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Author Topic: need a new chain  (Read 3427 times)
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dziner996
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« on: July 06, 2009, 09:29:58 AM »

the chain on my 996 has seen its last day. Would like to know if anyone has upped or gone down a tooth with good results.  I'll have to replace the sprockets anyway and figured i could get more low end acceleration in the change.
thanks
dan

00  996
30,000 miles and it was the original chain
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Uncle Mofo
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« Reply #1 on: July 06, 2009, 10:40:35 AM »

I went down one tooth on my previous monster. I liked it.  The bike behaved better in traffic and on low rpms. Only downside was the front wheel coming up more often and the chain rubbed a bit against the swingarm.     
 The bike was a 05 S2R
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2007 Red S4Rs 2008 Great Lakes Ducati Rally & Track Fest People's Choice Award Winner. 2014 Monster Challenge 3rd Place
2005 S2R Dark  2007 Ducati Day Daytona People's Choice Award Winner (sold)

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« Reply #2 on: July 06, 2009, 10:41:18 AM »

I thought every single Duc benefited from going 2 up in the back or 1 down in the front.... I know it's comparing apples to oranges, but I went 2 up on the back of my M1000 and like it a lot.... also did 1 down in the front on a M620 - if you're replacing the chain anyway I'd up the back instead of dropping a tooth on the front
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giladl
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« Reply #3 on: July 06, 2009, 12:16:17 PM »

3 up on the back sprocket, made a huge difference on my 750 SS - love it. Only downside is the highway riding down to the south is at higher revs.
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Ducatiloo
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« Reply #4 on: July 06, 2009, 02:01:07 PM »

I went down one in the front on my S2R.  Stop lights have become much easier.
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exmayor
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« Reply #5 on: July 06, 2009, 02:50:11 PM »

I went 1 down on the front when i first got my bike.  I recently put the stock front back on since I am taking more rides that include freeway miles.  It only takes about 1/2 hour to swap them around and there is enough adjustment in the chain with either sprocket.
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agaduc996
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« Reply #6 on: July 06, 2009, 04:28:57 PM »

I went one down on my 996 and like Mario said I noticed that the increased rotation of the counter sprocket had  a cancellation effect on the earths gravitational pull.  I also went down one on the SS and my old monster.

Now I have heard, and I am no expert on this, that going down on you increase the wear on the counter sprocket quite a bit being that it is so small to start with. and there for will have to replace it and chain more often. I however have not noticed any big change on either the SS or 996. I did change the rear on the ST up 2 because it was a touring bike and I thought it was geared to low for the sport side of sport touring. And Again have heard that going up in the rear adds weight  to a already large rotating mass. At my level of riding I do not have to Be concerned with that. the easiest way for me to shed weight is to stop going to dunkin donuts. 

Maybe someone with a little technical knowledge on this could speak up and confirm or debunk any of these myths.   

Troy??

For now I am going to get a Boston cream and a Jelly Filled .
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2007 Multistrada 1100s
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Hedgehog
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« Reply #7 on: July 06, 2009, 04:34:12 PM »

Your biggest concern with reducing the countershaft sprocket by one should probably be your chain.  I've seen the result of one chain break on a Monster, and pictures of breakage on other bikes.  It's not a cheap repair.  If you don't already have one, consider getting a case saver from Chris Kelley.

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Hedge
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« Reply #8 on: July 06, 2009, 06:24:01 PM »

the gearing chart I looked at ended up with 1 down in the front being equal to 3 up in the back. so I went 2 up in the back. better bottom ed but for some reason I gained top speed too, I think because of the revs being more in the fat part of the poiwer curve. before topping it out meant it would try to flood on me about 115, not I can go 123 BUT that's without a rev limiter or a tach. it might go farther but that was enough for me and i got nervous.
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« Reply #9 on: July 06, 2009, 06:50:48 PM »

There is one more issue that I just thought of.  Be wary of using an even number of teeth on the rear sprocket.  The chain always has an even number, so paired with an even rear you can wind up with a chain that doesn't wear evenly and has tight spots.  Sure, the same will probably happen with an even (14) front, but I don't think it's much of a serious issue.

BTW, going down from 15 to 14 teeth on the front will increase the torque loading on the sprocket and chain by 7% at max load.  Whether that's enough to really cause a problem, I can't say.  By the same token, increasing the rear sprocket actually decreases the torque load on the sprocket and chain.
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Hedge
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« Reply #10 on: July 06, 2009, 06:54:44 PM »

don't think it's much of a serious issue.

  By the same token, increasing the rear sprocket actually decreases the torque load on the sprocket and chain.

After researching that, that's part of why I went +2 in the rear, good point hedge[thunbsup] plus I'm only like 300rpm higher according to the chart I seen at 60mph
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dziner996
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« Reply #11 on: July 08, 2009, 05:50:00 PM »

After carefully going over all the feedback, it looks like i'll go with a 15-39 and a few boston cremes.
 thanks for all the input
dan

00 996
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BryanS
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« Reply #12 on: July 09, 2009, 03:13:55 AM »

After carefully going over all the feedback, it looks like i'll go with a 15-39 and a few boston cremes.

Mario prefers Krispy Kreme 
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agaduc996
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« Reply #13 on: July 09, 2009, 04:52:42 AM »

Dunkin Donuts is the Starbucks of Boston. They are started there and are on almost every corner. I think I even saw a DD inside the bathroom of a DD. Now I am hungry again. Hey Mario do the Polizia sit around eating Zeppole all day??
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« Reply #14 on: July 09, 2009, 09:28:35 AM »

Nah.. zeppole is more of a treat for St. Joseph's day   
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2007 Red S4Rs 2008 Great Lakes Ducati Rally & Track Fest People's Choice Award Winner. 2014 Monster Challenge 3rd Place
2005 S2R Dark  2007 Ducati Day Daytona People's Choice Award Winner (sold)

"Must win track day".  Uncle Mofo Racing

Ducatiloo
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« Reply #15 on: July 10, 2009, 03:29:10 AM »

Minor threadjack.  Has anyone had issues with the case saver rubbing on the chain.
I bought one about 2 years ago and put it on when I dropped a tooth on my from sprocket.  I ended up taking it off because no matter how much I bent it the chain still touched.
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BryanS
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« Reply #16 on: July 10, 2009, 03:41:06 AM »

Mine fit perfectly
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