So I bought a 44t rear sprocket from ca-cycleworks. I would like to know what is the preferred method to "restrain the stub axle against rotation" ? On DSS bikes I would put a 2x4 through the spokes but I am not so sure about my SSS S2R 1000. Manual says to remove the rear wheel before even attempting to loosen the sprocket-side nut. I will be suspending the rear from above if it makes a difference. Thanks in advance.
You can do it with the bike on the sidestand, not a biggie.
just remove left sprocket nut pull the sprocket off the axle, using an allen key and a spanner, or a socket wrench, loosen the 5 bolts that hold the sprocket carrier and swap sprockets. i did mine with a front stand since i had no sidestand at the time.
also, i didnt have a allen key that large so i just used a vice grip to keep it from moving.
Most front stands *alone* are insufficient to support the bike. You can swap sprockets with the bike on the sidestand, but if it were me, I'd want a helper to hold the bike while I loosened/tightened the axle nut.
1. Loosen the two M14 bolts that clamp the eccentric hub -- they are on the top of the rear-most part of the swingarm
2. Rotate the eccentric hub with a spanner to put slack in the chain and remove chain from sprocket (gently lay chain on swingarm)
3. Remove axle nut circlip and the large axle nut on the sprocket side (look for any spacers/washers)
4. Remove carrier/sprocket assembly (look for any spacers/washers)
5. The backside of the sprocket has large (M12?) cush-drive sockets onto which the sprocket nuts thread -- I put an allen key in a vise and placed the cush-drive socket down on the allen key and then removed the corresponding sprocket nut
6. Repeat for the other four sprocket nuts
7. Reverse process with new sprocket if its the OEM type. If you're doing a conversion, or you bought an AFAM or other carrier, follow their instructions (which will be similar to the reverse of those above)
If that was a little confusing, below is a pic that shows the "cush-drive sockets" inserted into my OEM sprocket, with the black carrier to the left of the sprocket.
(http://i34.photobucket.com/albums/d147/pompino/DSCN1623-2.jpg)
The back side of the cush drive has a socket head and is essentially a bolt with rubber a cushion around the head.
hmm it seems i forgot there was a chain invovled. i need me one of those.
I recently switched sprockets on an S2R 800, which I assume will be about the same on an S2R1k.
I did not undo the 5 cush drive nuts. After you have the carrier/sprocket assembly removed from the bike, just tap it a few times with a rubber mallot, the sprocket will come right off and you can put the new one in without messing with them.
For the axle nut - a loving wife with a foot down on the rear brake worked well for me to hold the rear wheel in place while I loosened/tightened the axle nut. I did use a rear stand.
Quote from: Darth Paul on April 20, 2009, 07:52:23 AM
I recently switched sprockets on an S2R 800, which I assume will be about the same on an S2R1k.
I did not undo the 5 cush drive nuts. After you have the carrier/sprocket assembly removed from the bike, just tap it a few times with a rubber mallot, the sprocket will come right off and you can put the new one in without messing with them.
For the axle nut - a loving wife with a foot down on the rear brake worked well for me to hold the rear wheel in place while I loosened/tightened the axle nut. I did use a rear stand.
Good call on tapping the sprocket off with a rubber mallet.
Just make sure all 5 are lined up when you press on the new sprocket -- be careful not to damage the rubber portions of the cush drives.