Don’t confuse the air screw on a two-stroke carburetor with the fuel screw on a four-stroke carb. They are completely different, not only in function but in location Read More...
First and foremost, fuel injection on four-stroke motocross bikes is a fait accompli . No one is fighting it. It's a done deal. The Yamaha YZ250F was the last holdout and they quit holding out this year. There is no going back to the… Read More...
Dear MXA, I bought my kid a 2007 Honda CRF150 from my brother-in-law. The bike is totally stock and never been race (only ridden around the family farm). Unfortunately, my kid wants to race, but the bike pops and bangs so… Read More...
Dear MXA, Just wondered if you could hook me up with the best jetting specs for a 2007 CR250? I hate the way my CR250 two-stroke runs. The jetting on the 2007 Honda CR250 was a mystery to everyone who… Read More...
We can't tell you how to jet your bike. It's a big world out there (and we don't know you all that well). However, we can tell you what jetting we run in the MXA test fleet. Take into account that we race in a Mediterranean climate, near… Read More...
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