If your throttle is stuck and twisting it back and forth does not release it, you should
- use engine braking.
- operate the engine kill switch. ✓
- use the front brake only.
- apply both brakes.
Answer: B. operate the engine kill switch.
You should operate the engine kill switch.
Why this is the answer
The handbook's stuck-throttle procedure says to relax, let up on the throttle, pull in the clutch and turn off the engine with the kill switch. It also describes the kill switch as the control for stopping the engine quickly in an emergency. That makes the kill switch the direct response when twisting the throttle back and forth does not free it. The passage mentions using the brakes to stop the engine only as another possibility, after the main kill-switch instruction.
Why the other answers are wrong
- A. use engine braking. — Engine braking is not the handbook's stuck-throttle remedy; the procedure calls for pulling the clutch and shutting off the engine with the kill switch.
- C. use the front brake only. — Using only the front brake is the handbook's hill-start technique, not its stuck-throttle procedure, and it does not shut off the engine.
- D. apply both brakes. — Applying both brakes is not the first response described; the handbook directs you to the kill switch, with brakes mentioned only as another way to stop the engine.
Remember it
If the throttle will not let go, shut the engine down first: clutch in, kill switch off.