Hi, I'm new to this biking thing so may just be paranoid. I also understand that noise is subjective so I could just be being overly precious. so I purchased a 2011 ybr 3 weeks ago from a second hand dealer (without warranty, they are a fair distance away so I wouldn't be able to get it back to the them if there was a problem anyway and they knocked £200 off ) now I'm guessing its just me but when opening the throttle, the engine just seems overly noisy, it has oil, starts fine, idles at between 1500 and 2000 depending on if it's cold or warm, doesn't seem to lose power (I'm getting 50-65mph I'm a big chap). the noise to me sounds like an exhaust blowing on a car, I've looked it over and can't find any holes but the noise appears to be coming from the front of the engine where the exhaust is. any thoughts or am I just being and over anxious paranoid precious noon?