Broken off gear teeth?

Just changed the oil and these little fellows dropped out of the sump
I only have the bike a couple of months and don't know it's history but it's been running well for me.
What do ye think they are off and how worried should i be?
The bike is a 99 curvy, 21,000 miles, displaying no symptoms of gear trouble or weird noises...

[yorkie_chris]

Put it next to a pound coin for f##ks sake

The angular edges suggest gear teeth rather than dog teeth to me. If it's running alright then it's a problematic one. Engine strip is very labour intensive to replace parts or even just to fish all the other bits of loose metal out.

I can't remember which gears have the small notches showing in the center of teeth, I'll have a look in the morning.

Are the unbroken edges the same in section?

Would they be of the teeth on the back of the clutch basket you think Chris?

[yorkie_chris]

Sprag gear. Possibly, also likely to break if engine kicks back due to a weak starter.

[Luckypants]

That looks suspiciously like what happened to Richie nonumbers last year....

Will try to find his thread.....

EDIT: ohhh lookit http://forums.sv650.org/showthread.p...r+teeth&page=4 - this has notches in the broken bits to.

[yorkie_chris]

Ouch. I fear the gearbox may be badgered then.

Done a bit of stripping after work and found the problem behind the alternator cover.
Anyone ever seen this before or have any idea how this could have happened?

not been pressing the starter by accident once the engine's running ? could jar the starter gear ring and stress the teeth as it engages slowly as the ring is going round fast as the engine is running ?

Could also just be stress on the teeth, due to the loading during normal starting - stress related failure ?

looks like it won't be such a bad job to fix though - broken teeth tend to come off in 1 chunk, so quite likely if you can fish the bits out of the bottom you'll be ok to run when the toothless bits have been replaced as there shouldn't be any other debris in there

Lucky ...

Spokey

[yorkie_chris]

But the gears aren't rotating when engine's running, well only by drag not properly spinning. Starter kickback?

take small starter gear out.check case where pin in middle of gear fits in case,make sure it is not broken.while there turn teethless gear by hand and see if it spins freely.it will only spin in one direction.
if no problem found replace both gears.