Tuning and Fixing Your 2009 YZ450F Carburetor

Getting the 2009 yz450f carburetor dialed in is a bit of a rite of passage for anyone who still loves the raw feel of a carbureted four-stroke. This bike was actually a pretty big deal back in the day—it was the last year Yamaha stuck with the Keihin FCR-MX 37mm before they made the leap to fuel injection in 2010. Because of that, the '09 sits in a weirdly nostalgic sweet spot. It's got that classic hit, but it also comes with all the quirks and headaches that fuel-mixing brass can offer. ...

May 2, 2026 · 7 min · Tristram Spelman