I think you have to fill all 100% on surf side, 50% non-surf, and try to get a list. Honestly though, even the Yamaha videos show a pretty weak wave. Maybe good for skinny people or kids, but not for regular 'murican's.
I found some once but cant seem to find them again. Thanks. I've tried 100-50-0 and that was okay, but ill try 100-100-0 next. Ya I bought the Yamaha more for a family boat and for the ability to surf when the kids give me a chance. Hopefully ill get some good input I'm 220lbs so I'm probably going to need to buy some additional ballast which I'm okay with if I know its going to work. I'm not much of an experimental guy. lol
Only other suggestion is to make sure you're in 15' of water and to experiment with speed for your wave before you jump in the water.