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Discussion Starter #1
I'm posting this XT200 issue in the TW area because it may be something for you too watch out for in the future. I've not seen this happen nor remember hearing it here on the forum.

Got back from a ride and Squirrel was bleeding.


Removed the necessary pieces for inspection and this is what I found. The sprocket oil seal had slipped out of the engine case. For picture reasons I placed it back on the sprocket shaft but this is very similar to what it looked like when I removed the sprocket. I had also cleaned the seal so it looks good in the picture.


...and this is what's behind door #1. Or should I say oil seal #1. Still had oil in the engine but I'll change the oil or whats left of it just to make sure there isn't any/much metal from lack of oil. Engine was still running strong when I got home.


On the positive side my chain was well lubed. Who needs a Scott Oiler System anyway.
 

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Guess I'll be the first to ask... what's with that hammer? :)
 

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Sucks but your diving in and all over it. If you don’t think you’re too far along maybe you can turn this into a Tech. Video and post it. Could be most helpful to another squirrel killer down the road. Good luck
 

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Discussion Starter #8
how is the bearing? any slop? is the crank case breather clean and working? back pressure might have pushed the seal out
Good idea, I’ll have to check that out. Kinda wondering what would cause a seal to basically just fall out. Perhaps it had help as you suggest. Thanks Greg.
 

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Discussion Starter #9
Sucks but your diving in and all over it. If you don’t think you’re too far along maybe you can turn this into a Tech. Video and post it. Could be most helpful to another squirrel killer down the road. Good luck
Already taken to far apart. My thought before I took it apart was just a worn seal and how difficult it would be to remove the old seal. Guess I don’t have to worry about the removal part.
 

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My guess is who ever put the seal in did a half a$$ job and it just vibrated out.

If the new seal goes in hard, as in with the usual amount of resistance, it should all be OK. I don't see "blow by" knocking the seal out if it were the correct seal installed correctly. Does the shift shaft seal look good? That seal is also subjected to the same pressures.
 

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I hate seals. They steal your bait. I'm happy when sharks eat 'em.
Oh! Them kinda seals, duh! Should've stayed at a Holiday Inn Express last night. Guess I'll go have a V8.
 

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Discussion Starter #14
how is the bearing? any slop? is the crank case breather clean and working? back pressure might have pushed the seal out
Update: The breather tube and air-box were free of obstructions so a clogged breather tube wasn't the problem. Without tearing the engine apart, as far as I can tell the bearing seems fine with no noticeable slop or free play.

Have replaced the seal and will test ride it tomorrow. Still, it's a weird deal with no obvious cause unless it's like a cow whose had a bunch of calves and it just fell out! I dunno know!
 

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Aaaah, Admiral must have been a cattleman in a former life.:rolleyes:
 
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