HELP!!! 350x chain wont stay tight

[350x6b]

please someone help i have a 86 350x and just put alot of money into her new bearing front and rear and swingarm rebuild. also replace the rubbers that hold the bearing carrier when tightend. after riding for a bit the chain works itself lose and starts to fall off. please help outa ideas.!!!!!!

[Matt85'350x]

Check to make sure the frame isn't bent. I had the same issue-discovered it was that my swingarm was at an angle to the frame. Got a new frame and haven't had chain issues since. Could also be that your swingarm bolt is loose.