Paranoid or going to be busy?

[mozzup]

Hi I may have overfilled the bike (1150 w) with oil a teensy bit. Am now paranoid I've blown output shaft seal. There's a bit of oil on case joint (as per image). Is it leaking? is the clutch gonna slip - am I just being a ninny (usually the case) - thanks

 

[sockpuppet]

When you say overfilled how much by?

 

[Stewart H]

If you take the starter motor off you can see what is going on in there and perhaps see what is going on.
Stewart

 

[mozzup]

When you say overfilled how much by?

Only couple of CC's tops. Level was in sightglass after waiting 10mins to cool down, but when totally cold in morning - just over?

 

[John Armstrong]

Only couple of CC's tops. Level was in sightglass after waiting 10mins to cool down, but when totally cold in morning - just over?

How can you see if it's just over the sight glass

If it's only a few cc then should be ok, hopefully.

 

[mozzup]

How can you see if it's just over the sight glass

leant bike over and waited for it to reappear, didn't have to lean too far.

 

[MattW]

Remove the airbox drain bung and see what comes out.

I've never heard of a slight (or even large) overfill blowing past a crank seal - it usually just ends up being shunted down the breather into the airbox.

 

[Steptoe]

When you fill an 1100/1150 engine with the specified amount it fills the oil sight glass.

 

[davegs]

paranoid

put it on E-Bay quick! (I'll give you a tenner for it).
dave GS

 

[mozzup]

put it on E-Bay quick! (I'll give you a tenner for it).
dave GS

O come on, you offered £20 to the last schmuck!

 

[dancata]

I know someone that made an oil change himself: got out .5 L of th old one, then put in 3.5L of new oil, that totals a 6.5L of oil in a boxer . Ran the bike for 1 year with that much oil inside it, but nu rear main seal failure; when I opened the screw in the airbox, 1L of it came out. Oilglass level was dark no matter how much you lean the bike on the right side

 

[mozzup]

I've never heard of a slight (or even large) overfill blowing past a crank seal - it usually just ends up being shunted down the breather into the airbox.

Sorry, but read of a few cases reported on here?

I read them and panicked a bit - A little knowledge and all that - Mind you still might have gone, do you often see oil down the casing seams?

 

[MattW]

Sorry, but read of a few cases reported on here?

I read them and panicked a bit - A little knowledge and all that - Mind you still might have gone, do you often see oil down the casing seams?

If I read the picture right, we're looking at a vertical section of casing in front of and above the RH throttle body? Oil would have to leak up hill inside the bellhousing to get there (ok - I guess it could be thrown by the clutch but I think you'd have noticed a trashed clutch if that happened). It's hard to tell but it looks to me as if something has dripped onto this location from above and then run downwards slightly - are you sure it's engine oil and not petrol, ACF 50 or some other gunk that's got there from above (say when you last washed it)? Looks a bit like a petrol stain to me, although if you've tried to clean it off then possibly not...

Have you checked the airbox bung yet?

If you're feeling really paranoid then remove the starter motor and peer inside the bellhousing with a torch but I would be amazed if a slight overfill cased a crankshaft seal failure - if the clutch is working fine, just drop a little oil and ride it.

 

[mozzup]

If I read the picture right, we're looking at a vertical section of casing in front of and above the RH throttle body? Oil would have to leak up hill inside the bellhousing to get there (ok - I guess it could be thrown by the clutch but I think you'd have noticed a trashed clutch if that happened).

Have you checked the airbox bung yet?

If you're feeling really paranoid then remove the starter motor and peer inside the bellhousing with a torch but I would be amazed if a slight overfill cased a crankshaft seal failure - if the clutch is working fine, just drop a little oil and ride it.

Thanks Matt, yep that's the spot, I imagined (last night whilst trying to get to sleep ) that oil had been thrown up and around bellhousing. Not taken off bung, but changed airfilter yesterday and didn't see any oil swishing around down below, but will check bung, clean off casing, and see what appertains.

 

[Stewart H]

I saw an 1100 with just the same oily mark in that spot, I reckoned it had been there for some time, no other issues. obviously its oily stuff but it would take time and miles for it to work its way around the flywheel and contaminate the clutch.
Stewart

 

[davegs]

E.Bay

O come on, you offered £20 to the last schmuck!

Times are hard!

 

[mozzup]

Have you checked the airbox bung yet?

Took out airbox bung, bit of clear oil on bung but not dripping out? Just did valve clearances - took out timing hole bung and all seemed dry behind there (but it would anyway would it?), relaxing a tad now.

 

[MattW]

Took out airbox bung, bit of clear oil on bung but not dripping out? Just did valve clearances - took out timing hole bung and all seemed dry behind there (but it would anyway would it?), relaxing a tad now.

Cool

 

[Wrigsby1]

In my experience R11's tend to a bit more leaky. The gearbox/bellhousing joint is assembled dry and the seal on the back of the crank is only a single (1150's have 2). If there is a small weep it seems to go across the back of the flywheel in the full 360 deg so you can get weep at any angle. Mine didn't affect clutch and I have only got around to doing it due to the gearbox going AWOL.
The gearbox input seal seems to be the one that buggers up the clutch the most unless you have a fully blown crank seal. Dealers are also prone to overfilling and i received a previous 11Gs back smoking like a stroker!

Fill to half way up the window and ride and/or leave to get a real idea if the level. The boxers are really pretty bullet proof. I used to work in sales for a dealer and that's why I now do all my own servicing, aha...

Cheers
G

 

[littleredrooster]

Adding a little too much oil does NOT blow random seals. It is an urban myth. If someone can explain to me why more oil equals disaster, I will happily buy them a beer.




However..........the picture shows a typical 11xx with a leaky seal. The clutch flings it about, but it is usually the gearbox seal, not the back crank seal. The only outward indication is the oil-mist stain between engine and box. Wipe some off and smell it - gear oil has a very distinctive whiff.
Seal and clutch replacement are the only answer, but it may take a while to 'develop'.