With four small kids and a busy touring schedule, Zac Brown probably doesn't have time to ride his Harley Davidson motorcycle much -- and it could be put to good use. The singer has listed the bike for auction on eBay, with all proceeds going to Andrew's Warriors, a charity to help a 10-month-old boy with Central Core Disease.

According to the eBay posting, CCD is a rare form of muscular dystrophy. Andrew was born eight weeks premature and struggles to breath on his own. He requires nursing assistance 12 hours a day and is tracheotomy and ventilator dependent.

It's not clear how Brown became involved with the effort to raise money to help the boy and his family fight this relatively unresearched disease. The Harley is a 2002 Custom CVO Harley Davidson Wide Glide, which features a Willie G package and a custom Cayman alligator seat. It has just over 5,000 miles on it and will need to be picked up by the highest bidder in Atlanta, Ga, where Zac Brown Band is based.

Bidding opened on Wednesday (Feb. 22) and lasts through Feb. 28 at 10:20AM ET. Currently, 20 people have bid on the bike and the price stands at $11,000.