S2R 1000 Loose Rear Sprocket Normal?

[jgrm1]

I am new to this S2R 1000 and Ducati ownership, so would someone please tell me if it is normal for this bike's rear sprocket to be loose?  The bike only has 485 miles on it (405 of which I put on in the last two weeks), but if I grab it on the forward "end" of the sprocket between the upper and lower chain runs, I can move it back and forth (from left side of bike to right side) an excessive amount.  Rear sprocket play does not seem correct to me, but this is my first sssa Ducati.  I appreciate the guidance.

Best Regards,
Jeff

[yotogi]

Every one that I have seen (mine included) have some play.

I have also seen this (to varying degrees) on the superbikes that were in the local Ducati dealership's shop when I went to get mine inspected and noticed that mine had a lot of play in it.

[jgrm1]

Thanks for the comforting response.  I am going to take a closer look this evening to see if the "play" is from the cush drive.  I cannot imagine there being a problem with this few of miles, but I suppose stranger things have happened.  I do have a rear wheel / sprocket nut removal tool in transit to me and will pull the assembly off for inspection when it arrives.

-Jeff

[jgrm1]

While waiting for my big nut removal tool to arrive, I can see through the rear wheel, the sprocket is simply sliding on the OD of the cush bushings.  The cush rubbers look good and the sprocket-to-cush drive nuts are properly torqued.  I would say the movement is normal. 

-Jeff

[battlecry]

 

[ducpainter]

While waiting for my big nut removal tool to arrive, I can see through the rear wheel, the sprocket is simply sliding on the OD of the cush bushings.  The cush rubbers look good and the sprocket-to-cush drive nuts are properly torqued.  I would say the movement is normal. 

-Jeff

A reference to what could happen if all the things you mentioned are not the case....

http://ducatimonsterforum.org/index.php?topic=34425.0

[jgrm1]

I have read about the cush drive bolts backing out and machining the hub.  Not nice.  Thanks for the link. 

By the way, do any of you know the proper torque for the 32mm nut that retains the front sprocket?  I am installing a 14T sprocket this weekend and my reference materials all relate to the older style two bolt retaining plate.

Thanks again,
Jeff

[ducpainter]

I have read about the cush drive bolts backing out and machining the hub.  Not nice.  Thanks for the link. 

By the way, do any of you know the proper torque for the 32mm nut that retains the front sprocket?  I am installing a 14T sprocket this weekend and my reference materials all relate to the older style two bolt retaining plate.

Thanks again,
Jeff

Front sprocket retaining nut  M25x1.5  186 *  GREASE B

from this post...http://ducatimonsterforum.org/index.php?topic=373.msg39052#msg39052

[battlecry]

My 03 has the same spec in the workshop manual, and the front sprocket shaft has the threaded hole, yet the bike did not come with a center bolt to hold the front sprocket.  It uses the plates and two small (safety-wired) bolts.  I'm sure glad I don't have to torque anything to 186. 

[ellingly]

As the poster of the thread linked to above re: cush drives (cheers dp! Come downunder and I'll get you a  for that effort), 186 Nm isn't that bad. The key is also to grease it up - actually means the nut is on there tighter and you get a more consistent torque. Grease B is pretty much some form of moly grease.

As for the actual torquing it, I have no problem getting at least 200 Nm out of a 1/2" drive torque wrench which is 500 mm long (or, what, about 1 foot 8 inches?). The physics of it is pretty easy - 200 Nm is 400 Nm applied to the end of a half-metre (500 mm) bar. 400 Nm is pretty much 40 kg, or 88 lb, hanging off the end of that bar. That's half my mass.

[ducpainter]

As the poster of the thread linked to above re: cush drives (cheers dp! Come downunder and I'll get you a  for that effort), 186 Nm isn't that bad. The key is also to grease it up - actually means the nut is on there tighter and you get a more consistent torque. Grease B is pretty much some form of moly grease.

<snip>

I might as well put all the time I spend here to some good use.