OBR does not have a magical coating they just use the coated Zenoah parts. The case is definitely not coated as it is billet and cut by Turtle racing. I race with Dan and he built my 32cc SS motor. It is amazing! I run the
990 carb on mine, and I do race on a track. The piston port motors tend to like the 1107 a tad bit more but either carb will do fine. The pipe is every bit as important as the motor. Top end goes to victory, Bart is a good bottom end pipe but falls off and Olimat is the mid range pipe that never seems to stop pulling as the revs go up.