So since we got introduced to the 300 model ultras everyone has forgotten about the 250 and 260 but I just got a stock motor and was looking for some mods that I could do any insights planing keep the motor internals stock as much as I can *yeah it's a race ski just thinking about trying something diff so I took out my race motor and starting for. Scratch with as stock motor* so if you all could help by prob give a set up with a stock ski and top speed 8-)8-):p;)