[arekzakonek]

Hi all,

I'm about to change both sprockets and chain on a 2002 748.

My question is whether I can do it while the bike is on the side-stand? In other words, will the wheel come off when unfastening the big rear sprocket nut? Some people say it will, some say it will not - what's up and down here?

I do have a generic centre stand (one of those hydraulic things) but that fits poorly under the bike.
Maybe the answer is in my Haynes manual, but I haven't been able to find it.

Thanks,

 

[t-bills]

You can swap the chain and sprockets while the bike is on the side stand. The large axle nut will allow you to remove the cush drive and sprocket. The wheel will not fall off. It is held to the hub on the other side by another large axle but.

 

[DukeDesmo]

Indeed you can and it looks like you have a quick change sprocket/carrier so don't need to touch the sprocket carrier nut, just the 6 nuts on the actual sprocket.

 

[arekzakonek]

Indeed you can and it looks like you have a quick change sprocket/carrier so don't need to touch the sprocket carrier nut, just the 6 nuts on the actual sprocket.

Well actually I have purchased a "normal" sprocket as it came in the chain and sprocket kit, so it seems I have to get the nut off. At any rate, if I can do it on the side-stand then that's what I'll do.

Thanks,

 

[loony888]

Well actually I have purchased a "normal" sprocket as it came in the chain and sprocket kit, so it seems I have to get the nut off. At any rate, if I can do it on the side-stand then that's what I'll do.

Thanks,

Don't do that, use the quick change carrier and get a sprocket that suits, the carrier has retainers that stop the cush drive rubbers walking out the back of the carrier and damaging the eccentric, it's lighter as well and also makes sprocket changes much simpler.

 

[forsythem]

...the carrier has retainers that stop the cush drive rubbers walking out the back of the carrier and damaging the eccentric....

This happened to me a couple of months ago... a have the barest bee's dick of a sliver of eccentric left to grab onto to rotate for chain adjustment, those rubbers walked out and destroyed most of the alloy there.

Ouch!

 

[vtwin]

the carrier has retainers that stop the cush drive rubbers walking out the back of the carrier and damaging the eccentric,

Or, the retaining clip groove can grow (for some weird reason) and also allow for the sprocket to move and do the same damage. I know this from first hand experience. Using 998 parts and milling some off of the eccentric can solve this.

 

[arekzakonek]

Or, the retaining clip groove can grow (for some weird reason) and also allow for the sprocket to move and do the same damage. I know this from first hand experience. Using 998 parts and milling some off of the eccentric can solve this.

Hmm I see. The majority of you opt for the quick carrier. I'll stick to that then, and get a new sprocket for that. I see these are half price as well - even better. Will use the other one I have already purchased as a paper-weight.

 

[DukeDesmo]

Don't do that, use the quick change carrier and get a sprocket that suits, the carrier has retainers that stop the cush drive rubbers walking out the back of the carrier and damaging the eccentric, it's lighter as well and also makes sprocket changes much simpler.

Or, the retaining clip groove can grow (for some weird reason) and also allow for the sprocket to move and do the same damage. I know this from first hand experience. Using 998 parts and milling some off of the eccentric can solve this.

I had both the above happen (on separate occasions).

The first time I put up with a slimmed down eccentric as I caught it in time but the second time it was too thin to adjust and obviously weakened so I had to buy a new hub.

Not only are replacement hubs & bearings expensive but I also needed a nigh on 200 mile recovery home in a van late one Sunday night after the cush popped.

 

[themonkeyman89]

You can swap the chain and sprockets while the bike is on the side stand. The large axle nut will allow you to remove the cush drive and sprocket. The wheel will not fall off. It is held to the hub on the other side by another large axle but.

The wheel cannot come off the hub, but the whole hub/wheel assembly can slide out the right side of the eccentric with the sprocket carrier nut removed, so use caution.

 

[vtwin]

I had both the above happen (on separate occasions).

I remember your post about this many years ago and proceeded to fix mine as per your post. And, as I was typing an answer to @arekzakonek I thought you should chime in as well :-D

 

[arekzakonek]

I had both the above happen (on separate occasions).

The first time I put up with a slimmed down eccentric as I caught it in time but the second time it was too thin to adjust and obviously weakened so I had to buy a new hub.

Not only are replacement hubs & bearings expensive but I also needed a nigh on 200 mile recovery home in a van late one Sunday night after the cush popped.

Ouuuch! Alright! I have been convinced, converted and all that. Sprocket carrier it is. I wonder why the sprockets don't come with a "lip" that holds the cush in?