SX/SXi/SXi Pro motor drinks water, any ideas?

[JHD]

I thought you couldn't run a factory air box with A.M. pipes

 

[BruceSki]

A lot of people run them. It depends on your popoff pressure and how you jet.

The factory airbox has more restriction and needs a higher popoff pressure than open style flame arrestors to run correctly.

 

[JHD]

I had no idea it had to do with popoff. I thought it was a clearance issue with the pipe.
Thanks