Pickup coils ate themselves today.

[GLoweVA]

Not sure why, or how bad, but I won't give up.
it happened at about 65mph. Just started sputtering and backfiring and then died. I look down and see this.

[GLoweVA]

Got home and took the cover off. OMG.
looks like the vacuum advance came loosec and it over rotated.

[GLoweVA]

Got some debris in the cover too.

[Bax]

Hi George, I thought I was having a bad day.......... Have you ever had or know of that bolt being removed from the crank end before?

---Bax

[GLoweVA]

Hi George, I thought I was having a bad day.......... Have you ever had or know of that bolt being removed from the crank end before?

---Bax

Yeah I've had that bolt out a few times. Last time I think I put loctite on it. Must not have torqued it enough.

[Radioguylogs]

That's a failure mode I don't think any of us has seen before.

Easy to diagnose.

Hope it's easy to fix.

[bikerphil]

Maybe a drop or two of thread lock blue this time? That's brutal.

[dpotter58]

Good to see you back on here

[red bandit]

That pic is awesome. Sorry for you troubles.

[shutchis]

Wow, that's a sad looking disaster. Do you need some parts? I think I have them in my parts bin. I replaced two bikes, my XJ and XS 11 ignition systems with a GM DIS unit when I fuel injected these motorcycles. Let me know and we'll work the details.

[Bonz]

So sorry on that issue! Definitely not something that loses clearance in there on its own, I wouldn’t even hesitate to use red Loctite as it still can be removed when needed. However, thinking Loctite was used versus putting Loctite on it could explain a lot. Do you see any on the threads? Usually fairly easy to see even a small speck of it as residual.