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Motorcycle Modifications, Repairs, Restores, and Upgrades:

Motorcycle modifications and repairs, restoration and upgrades... if you are fixing your motorcycle, post up about it here.

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Old 11-10-2008   #1 (permalink)
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Rear Swapping

I had never heard it called "rear swapping"... I just called it the wiggles.

Quote:
Problem: When braking aggressively while approaching a corner, the bike’s rear end begins to swap side-to-side, and feels as if it wants to pivot around the front.

Solution: The cause here is way too much front-end weight transfer under braking. The front end is compressing so low that the bike’s weight tries to pivot around the steering head, causing the side-to-side movement. The quickest solutions here are to increase the front fork spring preload and/or raise the front ride height by dropping the fork tubes in the triple clamps, or decrease the rear ride height by shortening the shock (if possible). You should try increasing the fork spring preload first and progressing in small increments until the handling begins to be negatively affected (remember to watch the rebound damping when increasing the spring preload). If that doesn’t work, you should try the ride height modifications; watch for adverse handling reactions in other areas when doing this as ride height changes drastically affect how the bike corners. Other solutions to try—although less effective—are to increase the compression damping in the forks (if possible), or to decrease rebound damping in the rear to allow the rear tire to follow the pavement quicker.
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braking, rear swapping, suspension, wiggling

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