Ask MXperts

MXA does run Maxima K2 pre-mix, but we do not run Maxima k2 injector oil as pre-mix—and there is a very good reason
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Slipper clutches are not autos, but auto clutches slip and you can do the same thing with your left hand
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The choice to paint MXA's helmets one color (and one color only) was brainstormed 30 years ago. It was the result of a year-long test to blue, red, green and chrome helmet designs
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I see riders put their right hand over the end of the muffler and blip the throttle, even MXA test riders, why do they do this—it makes no sense.
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Dear MXperts, I hate to admit it, but I got all enthused about Ken Roczen racing a Suzuki RM-Z450 and ran out and bought a leftover 2023 Suzuki RM-Z250. I got a great deal on it ($6000 out the door), and I broke it in by riding it in a…
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Why aren't gas/electric hybrids being looked into for motocross use? And, as a side note, bless your stars that they aren't
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Every hardcore motocross racer hates his fork seals. Of all the things that can go wrong on a motocross bike, fork seals are the most devastating
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Muffler packing is one of the most forgotten maintenance items on your bike
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As rugged as your forks may seem, they do have weak spots that can cause problems
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Over the years, MXA has tested more TM motorcycles than any other magazine or website; however.....
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Forget about emulating Eli Tomac—think of yourself as John Force. Twist the throttle to the stops and leave it on as long as possible, you will go faster
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Sometimes the most recognizable thing about a racer is his helmet. Danny LaPorte had just such a helmet. Do you remember it?
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But, If you “don’t have spark,” there is nothing to light the compressed fuel and air with. Spark is an a major part of the "Fire Triangle."
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Even though there are fuel-injected two-strokes, all the motocross versions require oil to be pre-mixed into the gasoline. When adding gasoline with oil pre-mixed into it, the internal parts of the engine are lubricated as the engine runs.
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It would behoove any KTM, Husqvarna to take the simple step of initializing their ECU any time the weather changes
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Desaxe engines have been around for a long time, even Henry Ford implemented offset cranks on the Ford Flathead V8 in the 1930s. Motocross engines have been adopting offset cranks for the last 15 years.
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If you take the same material used in a 7/8-inch aluminum bar and make a 1-1/8-inch bar, the larger bar will be 2.1 times stiffer and 1.7 times stronger. Why? Because stiffness increases to the third power and strength to the second power…
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If you need strange solution to fix a common problem, the problem is you
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Motocross tires are measured using the Shore Type A durometer scale — The higher the durometer number the harder the rubber compound
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Are the fork and shock clicker settings on one bike transferable to another bike?
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These are the magic numbers…in America
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Peak measures the highest horsepower the engine produces, but often a pipe, piston, cam or mod makes larger gains, compared to the stock engine, at different parts of the powerband
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Someone, somewhere must have pioneered the idea and built a proof-of-concept motocross machine—Who was it?
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The only tool you need to install the poorman’s steering damper is a wrench
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When are motocross bikes going to get fly-by-wire throttles? Let's hope that never happens
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Perfect steering geometry is the correct relationship between the bike’s head angle, weight bias, overall wheelbase, front center (distance from the front axle to the crank center), fork offset and trail
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The Luongo-led MXGP series finds another way to line their pockets on the sweat of the Grand Prix riders
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As a rule of thumb, try not to use threadlock; instead, rely on the proper torque specs from your owner’s manual. If you must use threadlock, use the appropriate grade
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Ken Roczen is responsible for a bump in 2023 Suzuki sales, because Kenny proved that the RM-Z450 was much more competitive than most people thought
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