Hello new to cfmoto and this forum. Just bought a non running  2019 z force 500 trail.  Was told by the old owner that the technician he had look at it that it had been dusted and there was a hole in the head.  Upon inspection and top end tear down did not see hole in head,  did find timing chain loose for tensioner was broke, cylinder has some wear, one exhaust valve appears bent.  So would like to find a piston cylinder kit with cylinder, piston, rings,and gaskets. Also timing chain kit with tensioner.  Any suggestions on where to get parts? Are any of the kits listed on eBay of the right engine type and will they work? Did find dirt in the intake pipe after filter so will be getting a unifilter as suggested by all the posts.   Any and all advice will be considered and greatly appreciated. Thanks