Bought 2006 C50 in sept 05, 14,500 miles now. added: saddle bags, passenger foot boards & back rest, pull back handle bars, Suzuki crash bars, Vetter fairing, plugs Honda dpr9ea-9(Texas heat), wix oil filter, amsoil in eng (removed noise & vibration)& rearend, k&n air & plugged intake holes & drilled 12 half inch holes along the bottom(deeper sound).... Runs cooler & even better with the air mods. I like the high octane, no knocking. Valves never adjusted. No problems at all. Commute 44mi everyday for 13mo.s now, very reliable. I do see some cracks around the front hub left side, watching it closely.