got kinda knockin noise in top left side of motor .pulled cam cover off and cam chain looks real loose lots of slack even with tensioner is all the way out .should chain have that much slack or should it be kinda tight. I have a clymers book but it doesent say how much slack it should be.sounds like the noise is thatand maybe valve adj. thanks for ur help

 

Might be time for a new cam chain if it has a lot of slack as the tensioner self adjusts. Plus not a bad idea to check the sprockets for wear. Dirt Cheap Yamaha, Honda, Arctic Cat & Polaris OEM Parts & Accessories – Cycle Parts Warehouse