Why is the initial 10 to 15 minutes of rainfall particularly hazardous for motorcycle braking and traction?

1. Tire air pressure increases rapidly when touching cool water
2. Rainwater immediately mixes with accumulated road oil, dust, and rubber residues to create a slick emulsion before being washed away
3. Brake pads immediately disintegrate upon contact with rain
4. Engine power increases uncontrollably due to cooler intake air