I have done some research on this, and have found that the RS one will work, ifyou speak with Chris from San Jose BMW he will assist you. There are some issues like the bike not starting on the first try, but it does start after a couple of times. It can be dyno'd and callibrated if need be. Great unit, they were working on the k120lt a while back, but shun away due to folks having startup issues. I was going to get one but depending on the BMW dealer, they might void the warranty if somehting in that area goes wrong. SO I will wait until the warranty is up to get a pc3.