Hi

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.

Mods:

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