I will be honast i have no exprence running ninja engines but i agree with you every manufacture is difrent. I would never run a novarossi engine in like i use to do with a sirio. Sirio engines did not cope well with a long brake-in probaly because of the difrent materials used in the piston itself. Novarossi is difrent agen. From what i see with the ninja people constantly over tune the engine to try to get bottom end power. Were as from my view they should look at gearing and clutch rather then leaning hard on an engine trying to find somthing that will never come with out the clutch and gearing suiteing the engines powerband. I made my orignal post because i know ryan and have seen the engine run. Best Regards Jeremy.