well my dad got back last night from running the new Viper engine. It ran great on the trails but on the lake it would only pull 7500RPMs way short of the desired 8500. 8300-8600 is the max best RPM range on the Viper. So it is time to get into it and see if they rejetted. Stock Jetting is I believe 49.5. Gonna check if they changed the jets around. As my dad said if they did he is gonna be majorly pissed.