38 Motorsports G5 YFZ450R/YFZ450X oil blow by breather box for 2009 and newer fuel injected YFZ.
WORKS WITH LARGE FUEL TANKS AND/OR LARGE RADIATORS.
Replaces your stock box that leaks and/or doesn't work well, or the ltr or aftermarket breathers that are just in the way. As with everything I offer they get tested extensively. These boxes were in testing for nearly two years. I have yet to blow out one drop of oil, or have any pressure related issues. These things work! As shown in the photos it mounts below the dash panel, tucked out of the way. They are lightweight, hidden, and small. You can install it and forget it, knowing that it will keep the oil in your engine where it belongs.
2014 AND NEWER MODELS SHOULD HAVE THE AIS BLOCKED OFF FOR EASY INSTALLATION. Please see our AIS block off kit listing.
G5 is the 5th tested version of our breather box. We are always looking to improve our products! Gen 5 is lighter, smaller, and more advanced than our previous model that was available for sale, the Gen 2.