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Tech & How-to

Everyone knows K&N makes air filter elements that pass more air than the stock H-D ones do, which means more horsepower. But did you know that it also makes great air cleaner housings? Case in point is the made-in-the-US chrome beauty we bolt onto a rubber-mounted Sportster in the accompanying photos. Named simply the #RK-3929 ($339.95), this unit... [Read more of this review]

The owner of this 2009 CVO 110″ wanted the same things as thousands of other Twin Cam owners, be they 88s, 96s, 103s, or 110s: a better exhaust note, smoother idle, no popping on deceleration, better off-the-line power, and, you guessed it, more power across the board, not only at a high rpm. That’s a reasonable request to be sure, but not one... [Read more of this review]

Ask anyone who knows what makes motors run, and he’ll tell you the name of the game is getting as much fuel over the piston as possible and burning it as completely as you can at just the right moment. How much fuel you can burn depends on how much air you can get flowing in and out of the engine. And since you can’t flow more air through the motor... [Read more of this review]

Ever need to look inside a gas tank to see if there’s rust or sandblast material in there? What about looking inside the engine through the spark plug hole to find out if the cylinder walls are marred? With the VideoStik from VOscope you can do all that, as well as inspect the bore of a mainshaft (the hole where the clutch rod goes) for damage and... [Read more of this review]