Bike dies when kicked into first gear after washing it with hose.

[Regg1000]

Hi folks,

My friend just got a blaster. When he first rode it, he noticed nothing unusual. However, when he gave it a wash with a hose. He noticed the bike would die when he kicked it into first gear, and a cloud of white smoke will form. He put a new spark plug in, it starts better. However, it still dies when kicked into first gear. Please help.

Thank you.