Tank Slapper / Wobble
Uncontrollable handlebar oscillation at speed — the bars violently slap side to side.
What is it
A tank slapper (wobble) is a rapid oscillation of the handlebars from side to side. The bars violently slap left and right, and the motorcycle becomes uncontrollable. At high speed, this is one of the most terrifying situations a rider can face.
How it happens
The front wheel lifts off the road (from a bump, wheelie, or hard acceleration), and when it returns it contacts at an angle. Oscillation begins — each deflection amplifies the next. Without a steering damper, the bars can reach uncontrollable amplitude within seconds.
How to reduce the risk
- Hold the bars loosely — death-gripping amplifies the wobble
- Grip the tank with your knees — stabilize the bike with your body, not your hands
- Gently roll on the throttle — load the rear wheel to stabilize the chassis
- Install a steering damper if you ride fast sportbikes
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Related terms
Highside
A violent ejection over the top of the motorcycle — one of the most dangerous motorcycle crashes.
Lowside
The motorcycle slides out and falls to the inside of the turn. Less violent than a highside but far more common.
Stoppie
Flipping over the front wheel from excessive front brake force. The rear wheel lifts off the ground.
Whiskey Throttle
Involuntary throttle opening from panic — the hand grips tighter, accelerating the bike uncontrollably.
T-Bone Collision
A right-angle collision where one vehicle strikes the side of another. Extremely dangerous for motorcyclists.
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T-Bone Collision
A right-angle collision where one vehicle strikes the side of another. Extremely dangerous for motorcyclists.