I have a 97 spx ski with the 787, the engine is brand new from sbt, i have a few minor mods on my boat( intake grate, prop, jetted carbs, and trim tabs) But my exaust valves dont feel like they are opening up, its like im topped out then i just get a powerband, but i know its the valves, there is a lil oil spitting out around the ring but not real bad. Any tips are greatly appreciated im only 16 and new to the scene so thanks a lot.