hey guys I've been riding for years but have never bothered learning about the engine, which I regret and think I'm an idiot :nopity: lol. anyway im having a problem with my cd250u. When i first get going and fully release the clutch the engine struggles for a second and makes this weird gargle noise, almost as if it was about to stall. theres also a ticking noise coming for the top of the engine, (more on the left side) and it gets louder as I increase the throttle. the bike used to be very quiet but now its loud. any ideas whats going on? any help will be appreciated.