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39 T Rear Sprocket?


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#1 didac958

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Posted 01 March 2011 - 11:20 AM

Hello,

I was wondering how many people went +1 on the rear of a 1x98. 848 already have a 39 T from the factory.

I had an 848 with a 14 T front and I really liked it. Now that I am getting an 1198 I was thinking of swapping the rear sprocket instead. I was playing around with that sprocket website and +1 on the rear (15 - 39) yields a gear ratio that is in between the stock gearing (15 - 38) and going with a 14 T again (14 - 38).

Any feedback would be greatly appreciated!

Thanks

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#2 TC996

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Posted 01 March 2011 - 01:49 PM

Have to keep an eye on the tire to swing arm clearance with 15/39 gearing on a 1198.

#3 Hawkeye

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Posted 01 March 2011 - 03:50 PM

TC996 said:

Have to keep an eye on the tire to swing arm clearance with 15/39 gearing on a 1198.

+1. It didn't work for me. I now have scrape marks on the weld on the inner swingarm where the center of the tire rubbed against it (190/55 Pirelli SC2). You'd need at least 8mm of clearance to allow for tire "growth" at speed, plus a properly adjusted chain. I have a near new Afam 39 tooth sprocket on the shelf as a result......

#4 didac958

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Posted 01 March 2011 - 05:47 PM

What would be the best way to deal with that? Add a few links and move the eccentric back?

#5 Duc_dreamin

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Posted 01 March 2011 - 06:49 PM

Hawkeye said:

+1. It didn't work for me. I now have scrape marks on the weld on the inner swingarm where the center of the tire rubbed against it (190/55 Pirelli SC2). You'd need at least 8mm of clearance to allow for tire "growth" at speed, plus a properly adjusted chain. I have a near new Afam 39 tooth sprocket on the shelf as a result......

Did you go back to stock gearing or -1 in the front? I'm looking at a 15/39 setup but might be adjusting if this is an issue.

#6 TC996

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Posted 01 March 2011 - 07:04 PM

I tried 14/38 on my 1198 and thought this gearing was too short for my preference. I have been using 14/37 since last July and have been happy with it. There is 10-12mm clearance between tire and swing arm with Pilot Pure 195/55-17.

#7 didac958

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Posted 01 March 2011 - 07:39 PM

TC996 said:

I tried 14/38 on my 1198 and thought this gearing was too short for my preference. I have been using 14/37 since last July and have been happy with it. There is 10-12mm clearance between tire and swing arm with Pilot Pure 195/55-17.


Did you convert to 14 front, or did you buy it like that? Because if 14 - 38 was too short, why not going stock?

#8 TC996

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Posted 01 March 2011 - 07:46 PM

didac958 said:

Did you convert to 14 front, or did you buy it like that? Because if 14 - 38 was too short, why not going stock?

I installed the 14 front sprocket. It makes taking off from a standing stop ultra smooth but found myself having to shift gears to much like a 600cc inline-4 bike and not taking advantage of the 1198's torque. The stock gearing was too tall for my preference. 14/37 is between the two and has good tire to swing arm clearance. If clearance wasn't an issue, I would have gone +1 or +2 rear only.

#9 Hawkeye

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Posted 02 March 2011 - 01:32 AM

Duc_dreamin said:

Did you go back to stock gearing or -1 in the front? I'm looking at a 15/39 setup but might be adjusting if this is an issue.

No, I went to 14/38 (one down in front) and stayed that way. 15/39 was my first choice but we know how that turned out.

It can get ugly too, though the actual cause hasn't been determined:

http://www.ducati-su...ance#post279579
“If you are not moving at the speed of the marketplace you’re already dead, you just haven’t stopped breathing yet.” Jack Welch

#10 Hawkeye

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Posted 02 March 2011 - 01:50 AM

didac958 said:

What would be the best way to deal with that? Add a few links and move the eccentric back?

There was an extensive thread about this back in June last year:

http://www.ducati-su...highlight=tooth

#11 JeffKoch

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Posted 02 March 2011 - 07:24 AM

Going to a 14 front is simple, no clearance issues - that's the way my 1098 is set up right now. I'd prefer to go to a 14/40 with a longer chain if there are no issues - 2nd is still to tall for many turns on my favorite local roads.
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#12 didac958

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Posted 03 March 2011 - 10:32 AM

Thanks for the input guys. I think I have enough to make a good gearing decision.

#13 JeffKoch

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Posted 03 March 2011 - 07:31 PM

JeffKoch said:

Going to a 14 front is simple, no clearance issues - that's the way my 1098 is set up right now. I'd prefer to go to a 14/40 with a longer chain if there are no issues - 2nd is still to tall for many turns on my favorite local roads.

Hmm, I can't seem to find a 1098 rear sprocket larger than a 39 - anyone have any links?
'08 Ducati 1098S, '98 Ducati 748/800 street, '99 Ducati 996 race

#14 PhilDucati

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Posted 03 March 2011 - 08:51 PM

I am up grade my chain and rear sprocket if you guys interest to buy 520 EVR3 98 link and Afam 39 for 848 quick change sprocket let me know.

#15 didac958

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Posted 04 March 2011 - 05:34 AM

JeffKoch said:

Hmm, I can't seem to find a 1098 rear sprocket larger than a 39 - anyone have any links?

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