Motorcycle Maintenance

Active versus Semi-Active Suspension | Ask the Geek

I love F1 Racing, car technology, and how all of it ends up in sportbikes. Can you explain how the dynamic damping control and semi-active suspension varies from active suspension that was outlawed in F1 Racing in 1993? Does the BMW HP4 have active suspension, since it measures conditions at 100 hertz? Is the technology […]

Motorcycle Maintenance

Inside the 2017 Suzuki GSX-R1000 Part 1: Chassis and Electronics

Suzuki recently unveiled its new GSX-R1000 and GSX-R1000R at the Intermot show, and the new bike is packed with updates and new features. Here we look at the chassis and electronics of the updated GSX-R, through a series of images release by Suzuki. Scroll through the gallery to learn more about the new GSX-R1000 and […]

Motorcycle Maintenance

Inside the 2017 Suzuki GSX-R1000 Part 2: Engine

Last week we looked at the chassis and electronics of the 2017 Suzuki GSX-R1000 and GSX-R1000R, this week we will take a closer look at the new bike’s engine via a gallery of images from Suzuki. The engine is significantly updated from the previous GSX-R’s powerplant, with different bore and stroke measurements, the addition of […]

Motorcycle Maintenance

Motorcycle Batteries: The Difference Between Lead-Acid and Lithium-Based Batteries

Courtesy of Yuasa and Bosch Understanding which motorcycle battery is right for you—we take a look at the traditional lead-acid technology and the rise of lithium-iron. The unfortunate reality of the batteries in our motorcycles is that we never think of them until that moment we hit the starter button only to hear the telltale […]

Motorcycle Maintenance

Ducati’s MotoGP Speed | Ask The Geek

Sport Rider This chart shows the top speed recorded by the fastest Ducati, Honda, Suzuki, and Yamaha in the Qualifying 2 session at each MotoGP round in 2015. Please explain why the Ducati MotoGP bike is so fast compared to every other bike in the field. Gary Ritts Los Angeles, CA Ducati’s Desmosedici MotoGP bikes […]

Motorcycle Maintenance

ShiftFX: A New Take on The Semi-Automatic Motorcycle Transmission

Photo: Jeff Allen What started out as a aftermarket accessory is now quite possibly transforming into an OEM application in the form of ShiftFX EST (Electronic Shift Transmission). Semi-automatic transmissions haven’t made much of an impact on motorcycling, especially with American riders. Aprilia’s Mana 850 and subsequent GT version lasted only a handful of years […]

Motorcycle Maintenance

Gallery: Inside the 2016 Honda RC213V-S Part 2

Honda The V-4 engine utilizes a 360-degree crank phase angle, which leads to more favorable exhaust pulses and increased charge efficiency for better power. Additionally, the irregular interval of combustion helps improve traction performance. The 90-degree angle eliminates the need for a balancer and the associated mechanical losses, as well as making the engine more […]

Motorcycle Maintenance

Graves Motorsports Full-System Exhaust | SR Tested

Drew Ruiz The Graves Motorsports exhaust is identical to the system used by Josh Hayes and Cameron Beaubiers on their MotoAmerica superbikes. While the idea behind re-flashing the ECU on our 2015 R1 was to see how we could alter the bike’s performance using stock hardware, we were still curious to discover what the bike […]

Motorcycle Maintenance

Inside Suzuki’s Variable Valve Timing

Courtesy of Suzuki These are parts from the variable valve timing system used on the 2017 Suzuki GSX-R1000 Concept machine shown last year at EICMA. One of the two slotted plates is incorporated into the timing gear (left) and has angled slots, while the second plate (center) has straight slots; when the balls are forced […]

Motorcycle Maintenance

Formula 1 Versus MotoGP: Who Wins When Braking?

Part of Brembo’s media information for last weekend’s Grand Prix of the Americas MotoGP event at Circuit of the Americas in Texas was an interesting comparison of the braking characteristics for MotoGP and Formula 1 machines. CotA in Austin is one of two tracks that the two series share, and Brembo compared data from the […]