Just want to share my almost year long start-up noise troubleshooting. I could never find my problem on this forum. It is difficult to find old posts that I commented on or to find a previous post that has to do with my problem. lol could be just me. Anyway back to the problem. My 13' had a terrible noise mostly on first start-up. The posts I would find here all said compensator R2 but I wasn't sold on that. For me it had to be a running motor noise for a bad comp or on shut down. Mine was just on start-up. Long story short I finally found a you tube video with my exact problem. Sometimes it took me 2/3/4 tries to start the bike. It was embarrassing during rides with groups. After removing the starter and replacing the starter clutch the problem is gone!!!! So this is just fyi for anyone that has had this situation. Total fix time was 2 hours.....Eazy..Pezy..