hi all,
i am new here to this forum and i am after some advice i have a Yamaha xt660x 2009 and i have a clunk noise/ clicking noise to it i thought it sounded like the big end (only done 10,500 miles) ive had some people listen to it and the best option so far is it could be the balance shaft that's come loose (only just bought biker form private seller ) went for a ride of 200 miles after the first 100 this noise appeared and i want to get to the bottom of what it is soooooooo .... my questions are
is this a common problem with this clunky tick over sound coming from round the crankshaft ?

and does anybody have any information on how to get to the ballancer shaft to check its all ok ? e.g diagrams step to step guide what cover i need to remove to reach it (i do have mechanical experience fully trained bike mechanic but im not used to stripping down bike engines) thanks for reading and any help given i thank you in advance (sorry if i have posted this in the wrong place or anything im pretty new to forums)

thanks in advance, ashley!!!