mxa tech spec

Power valves are utilized to open and close a two-stroke cylinder’s exhaust port as needed when the engine’s rpm changes
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Twice is nice, but there's nothing like a twingle when it comes to throwing roost
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You may want to turn, but unless you effectively counter Newton’s law, you are going to go straight. Even worse, if you get the bike turned halfway but without enough conviction, it will high-side.
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Motocross knowledge is learned the hard way or it is passed down from those who know to those who don't
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There is nothing worse than a flat tire at a race. Here are seven ways to end flat-tire phobia
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What motivates a rider to choose the bike he’s on? Obviously, it was a universal belief that one bike was better than the rest
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Can you live without knowing that motocross bikes have head angles that range from 27.5 to 26.0 degrees? Yes, you can
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Without any flywheel weight, you couldn’t ride your bike. It would have a very short powerband, no thrust and a lot of rev.
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Don’t try to live with a bike that exhibits head-shake. It is dangerous, but it is fixable. Here are the basic head-shake causes and fixes.
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Need a quick explanation? They are like flippers on a pinball machine
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KTM's damped diaphragm clutch has been co-opted in varying degrees by Kawasaki and Yamaha—who's next?
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Words to live by: Forks that are too soft feel stiff, when in reality they need to be stiffer to feel softer
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If you take the same material with the same wall thickness and manufacture a larger-diameter tube out of it, its strength and stiffness will grow exponentially with the increase in diameter size
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Heat is more than a byproduct of horsepower; it is the product! The more heat is generated, the more power is produced, but this same heat is attracted to the working parts in a negative way
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Only a handful of companies produce brake fluid in the USA (no matter whose name is on the can, the brake fluid most likely comes from Dupont, Dow or Union Carbide)
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With the return to coil-spring forks, it’s time for some of the old fork-tuning tricks to resurface
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The majority of fork-seal leaks are not caused by design flaws in the fork seals; they are caused, inadvertently, by the fork tube’s chrome plating
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It should be noted that the 2022 Honda CRF450 is the 2021 Honda CRF450, but it will get updated maps and new suspension valving
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Perhaps the slowest product roll-out ever. It was on the Factory Edition, but where is it now?
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Overheating can be caused by a faulty impeller, coolant blockage, old coolant, lean jetting, tblown head gasket or bad radiator cap — virtually anything that impedes coolant flow
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Oversteer is when the front wheel turns in sharply, but the rear wheel refuses to follow the same arc. The 2021 CRF450’s best trait is how accurate it is at turn-in. Every MXA test rider loved the 2021 CRF450 on corner entrance
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BNG is the kiss of death, but let's take a close look at the 2021 Yamaha YZ450F and see if that kiss is actually fatal
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How to fix the 2020-2021 Yamaha YZ450F with a few common sense moves and crack 60 horsepower with something out-of-the-box
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It was an Edison light-bulb moment back in 2006 when Kayaba switched the YZ250 forks from 70-percent position-sensitive damping to 90-percent speed-sensitive damping. It became the Holy Grail of motocross suspension
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The 2020 KTM 350SXF makes 54.61 horsepower, which is more peak horsepower than the 2020 Suzuki RM-Z450—to get it you have to rev it to the moon.
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Areas to focus on when living and loving your 2020 Kawasaki KX450
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The inside story behind the groundbreaking Factory Edition—the AMA rule book, the history, the special effort by KTM and what's what on the latest version
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