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+--- Thread: Loose sprocket cover (/showthread.php?tid=72431)
Loose sprocket cover - Jamieg285 - 05-05-15
Riding home today and my clutch suddenly went from a couple of mm play in the lever to almost all travel. When I got home and investigated I found 1 (lower) bolt missing and 3 others loose and almost out too, allowing the cover to flex out when pulling the clutch in. I've tightened them all back up and will get a replacement for the missing one, but I am concerned as to why this has happened all of a sudden.
Has anyone had this before, or is this a rare occurrence?
BTW the bolts were last touched when I changed the chain - about 11K miles ago.
Re: Loose sprocket cover - darrsi - 05-05-15
That ain't normal at all, is bike left out for people to tamper with?
Re: Loose sprocket cover - Jules-C - 05-05-15
It does happen occasionally. Its only when the last couple of bolts really loosen you notice it and then its only a few gear changes away from becoming undriveable. But once you find out what the problem is its a simple fix
Re: Loose sprocket cover - darrsi - 05-05-15
(05-05-15, 09:11 PM)Jules-C link Wrote: It does happen occasionally. Its only when the last couple of bolts really loosen you notice it and then its only a few gear changes away from becoming undriveable. But once you find out what the problem is its a simple fix
What are you talking about???
No it does not happen occasionally at all?
If everything is done up correctly to start with it should never happen.
And find out what problem?
The problem is that the bolts are loose!!!
Re: Loose sprocket cover - Flak - 05-05-15
(05-05-15, 06:04 PM)Jamieg285 link Wrote: Riding home today and my clutch suddenly went from a couple of mm play in the lever to almost all travel. When I got home and investigated I found 1 (lower) bolt missing and 3 others loose and almost out too, allowing the cover to flex out when pulling the clutch in. I've tightened them all back up and will get a replacement for the missing one, but I am concerned as to why this has happened all of a sudden.
Has anyone had this before, or is this a rare occurrence?
BTW the bolts were last touched when I changed the chain - about 11K miles ago.
Coincidentally, this happened to my 600 just last week. Was riding home and the biting point was getting nearer and nearer the handlebar, made it home OK though.
On examination, the cover was visibly moving when the lever was pulled. The bottom two allen bolts were missing and the whole cover was flexing on the top bolts. The cover was last off a couple of years ago for a change of chain and sprockets. It is unlikely that the bike has been tampered with as it is usually garaged and given where I was coming from.
Just vibrated loose is my best guess.
Re: Loose sprocket cover - anutz - 05-05-15
when i took my sprocket cover on and off i peeled off the gasket that was breaking down so i figured it would be useless...
I noticed after a few rides the bolts needed nipping up so i keep an eye on it at the moment....
Re: Loose sprocket cover - darrsi - 05-05-15
(05-05-15, 11:07 PM)anutz link Wrote: when i took my sprocket cover on and off i peeled off the gasket that was breaking down so i figured it would be useless...
I noticed after a few rides the bolts needed nipping up so i keep an eye on it at the moment....
Hmmm, interesting, i believe it was Deefer who suggested the gasket was to separate the 2 metal surfaces of the sprocket housing.
Could this be the answer as to why there's a gasket there in the first place, to dull any vibration, perhaps ???
Rather than nipping up, they should be torqued evenly anyway, which could possibly be a reason for loosening?
Saying that, i have no gasket, and i do torque the bolts, but have never once had any such issues?
Re: Loose sprocket cover - darrsi - 06-05-15
Is the cable lubed up and working freely as well, i'd imagine unwanted friction could cause more pulling force on the sprocket cover housing maybe causing enough momentum to work bolts free after time.
Still shouldn't happen if all evenly torqued up properly though! :look
Re: Loose sprocket cover - fazersharp - 06-05-15
Are they perhaps aftermarket stainless/ anodized bolts - maybe with the thread slightly off and so not actually biting p and gripping properly
Re: Loose sprocket cover - His Dudeness - 06-05-15
I'd say it's either aliens or they probably weren't done up properly
Re: Loose sprocket cover - anutz - 06-05-15
its got to be aliens.....i am sure one snapped my exhaust studs....
Re: Loose sprocket cover - sinto607276 - 06-05-15
(06-05-15, 08:24 AM)anutz link Wrote: its got to be aliens.....i am sure one snapped my exhaust studs....:agree :lol
Re: Loose sprocket cover - fazersharp - 06-05-15
CAUGHT THE BASTARDS !!!
[img height=366 width=500]http://foc-u.co.uk/index.php?action=dlattach;topic=15542.0;attach=15456;image[/img]
Re: Loose sprocket cover - anutz - 06-05-15
:lol
Re: Loose sprocket cover - darrsi - 06-05-15
Made me a bit paranoid, so I checked mine this morning, they ain't going nowhere, the same as my sump plug. :lol
Re: Loose sprocket cover - Jamieg285 - 06-05-15
At least I'm not the only one.
The gasket is missing on mine, so it may be that.
I think I'll put a bit of thread lock on for now.
Re: Loose sprocket cover - Jamieg285 - 07-05-15
UPDATE - having tightented the cover back up and gone out for a ride, it looks like the bolts may have been working loose for quite a while. The clutch cable is tight, with no slack at all at the lever, and all the action happening within the 1st couple of mm. It wasn't like that when I adjusted it, so the cover must have been loose then.
I've got to back the adjustment off a bit now.
Re: Loose sprocket cover - darrsi - 07-05-15
Adjust from the bottom end first, then the top.
Re: Loose sprocket cover - Jamieg285 - 07-05-15
(07-05-15, 12:29 PM)darrsi link Wrote: Adjust from the bottom end first, then the top.
No need for that this time. Just backed off the top one a turn and a bit and it's fine.