Just brought the bike back to the shop. He wants to put in the Kymco rollers not the knock offs that are in it now. I was looking at older video's and noticed the rpm's were a little lower than what they are now. I also noticed that as time went on the rpm's went higher and this makes me think that maybe the ware in the rollers changed the rpm's and maybe putting back in the original rollers (new one's) it maybe come back to how it was from the start? Just me thinking here.