If you ride a two-stroke long enough, there’s a moment where your bike starts acting like it’s got a personality disorder. It won’t idle. It bogs when you crack the throttle. It feels flat when it should be ripping your arms off. And deep down, you already know the answer: the carb needs cleaning. Again. On my son’s 2020 YZ125, this has become a familiar ritual. Not because the bike is unreliable, Yamaha two-strokes are absolute tanks, but because carbs are sensitive little things. A bit of dirt, old fuel, or a speck of grime in a jet and suddenly your crisp two-stroke feels like it’s having an identity crisis. Why the Carb Gets Dirty (Even When You Swear You Take Care of It) You can do everything “right” and still end up with a gummed-up carb: Fuel going stale if the bike sits for even a few weeks Tiny […]


