Not much tech, but I thought I would share with everyone what I found yesterday when looking over the scoot (winter inspection/modification).
Anyone else experience this?
(http://farm5.static.flickr.com/4034/4251250998_63a1d3eec2_o.jpg)
On another note; the stock gearing is 15/38 and I am currently running 15/40. I am thinking about going with 14/40 since I did not ride on the interstate once this last season and I rarely get the bike into 5th as it is. Any issues with the shorter gearing other than shifting more often?
Check your chain for tight spots. Broken sprocket teeth generally means bad chain wear like tight spots or loose/broken links. I'd say you're due for a new chain along with that sprocket. If you really want to, you can continue to ride on that but if you don't have to you shouldn't. Don't listen to tunes while you ride, though, and when you're taking off from a stop listen for a pop. If you hear one, it means you broke another tooth.
Another thing, that muck looks kinda liquidy. Did you spray cleaner in there before taking the picture? If not, I'd check for an oil leak.
Some people have noted extra chain wear from doing the 14 front because it puts the chains closer tot he swing arm. Others haven't noticed it at all. *shrug*
Also, your rubber booty to keep dirt/grime out of the slave cylinder has expired. Either replace your slave cylinder w/a newer style aftermarket unit for better feel and lighter effort, or get a new rubber booty if you're OK w/the lever effort and clutch feel.
The chain looks new enough same w/the sprocket from the angle of the photo... so maybe a defective sprocket?!? It would be the first I've seen (other than did not fit on the output shaft) but could be...
+1 on the grime comment above. Clean it up and then see what you've got going on in there.
Quote from: erkishhorde on January 06, 2010, 09:18:12 AM
Check your chain for tight spots. Broken sprocket teeth generally means bad chain wear like tight spots or loose/broken links. I'd say you're due for a new chain along with that sprocket. If you really want to, you can continue to ride on that but if you don't have to you shouldn't. Don't listen to tunes while you ride, though, and when you're taking off from a stop listen for a pop. If you hear one, it means you broke another tooth.
I should have said that the chain is in excellent shape as is the rear sprocket and rest of the 14 teeth on the front. It just looks like the front tooth just let go. I have never seen this before (I have been riding for 14 years and have only ever owned chain drive bikes). This is my first Ducati so that is why I posted this question.
QuoteAnother thing, that muck looks kinda liquidy. Did you spray cleaner in there before taking the picture? If not, I'd check for an oil leak.
I did just lube the chain as part of my winter maintenance. That is how I discovered this. Also, I did spray cleaner in there to get rid of the built up chain junk.
QuoteSome people have noted extra chain wear from doing the 14 front because it puts the chains closer tot he swing arm. Others haven't noticed it at all. *shrug*
I always prefer adding teeth to the rear, but the chain and rear sprocket is still in good shape.
Quote from: Duck-Stew on January 06, 2010, 09:31:17 AM
Also, your rubber booty to keep dirt/grime out of the slave cylinder has expired. Either replace your slave cylinder w/a newer style aftermarket unit for better feel and lighter effort, or get a new rubber booty if you're OK w/the lever effort and clutch feel.
Yes, I noticed that too. It is on the list along with a new front sprocket. Actually, I haven't noticed an issue with the stock slave yet, but I do not have to deal with stop and go traffic in my daily life.
QuoteThe chain looks new enough same w/the sprocket from the angle of the photo... so maybe a defective sprocket?!? It would be the first I've seen (other than did not fit on the output shaft) but could be...
This is my thought and the first I have ever had.
Is it possible you get a rock kicked up into it and that's what broke the tooth?
Ah, I was wondering what that thing was in the top muck that contacted the chain. Since you're digging around in there anyway, now is as a good of a time as any to put in a case saver. It helps keep some of the muck away from the slave too.
Quote from: NAKID on January 06, 2010, 10:22:52 AM
Is it possible you get a rock kicked up into it and that's what broke the tooth?
I guess it is possible, but I had the sprocket cover on all season.
I would think it would be hard for rock to get in there?
Quote from: erkishhorde on January 06, 2010, 10:37:25 AM
Ah, I was wondering what that thing was in the top muck that contacted the chain. Since you're digging around in there anyway, now is as a good of a time as any to put in a case saver. It helps keep some of the muck away from the slave too.
Yeah, I saw those on the CA-Cycle Works website. I am going to pick one up. On another bike I had, the chain snapped and the case saver saved the clutch pushrod and cases.
