I've been trying to figure it out for a while now... Got any closer pics that show it in detail?
I see you have a fancy gear shift lever with the bolt that screws in from the bottom and doesn't go through the cut out in the shaft (I have the same one)... Whoever designed that piece of brilliance should be beaten with a phone book
It may just be the photo, but it looks like your hydro clutch doesn't have a straight pull to the arm. Probably need to sort it out if that's the case as it will likely improve the feel/pull
Besides the little things I'm being picky with it's a very sweet bike
Did you had the quad on a dyno or was this more "seat of your pants" measurement? Or, are they supposed to help with more responsive power delivery?
If it's the latter, the better solution is to lower your gearing, change gears more often, and keep it on the noise! If all else fails, ride it like a 2 stroke!