Ducati Monster Forum

Moto Board => Tech => Topic started by: yotogi on April 04, 2010, 07:36:49 AM

Title: S2R Front Sprocket Swap Questions
Post by: yotogi on April 04, 2010, 07:36:49 AM
So I am replacing my chain and sprockets. I pull the front cover off and am presented with a couple of surprises. First, there is a 14T on there. I guess that explains my general happiness with the gearing. Second, there is a single bolt holding on the sprocket as opposed to the 2 bolt and plate setup the service manual and all other explanations discuss. So the bolt is on hella tight. With the bike in gear trying to loosen the bolt results in the engine turning over after much work on the bolt.

A couple of question:
1.) Is the bolt I am working on threaded normal or backwards?
2.) I should be safe to take an impact wrench to this stubborn bolt right?
3.) What is the correct torque spec for the single bolt?
4.) I am thinking about ordering the plate and bolts to switch to the documented setup, thoughts?

Thanks in advance!s
Title: Re: S2R Front Sprocket Swap Questions
Post by: He Man on April 04, 2010, 07:53:44 AM
Are we talking about that 28mm or so nut with the metal disc holding it in place?

1) Its normal thread IRRC
2) Impact wrench, ive never been able to remove it any other way
3) Alot (sorry cant help you there but there is a thread on the DMF about torque settings for all the bolts on the bike)
4) cant answer that as i still have the stock single bolt.

I am thinking about changing my gearing as well, but only the rear.

what chain/sprocket combo are you going with?

Title: Re: S2R Front Sprocket Swap Questions
Post by: yotogi on April 04, 2010, 08:08:35 AM
Yeah, but mine is a 33mm bolt holding what looks to be a washer on the sprocket.

Well, I was happy with the gearing so I ordered a 15T and 14T front with a 41T rear quick change from Ca-Cycleworks. I was going to try the 14T and see if I liked it. Looks like I will be installing the 14T and calling it a day as I don't think that I could go to the 15T with as much commuting as I do.

I had thought about going up in the rear if I liked the 14T, but I will wait and maybe do that down the road.

Thanks for the feedback He Man!
Title: Re: S2R Front Sprocket Swap Questions
Post by: DarkStaR on April 04, 2010, 11:53:54 AM
Should be normal thread.

The 2 bolt sprocket will not fit... unless the output shaft also has the groove around the circumference to attach the 2 bolt plate...which I haven't seen yet...

if it's the 1k motor, you must be looking at the wrong serviced manual...!?!?
Title: Re: S2R Front Sprocket Swap Questions
Post by: He Man on April 04, 2010, 12:53:17 PM
also, dont be afraid if it looks like the teeth are matching up. its suppose to be like that.

I was thinking about going up 2 teeth in the rear.

Im still on stock gearing right now, which is what 15/41?

I just bean cleaned my chain, and the rollers still spin 100% freely after 16,000 miles and lubing my chain once in a blue moon. looks like im keeping my chain and sprockets for a while more.
Title: Re: S2R Front Sprocket Swap Questions
Post by: yotogi on April 04, 2010, 01:52:37 PM
Quote from: DarkStaR on April 04, 2010, 11:53:54 AM
if it's the 1k motor, you must be looking at the wrong serviced manual...!?!?

Thought that might be the case, but I am looking at the Monster S2R 1000 Model Year 2006 Edition 00 service manual that I downloaded from duc.nu. It is just plainly wrong in this regard as the description and the pictures are clearly not what I currently have on my bike.

I thought that the previous owner might have changed it up to mount the 14T that is on there (it doesn't have the holes for the 2 bolt setup) while the new JT fronts from Ca-Cycleworks do have the holes, but based on what I am hearing that probably just isn't the case.

Didn't get a chance to pick up the impact today, guess I will give it a go tomorrow after work.
Title: Re: S2R Front Sprocket Swap Questions
Post by: jgrm1 on April 05, 2010, 05:03:55 AM
Ducati went to the big nut sometime between 2006 and 2008.  My 2008 has the big nut and I was able to break it loose by hand.  I retorqued to 136 ft-lbs, which required sitting on the bike, holding the rear brake, and pulling up on the torque wrench.  It's a pretty easy job.

-Jeff

Title: Re: S2R Front Sprocket Swap Questions
Post by: He Man on April 05, 2010, 05:28:57 AM
they changed it in mid 06 i heard as some bikes still had the 2 bolts.

Title: Re: S2R Front Sprocket Swap Questions
Post by: Armor on April 05, 2010, 07:26:32 AM
I have a 2004 M1000 and it has the single nut.
Title: Re: S2R Front Sprocket Swap Questions
Post by: mikeb on April 05, 2010, 11:35:22 AM
I believe the bolt patter depends on bike size....not year model.  I've seen the double on 620's and 800's....and large bolts on 1000's and S4R's. 
Title: Re: S2R Front Sprocket Swap Questions
Post by: yotogi on April 06, 2010, 06:12:30 AM
$45 HF impact wrench and 15 seconds later...

Didn't have the time to get it all put back together last night, but it was nice to be able to clean the insane amount of chain wax from the case around the sprocket.
Title: Re: S2R Front Sprocket Swap Questions
Post by: He Man on April 06, 2010, 09:18:50 AM
Quote from: yotogi on April 06, 2010, 06:12:30 AM
$45 HF impact wrench and 15 seconds later...

Didn't have the time to get it all put back together last night, but it was nice to be able to clean the insane amount of chain wax from the case around the sprocket.

why would you want to clean it? everytime your chain slides by taht area, the gets some good old wax back into its system!!!
Title: Re: S2R Front Sprocket Swap Questions
Post by: yotogi on April 06, 2010, 01:13:03 PM
Quote from: He Man on April 06, 2010, 09:18:50 AM
why would you want to clean it? everytime your chain slides by taht area, the gets some good old wax back into its system!!!

Uh, the wax buildup was maybe a couple of mm thick, far far away from the chain. I can only imagine what it would look like to do what you describe.  :o :o
Title: Re: S2R Front Sprocket Swap Questions
Post by: He Man on April 06, 2010, 03:55:41 PM
Quote from: yotogi on April 06, 2010, 01:13:03 PM
Uh, the wax buildup was maybe a couple of mm thick, far far away from the chain. I can only imagine what it would look like to do what you describe.  :o :o

Looks like i need to clean my bike a little more often.