It was me, time for 60 hour valve clearance check, but mines a 390.
I checked mine at 1,000 an at 6,000 they're still perfect, "see" you pay for what you get, ya pay 12 for a ok bike and then you spend $$$ on it, you might as well buy something thats better and spend Ziltch on it. 570's done 6.5k and only change Oils etc nothing stuffed up and i don't think anything will until 12k.