Originally Posted by aaron joy

This is normal, I don't believe you will find two fuels that run the same. For example whenever I sell a customer Byron Gen 2 ( switching over from another brand of fuel) I let them know not to be scared when you start your engine it may be on the rich side. I even help them with the transition if they want me to.

He is a new video on Neobuggy on tuning your NR engine that you can apply to your RB engine.
http://vimeo.com/7595905