Just got my rxp 06 ready to start up today after a SC rebuilt, removal of bov and free flow exhoust. But When I start the ski it is running fine and normal but when I spin 3000 rpm and more it is running very rough ? When you sit on the seat it sounds like it has a big boostleak but it is deffentley not a boost leat. The sound is very diffecult to describe.

Is it normal to hear a big diffrent when you remove a bov ?

Tried to install the bov again and it was immediatly running much more smooth.


Riva valvetrain
Rotax racing ecu 8300 limiter
Rotax racing Art.4241 127mm sc wheel
free flow exhoust
external intercooler
4'' filter system
worx grate