Ground Pounder Chopper FacebookTweetPin Copr Choppers’ Ground Pounder is one of the cleanest builds around and was the overwhelming victor in the Motorcycle USA Biker Build-Off. Courtesy Motorcycle USA. FacebookTweetPin Related Posts Mike’s Home Built Chopper | Best Motorcycles Full of Bull Howards Killer Custom Hubless Chopper Fear Nothing | Best Motorcycles Army Chopper Wrecked Metals