Maybe front and rear sprocket aren't aligned?
Gee, Blue, so you have a 14 tooth sprocket that won't wear on the swingarm!
I'd say that broken tooth was from a rock or other debris.
Check the inside of your chain for damage, if something got pinched in there hard enough to break that tooth, it might have damaged the chain as well.
Is it just me, or does it look like the "teeth" inside the sprocket do not connect to the grooves correctly (I'm not sure that's what they are called, but...) Are they eating their way into where they shouldn't be?
No, it's fine, stopintime. The splined plate is there to lock the sprocket from coming out. So the teeth should hit the splines in the sprocket. What you do not see is the groove where the spline plate sits. You insert the plate until it seats in the groove, then rotate it until the teeth are caught by the splines, securing the sprocket (in the in-out direction), then you make the assembly solid with the two bolts.
Quote from: battlecry on January 06, 2010, 02:13:33 PM
No, it's fine, stopintime. The splined plate is there to lock the sprocket from coming out. So the teeth should hit the splines in the sprocket. What you do not see is the groove where the spline plate sits. You insert the plate until it seats in the groove, then rotate it until the teeth are caught by the splines, securing the sprocket (in the in-out direction), then you make the assembly solid with the two bolts.
It has been a good day for me and now it's completed with new knowledge [thumbsup]
I took the sprocket off and cleaned it up a bit. The chain rollers look great except for three that had a scuff on them. Nothing major, but not looking like the rest. I also cleaned up the sprocket housing and it appears to be the junk of 19000 miles without being cleaned. It is cleaning up nicely now. The sprockets were aligned correctly, but I did bike this bike this spring with the chain and sprockets on them so who knows the full story. The previous owner was a good guy, bought it brand new, had the bike serviced by a reputable bike shop and gave me a nice stack of receipts. I could see where a bike shop might think he knew more about the scoots than he let on (after talking bikes with him). Anyway, last question: is this the stock front sprocket or aftermarket?
(http://farm3.static.flickr.com/2602/4251908389_eac9b16777_o.jpg)
(http://farm5.static.flickr.com/4069/4251907809_b9eb3919a0_o.jpg)
(http://farm5.static.flickr.com/4070/4252678726_e30bc9783a_o.jpg)
rotation of sprocket ======>
That's an OEM style sprocket, I think it's an AFAM.
I'm pretty sure your bike takes a somewhat oddball sprocket, no 'offset' to it.
Be aware of that when ordering/buying a replacement.
That last pic shows a nick on the tooth just to the left of the broken tooth. Furthers my belief that something got between the tooth and chain...
Quote from: Speeddog on January 06, 2010, 03:48:34 PM
That's an OEM style sprocket, I think it's an AFAM.
I'm pretty sure your bike takes a somewhat oddball sprocket, no 'offset' to it.
Be aware of that when ordering/buying a replacement.
Thanks for the information. The sprocket appears to be "stepped out" the same on both sides.
Quote from: NAKID on January 06, 2010, 04:12:51 PM
That last pic shows a nick on the tooth just to the left of the broken tooth. Furthers my belief that something got between the tooth and chain...
There is also a nick on the preceding tooth that you cannot see in the pictures.
Crazy stuff!
The list grows for replacement parts.
had the same problem exept when i bough the bike i noticed there was two teeth missing in the front and the belt was WAYYYY loose and WAYYYY worn as well as both sprkets. didnt really notice any difference other then a pretty nice jerk (chain was soo messed up. almost all the o-rings were non existant). Kind of miss that beat up feel.
Quote from: Speeddog on January 06, 2010, 03:48:34 PM
...I'm pretty sure your bike takes a somewhat oddball sprocket, no 'offset' to it.
Be aware of that when ordering/buying a replacement.
Yes, I can confirm that. You need a different offset sprocket specific to the 900ie bikes.
i recently tried fixing a 14t sprocket (bought on ebay and according to the seller it's a ducati oem) on my bike (04 ducati monster s4r) with the old OEM chain that came with the bike (the old chain and the old 15t sprocket was fine). i found some really tight spots and loose spots on the chain, difference of about 1.5 inches in slag, so i blamed it on the old chain. i replaced the chain and still found some tight spots altho not as bad. when i ran the bike something doesn't quite feel right, vibration kind of feel at high speed. could it be the sprocket that's slightly out of shape??? i wrote back to the seller and he was really pissed off saying that i'd stand a better chance of winning the lottery than an oem ducati sprocket out of shape ???
now i've installed the old 15t sprocket back with the new chain.
thanks if anyone can advice.
