California DMV Motorcycle Knowledge Test (M1)Hazard Avoidance and Emergency ManeuversMedium
You are riding your motorcycle on a highway when you notice the engine suddenly revs loudly and uncontrollably, even though your throttle is in its normal position. What should be your immediate first action?
- AApply the brakes firmly to slow down.
- BImmediately pull in the clutch and close the throttle.
- CShift into a higher gear to reduce RPMs.
- DPull over to the side of the road and turn off the engine.
Show answer & explanationAnswer & explanation
Correct answer: B. Immediately pull in the clutch and close the throttle.
If the engine revs uncontrollably due to a stuck throttle or other issue, pulling in the clutch immediately disengages power to the rear wheel, preventing runaway acceleration. Closing the throttle is also crucial.
Why the other options are wrong
- A. Applying brakes firmly against a runaway engine can lead to overheating, brake fade, or loss of control if the engine is still powering the wheel.
- C. Shifting into a higher gear might temporarily reduce RPMs but doesn't address the underlying issue and could still lead to dangerous acceleration.
- D. While pulling over is the eventual goal, the immediate danger is the uncontrolled acceleration, which must be addressed first.
Runaway Engine Response
If the motorcycle engine revs uncontrollably, immediately disengage power to the drive wheel and attempt to cut fuel/air supply.
- Pulling in the clutch disengages the engine from the drive wheel.
- Closing the throttle attempts to cut fuel/air.
- Do not immediately rely on brakes against a powered wheel.
Memory trick: Clutch, throttle, kill switch – stop the wild beast!