[Ewan29]

Hi guys. My crf250r have a problem. When i start it its fine but when its warmed up it makes a noise. It sounds like a loose bolt that rattles in engin...? What could it be

[JimDirt]

Sounds like the Timing Chain is loose , could be the tensioner has gone bad , or the chain is just worn out , if it has a lot of time on it , then i would say the chain is worn and needs replacing