Yup, more than likely it's just seat of the pants performance but that is fine by me. I just want to bike to be smooth. I was happy with the performance as is. Just the on/off throttle I didn't care for especially coming out of a slow turn and then opening up the throttle jerkiness. If that is fixed than I am a happy camper. Not sure if we will get a review about Ivan's tune since it doesn't exist, yet anyway.