Correct answer
It can impair both balance and movement coordination.
Alcohol can impair balance, coordination, attention and reaction time, which are particularly important on a motorcycle. Impairment can occur below a legal limit, and effects vary between people and circumstances. No alcohol level should be treated as a guarantee of safe driving; avoid alcohol if you will ride.
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It only starts having an effect above exactly 0.5 grams per litre of blood.
It can impair both balance and movement coordination.
It cannot have any effect below 0.8 grams per litre of blood.
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