I have installed the Malossi 190 kit and exhaust on my 2016 Sprint. The DB killer is installed.
The Forcemaster is set according to the installation instructions, and the scooter will often (if not always) backfire lightly when decelerating. It also smells surprisingly like my 2-stroke Lambretta. It's not smoking or using oil, so I assume it's just the exhaust emissions.
Is there an optional catalytic converter that I am missing? I was under the impression that the exhaust is homologated with the DB killer installed, and the stock exhaust does have a catalyzer, correct? I don't remember the scooter being objectionably smelly before installing the cylinder kit and exhaust (both were done simultaneously).
Just curious if there is something I can do to address both the backfiring and the odor issues. Thanks!