K75S Clutch replacement questions

[sooprvylyn]

Everything I've read about these $5/ea bmw clutch bolts has said they are stretch bolts. Maybe I've just read it wrong. Whatever, do what you want.

[Laitch]

Anyhow, that's just me and my personal experience with lots of K bikes. Other people can do whatever they want.

Whatever, do what you want.

Just don't expect to do it in peace around here. 

[beetsandbeats]

Wow, I disappear for the weekend (I had a big move to do) and things got a little off topic! Are those bolts we talking about the ones included in the kit? https://kpartsholland.com/products/complete-clutch-kit-k75

As requested by Laitch, here's the video:



I hope the sound quality is good enough. My phone has a terrible camera.

[Laitch]

Thanks for providing the video.    Your camera ranks higher than terrible. I could identify the subject and the sound was distinctly neither a barking seal nor flatulence. 

That's the bolt alright.  What might be desirable is to torque them to 17Nm—as Chris Harris recommends—rather than 21Nm because they've already been stretched once. I reused mine once torquing them to 21Nm with no unpleasant results after 40K miles. I replaced them when I replaced the friction disc at 90K miles. As you might have gleaned from this thread, replacing them is optional. I like the kit photo of the gargantuan crush washer!   

I hear what could be clutch hub spline failure. The rhythmic clunk could be the driveshaft u-joint failing; however, there should be a vibration associated with that. I believe your intervention right now is fortunate. Start disassembling to view what is actually happening in there. Maybe you should wait before spreading your wealth so extensively.