If memory serves me right, the 2000 900S had a different offset on the front sprocket, but the others were the same.
Quote from: Fruity on January 11, 2010, 06:37:28 PM
i recently tried fixing a 14t sprocket (bought on ebay and according to the seller it's a ducati oem) on my bike (04 ducati monster s4r) with the old OEM chain that came with the bike (the old chain and the old 15t sprocket was fine). i found some really tight spots and loose spots on the chain, difference of about 1.5 inches in slag, so i blamed it on the old chain. i replaced the chain and still found some tight spots altho not as bad. when i ran the bike something doesn't quite feel right, vibration kind of feel at high speed. could it be the sprocket that's slightly out of shape??? i wrote back to the seller and he was really pissed off saying that i'd stand a better chance of winning the lottery than an oem ducati sprocket out of shape ???
now i've installed the old 15t sprocket back with the new chain.
thanks if anyone can advice.
I didn't know that there was an OEM 14T front sprocket. There could be a few reasons why the guy got pissed when you called him out. One could be that he's pushing crap products and got caught but he doesn't want to take the blame so he's trying to make you back down. Obviously no, you do not stand a better chance of winning the lottery than finding an OEM Ducati sprocket that is out of shape.
Quote from: Teutonics on January 11, 2010, 03:39:29 PM
Yes, I can confirm that. You need a different offset sprocket specific to the 900ie bikes.
Of course, I already ordered a new sprocket for the bike from Desmo Times (along with other replacement parts). There was no mention of the a special sprocket for my bike on the website. Below is a link to what I bought (sprocket "A"). Will this not fit? If not, is this a dealer only part?
Desmo Times' Steel Countershaft Sprockets - $27-$50 (http://desmotimes.com/product102a.htm)
Quote from: Blue on January 12, 2010, 08:09:22 AM
Of course, I already ordered a new sprocket for the bike from Desmo Times (along with other replacement parts). There was no mention of the a special sprocket for my bike on the website. Below is a link to what I bought (sprocket "A"). Will this not fit? If not, is this a dealer only part?
Desmo Times' Steel Countershaft Sprockets - $27-$50 (http://desmotimes.com/product102a.htm)
Don't think that I can answer your question, but here's something I found. I've always been a big fan of CA-cycleworks and they have the sprocket you bought for a few bucks cheaper. But they don't list the 900ie as one of the bikes it fits. Either that or it fits so many bikes that it went outside the bounds of the description box.
http://www.ca-cycleworks.com/shop/catalog/ducati/chain.html (http://www.ca-cycleworks.com/shop/catalog/ducati/chain.html)
IIRC both Desmotimes and CA-cycleworks are board sponsors so giving business to either one is [thumbsup]. Also, on the CA-cycleworks site, the sprocket for the 900ie is described as having an offset on both sides whereas the one on the Desmotimes site appears to only have an offset on one side. I can't tell you if that matters, though. Just pointing out what I noticed.
Looking at the CA-Cycleworks website, it appears as though I ordered the wrong sprocket for my monster from Desmo Times (they do not offer the sprocket I need on the site).
It looks like I have some emailing to do!
Thanks for taking the time to help me out.
Bah, you've got _miles_ of life left in that one!
(http://farm4.static.flickr.com/3117/2535181995_ff7524b213_m.jpg) (http://www.flickr.com/photos/bigiain/2535181995/in/set-72157594409276972/)
(click for a bigger version)
poor-maintenance-big
Well, I finally got all of the parts together along with the time to put everything back together.
Rubber Boot from Ducati Seattle
(http://farm3.static.flickr.com/2717/4281874509_9eb6200697_b.jpg)
Sprocket from California Cycle Works
(http://farm3.static.flickr.com/2743/4281877273_d7480eb47b_b.jpg)
Case saver from Desmo Times (along with other maintenance items). The rear tire is not installed; I have not adjusted the chain slack as of yet.
(http://farm5.static.flickr.com/4040/4282627512_407fa7a471_b.jpg)
I was a bit surprised with how the front sprocket was mounted and secured into place. I was amazed in how much the sprocket plate plays a role in holding the front sprocket in place but also for keeping the sprocket aligned. Are other Ducati's like this (not the newer ones with the big sprocket nut)?