Allyn started writing for TopSpeed in 2015, but has been writing on motorcycle and automotive topics since 2008 for outlets such as eHow, USAToday, and subsidiaries of MotorTrend. Formally trained as ...

Harley-Davidson was founded over 120 years ago and has been manufacturing motorcycles in America since 1903. The company's first motorcycle, the Model 1, was designed in 1901 and produced until 1904.

The rocker arm is possibly the third most abused part in your engine. The connecting rods take the cake for the most abuse, followed closely by the piston assembly, but we like to think the rocker ...

Blend your specific street/strip performance needs with Winston Cup, Busch GN, and a healthy dose of state-of-the-art technology and what do you get? Pedigree and power well beyond what might normally ...

Some parts are high on the attention list when putting together a fresh mill, while others are just taken for granted. When it comes to engine bearings, what's hugging the crank and rods is given the ...

Despite declining sales and revenue in 2025, Harley-Davidson has been the dominant American motorcycle maker for most of its long and illustrious history. Harley has produced a succession of engines ...

Flat-tappet camshafts are commonplace in the motorsports scene. From NASCAR Sprint Cup Series to IMCA Mods, guys across the nation are running this venerable design. About ten years ago, these cams ...

This third installment in the golf putter design series moves the process from reverse engineering and additive manufacturing to CAD/CAM software. Turning attention to the role of CAD/CAM software in ...

The CAM industry is a little late to the party when it comes to electrification, but this means it benefits from a thriving and established electrification supply chain courtesy of the automotive ...

Designing and manufacturing electric motors is taking a few steps forward thanks to continuing work by ECM PCB Stator Technology – developers of a patented technology for printed circuit board stators ...