Summer Heat Brings Bike Trouble: Vapor Lock, Rising Tire Pressure, Soft Asphalt

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Japan's summer heat is hard on motorcycles too: boiling brake fluid can cause vapor lock, leaving the lever soft, while hot pavement raises the air pressure inside tires. When road surfaces exceed 60°C (140°F), asphalt can soften enough for a kickstand to sink in and tip the bike over, so riders are advised to use a stand pad. Heat exhaustion is also a risk, since wind dries sweat and can mask dehydration.