I recently performed an oil change on my 2003 Monster 800S i.e. and found this piece of metal in my drain pan. It's about the size of a BB and is finished on all sides but where it fractured.
(http://i.imgur.com/Asmdt.jpg)
(http://i.imgur.com/zyHGn.jpg)
(http://i.imgur.com/dbPFZ.jpg)
(http://i.imgur.com/BS8V1.jpg)
Sorry for the poor photo quality. As you can see the piece is rounded, flat on one side and slightly beveled on the other. How alarmed do I need to be with this? Does anybody have any idea what it could be from? I'm due for a valve adjustment here in about 800 miles and would like to wait until then to have this looked at by a mechanic (if it can wait). Any advice is appreciated.
-wt6
Steel?
Aluminum?
I knew I should have paid more attention in my strength of materials class in college...
I can't really say for sure if it's steel or aluminum. If I scratch some of the carbon off of the fractured face it's shiny, which would lead me to think aluminum.
huh. gotta be aluminum or it would have stuck to the drain plug.
more clear pics might help too. very odd.
Attempt at new photos. I might have to go borrow a friend's DSLR to get better macro photos.
(http://i.imgur.com/6whwj.jpg)
(http://i.imgur.com/v2TVb.jpg)
(http://i.imgur.com/G9TFk.jpg)
Cheers,
wt6
Quote from: whiskeytango6 on February 15, 2012, 11:57:34 AM
I knew I should have paid more attention in my strength of materials class in college...
I can't really say for sure if it's steel or aluminum. If I scratch some of the carbon off of the fractured face it's shiny, which would lead me to think aluminum.
Check it with a magnet. I cant picture a part that could come from.
Quote from: whiskeytango6 on February 15, 2012, 12:24:55 PM
(http://i.imgur.com/G9TFk.jpg)
Cheers,
wt6
whatever it is, it's cast. look at the metal grain on the bottom.
case, covers. $10 says it's aluminum
I'm not betting. I need the ten bucks more than you do ;D
Quote from: howie on February 15, 2012, 10:52:58 PM
I'm not betting. I need the ten bucks more than you do ;D
unless something has changed, the drain plug has a magnet on it. i think it would have picked that up if it was ferric
I just tested it with a refrigerator magnet and it is indeed magnetic. No idea why the magnet on the drain plug wouldn't have grabbed it.
Shifter pawl? Does the bike still shift the same?
Looks like a tooth of a gear snapped to me ....
I haven't noticed any differences in shifting. Also, I agree that it looks like the tooth of a gear, but the question is from where and how concerned do I need to be?
I'd be very concerned ... but I tend to panic a lot when stuff is coming off things I ride ;D
It sure looks like the end of an oil bypass spring. Item #14 from pic below.
http://www.ducatimcparts.com/images/parts/ducati/fullsize/M800S_USA_2003026.jpg (http://www.ducatimcparts.com/images/parts/ducati/fullsize/M800S_USA_2003026.jpg)
It's hard to tell from the photos, but the shorter edge where it fractured is starting to curve out just like the other side. Meaning it is symmetrical and not curved like the oil bypass spring in the photo.
Quote from: whiskeytango6 on February 16, 2012, 06:37:43 AM
I haven't noticed any differences in shifting. Also, I agree that it looks like the tooth of a gear, but the question is from where and how concerned do I need to be?
are there any round-toothed gears on the bike? not in the gearbox for sure.
I am shocked it's magnetic.
Some of the 800's have had issues with the clutch spring-damper hub coming apart.
I've not seen one of those clutches in quite a while, so I don't clearly remember what they look like.
Quote from: Speeddog on February 16, 2012, 08:57:38 AM
Some of the 800's have had issues with the clutch spring-damper hub coming apart.
I've not seen one of those clutches in quite a while, so I don't clearly remember what they look like.
M/SS800 or S2r800?
Mine is a M800S. Here is an exploded view of the clutch.
http://www.ducatimcparts.com/images/parts/ducati/fullsize/M800S_USA_2003016.jpg (http://www.ducatimcparts.com/images/parts/ducati/fullsize/M800S_USA_2003016.jpg)
Quote from: ducatiz on February 16, 2012, 10:27:39 AM
M/SS800 or S2r800?
This is the one I remember:
S2R800 - http://www.ducatimonsterforum.org/index.php?topic=24411.0 (http://www.ducatimonsterforum.org/index.php?topic=24411.0)
M800 doesn't have the APTC clutch, so it *may* not have the spring damper arrangement.
Can't tell from the parts diagram.
Quote from: Speeddog on February 16, 2012, 11:40:04 AM
This is the one I remember:
S2R800 - http://www.ducatimonsterforum.org/index.php?topic=24411.0 (http://www.ducatimonsterforum.org/index.php?topic=24411.0)
M800 doesn't have the APTC clutch, so it *may* not have the spring damper arrangement.
Can't tell from the parts diagram.
That's why I asked. M/SS800 has the same clutch as the M750, no dampers that I know of.
I'd say it looks like it broke from the gear on the right. It is from the clutch/case fail thread Speeddog referenced.
(http://www.ukmonster.co.uk/monster/attachment.php?attachmentid=13224&d=1255171205)
I checked my S2R 800 dual mass primary gear - the picture does not show a part from it.
The oil bypass spring is stamped and pretty thin...or they always were.
Quote from: supperduc on February 16, 2012, 07:39:35 AM
It sure looks like the end of an oil bypass spring. Item #14 from pic below.
http://www.ducatimcparts.com/images/parts/ducati/fullsize/M800S_USA_2003026.jpg (http://www.ducatimcparts.com/images/parts/ducati/fullsize/M800S_USA_2003026.jpg)
Quote from: battlecry on February 16, 2012, 12:46:05 PM
I'd say it looks like it broke from the gear on the right. It is from the clutch/case fail thread Speeddog referenced.
Isn't the gear on the right the crankshaft gear? And I'm no mechanic, but isn't it pretty beefy?
Quote from: whiskeytango6 on February 17, 2012, 06:59:30 AM
Isn't the gear on the right the crankshaft gear? And I'm no mechanic, but isn't it pretty beefy?
none of the gears have rounded teeth like that. the top of the tooth on all the engine gears is flat and meshes with the opposing gear. i have a gearbox at home in a box, i can take photos.