I just bought my 1300 last month. No buzzing sound on my bike. Just a slight vibration on the handlebars though. Overall, I am very happy with this purchase. I receive alot of looks from the Harley guys who actually think it is a Harley. (At 1/3 the price). Did notice it takes awhile to warm up. Stutters at first if not fully warmed. Will leaving the choke on ruin the pistons?