09 Thunder Mountain Keystone Chopper Motorcycle FacebookTweetPin Russ shared his 09 Thunder Mountain Keystone Chopper Motorcycle with us. Submitted by: Russ Hemmert FacebookTweetPin Related Posts Old School and Cool | Motorbike Reg’s Deuce Riding Glenn’s Old School 70’s Chopper | Best Motorcycles Honda Chopper VTX 1800 | Honda Chopper Most Popular Chopper in 2013