Hi, I picked up a 2006 Hyosung Gt250 10000km on the clock on the weekend and after my mate rode it home for me it has a rattling sound coming from the engine when in gear or not. Its there from idle to about 2000rpm, then its not sounds fine. Ive taken the side covers off and changed the oil and there is no metal shavings in there, ive also checked the valve clearance and that is in tolerance. Any suggestions what it may be, i read there was a recall on the cam chain tensioner im not sure what sound that makes when that goes or the the timing chain guides go. Its going to the mechanics in 1 week but any checks i can make before would be great.Thanks in advance.