With that motor build? Definately don't want to run stock valves with that build and risk a potential issue. Also running a wider real axle with stock width front end will lead to front end push in the corners. My vote; valves.
A forum community dedicated to all Suzuki ATV owners and enthusiasts. Come join the discussion about performance, modifications, repairs, troubleshooting, maintenance, and more! Open to all models including the ltz 400, raptor 660, eiger 400, ltz 250, and raptor 350.