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Discussion Starter #1
Hi

Just did half-termi and pciii on my 04 999. Looking to do the sprockets and new chain now. What do you guys think of this combo:

Ducati #968332AAA 525 Chain (Red)
Ducati #96824501B Z15 Sprocket Front
Ducati #96834403B T38 Sprocket Rear

Any experience with a 15/38 525 setup on a 999? What can I expect power delivery wise?

Thank you for your input.

Fly999
 

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Just go up 3 in the back, and you'll notice a considerable difference in power accessibility. I think the 04's are geared the same as the 05 (really tall!), so you'll should feel what i feel with this change. I have a 520 AFAM setup with a DID EV3 chain, and I'm quite happy with it.
 

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If 15/38 isn't stock, it's pretty dang close. I know the front is a 15 on the 999's. I say go up 4 in the back (leaving the 15 in the front). I went up three on my 749, and while it was a great improvement, it was not what I would call drastic and four would not have been too much.
 

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Discussion Starter #5
Hi,

I believe 15/36 is stock. So you recommend something like 15/39 or 15/40 instead of 15/38.

Anyone recommend a 520 instead of 525?

Thanks for your help guys,
 

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Fly999 said:
Hi,

I believe 15/36 is stock. So you recommend something like 15/39 or 15/40 instead of 15/38.

Anyone recommend a 520 instead of 525?

Thanks for your help guys,
I guess I shouldn't generalize as it really depends on if you're going to track out your bike and what the track layout is. I went with 15/39 and it seems to not be too outrageous on the streets (i.e. revving too high on the freeway) but definitely improved the track performance. I also went with a 520 and used the DID ERV3, which from what I hear is a really good chain.
 

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Discussion Starter #7
Thanks,

I was leaning towards the 15/38 to find a good compromise for a 90% street 10% track bike. Alot of my street/road riding is in slower twistier stuff but I do commute a little, hence the 38.

Sounds from what you guys have said that anything from 15/38 to 15/40 should work.

On materials, how much more wear out of a steel sprocket vs hardened aluminum?

Thanks
 

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Hardend Aluminum wears pretty good. Personally, that's what I like.
Sounds like your gearing choice (up two) will work fine. It's a pretty small difference, up two or up three.
 

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If you do a lot long distance riding 15/38 is pretty good. But if you do mostly twisties, then I would try 39 or even 40. Also, if you looking for STM rear sprockets, let me know. I have some in stock.

sloduck
 

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sloduck said:
If you do a lot long distance riding 15/38 is pretty good. But if you do mostly twisties, then I would try 39 or even 40. Also, if you looking for STM rear sprockets, let me know. I have some in stock.

sloduck
Hi sloduck, I'm looking for a 38 for my 06 999, which I figure is the biggest I can get on there with my stock chain, yes? I'll use this ratio for now while the bike is brand new - maybe I'll go bigger and do the full 520 conversion after I put a few thousand miles on the stock chain. Anyway, let me know if you have the 38.

Thanks,
Dan
 

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Out of interest, I hear of people changing from 525 to 520 chain/sprocket, just how much weight does that save? & how much quicker does it wear out? :)
 

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2004 sprocket size

I'm running a 14 front 38 rear with the stock 525 chain. When thats gone I'll go to a 520 with the same set up
 

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Discussion Starter #13
Hi,

Just bought new sprockets and chain for the 04 999. This is the setup that I went with:

Front : 96839502B (15 tooth, lightweight, 6mm for 04 999) <=== $45.35

Rear : 96835303B (40 tooth, lightweight, 6mm for 04 999) <=== $102.95

Chain : Chain: 968331AAA (520 pitch Ducati chain) <=== $211.25

Getting it installed prior to my trip to the Dragon - I'll let you know how it feels.
 

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For a streetbike, I would stay with the 525. How about a 525 with an aluminum rear to save weight? I don't think the 520 with an aluminum sprocket will give many people the kind of life they would like. 520 with aluminum rear is cool for a race bike though. I don't know what will last longer, the all steel 520 or the aluminum 525. Both are about the same weight I would guess.
 
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