Trevitt’s Blog: Anti-Squat and Thrust

In the current issue of the magazine, my article covers the importance of thrust, or actual driving force to the rear wheel, and why it is an important measure. You can find an Excel file to make your own thrust chart (and other helpful downloads)">here. Thrust and anti-squat are related because it is driving force at the wheel that for the most part provides the anti-squat tendency.

Thursday, 09 January 2014 07:23

Trevitt's Blog: Squat and Anti-Squat

I have talked several times before about dynamic geometry and how rake and trail change as the motorcycle goes around the racetrack. Under braking, weight is transferred to the front end, compressing the front suspension and decreasing rake and trail measurements. Likewise, weight transfer to the rear under acceleration causes the front suspension to extend and the rear to compress, increasing rake and trail.

Thursday, 12 December 2013 11:28

Trevitt’s Blog: Corner Exits

As I mentioned in a previous blog, recent advances in tires, chassis and electronics have put more emphasis on corner entry and trail braking rather than corner exits, as this is currently the part of the track where riding skill and technique can make the most difference.

Thursday, 28 November 2013 07:36

Trevitt's Blog: Trail Braking - The Data

In my previous two blog postings, I have covered the importance of corner entry and the actual mechanics of how to trail brake into a turn and improve that particular skill. This week, I will show some data from a GPS-based lap timer that can be used to keep track of your progress.

Thursday, 14 November 2013 07:29

Trevitt's Blog: Trail Braking II

In my last blog I talked about trail braking and why it is such an important skill to learn, but I didn't go into the actual mechanics of the technique, or how to learn and improve at it. To recap, trail braking refers to trailing the brakes as you lean into a corner, so that there is some combination of cornering and braking forces working together. It's a skill that sets riders apart on the track, and one that can help get you out of a bind on the street.

Friday, 01 November 2013 07:15

Trevitt's Blog: Trail Braking

As I work with more riders using data acquisition and look at more data, the common theme that always rises to the surface at some point is turn entry and trail braking - holding the brakes on while leaning into the corner.

Thursday, 17 October 2013 14:19

Trevitt's Blog: Extreme Lean Angle

A video released by MotoGP last week (See bottom of the page) shows Jorge Lorenzo's Yamaha YZR-M1 in pit lane leaned over on its side to the same angle it reaches on the track - 64 degrees from vertical. It's an incredible sight when shown in this manner; the bike is essentially laying on its side and less than two feet tall. Lorenzo, in street clothes, tries to get into his normal riding position on the prone bike, but without the cornering forces to hold him in position, it's impossible.

Friday, 04 October 2013 07:15

Trevitt’s Blog: Using Altitude and Slope to Your Advantage

Watch any motocross race and you will see the riders going far out of their way to take advantage of a berm, or completely missing the apex of a turn to ride on the out outside, banked portion. This shows the importance of elevation changes for quick lap times in the dirt. But while the slope and camber of a paved race track or a winding country road are much more subtle than a motocross track, it's just as important to take advantage of those elevation changes.

Thursday, 19 September 2013 07:01

Trevitt’s Blog: The Safety Aspects of Data

The recent events in the Canadian Superbike series at Canadian Tire Motorsport Park and Le Circuit Mont-Tremblant have prompted me to address the safety benefits of using data acquisition, which are often overlooked and deserve more attention. While I did not know Christian Auger or John Ross MacRae, my thoughts and sympathies are with their families and friends.

Thursday, 05 September 2013 16:06

Trevitt’s Blog: So much data, so little time…

At the recent Canadian Tire Motorsport Park rounds of the Canadian Superbike Championship, I was at the track helping Jodi Christie, John Sharrard and the Accelerated Technologies/Honda team and continuing my work with the their AiM data acquisition system. At the previous round we had concentrated mostly on suspension setup for the CBR1000RR, and the newly resurfaced parts of CTMP meant this would continue to be the focus for most of the weekend.

Thursday, 22 August 2013 12:17

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