Motoworks

Hello,
A friend of mine have a yfz450r and just bought a motowork full exhaust system and want to know if he need something else like a fmi, lid off, maybe a wire mod like can am, you know things like that, because the quad sometime turn off...

Thank in advanced!!

b u m p

Yeah youll want a fuel programmer otherwise it will be running lean most likely. Stock EFI doesn't have an O2 sensor to compensate for increased airflow.

It's just like not rejetting a carbureted quad after adding aftermarket parts.