K11 Owners Group

ansobu · Joined: 26 Apr 2011 Posts: 10 Location: 43320

Hi all,

I just bought a 1993 K1100RS with 90k on the clock. It seems the only issue with the bike so far is that it appears the rear main oil seal is leaking. enough so that when I leave the lower fairing off for a night I find a small puddle of oil on the ground in the morning.

I plan on taking it apart myself, but would like to know of any other seals / gaskets I may want to replace when I have everything taken apart.

This will be my first big maintenance done on any of my bikes by myself, and Shoganai's thread has finally convinced me to take the big leap!
_________________
1993 K1100RS - 90K miles
1989 Honda Hawk GT NT650
1988 Suzuki Katana GSX1100F
1984 Honda Sabre VF700S

2xcelr8 · Posted: Thu Jun 09, 2011 10:13 pm Post subject: Water/Oil Pump

Are you sure it is the rear seal? Is it leaking out of the hole in the bottom of the bellhousing? I only ask as I would think a leak here would end up on the floor with or without the belly fairing in place. Could it be the oil pump seal? That usually coats the entire bottom of the motor and drips in the belly fairing. If you are replacing the rear main seal, you will be replacing the clutch o-ring while you are there. You will find wrenching on your own bike a good learning experience and very rewarding. Let us know if you run into problems.
_________________
Doug
'96 K1100RS, '94 K1100LT, '84 Honda VF700F Interceptor (4 sale)

Scott_Anderson · Posted: Fri Jun 10, 2011 2:52 am Post subject:

Another possibility could be the pan seal. Its only an rtv gasket seal and will leak with age.I redid mine on my '95 cause it was leaking.
_________________
Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

SugarHillCTD · Posted: Fri Jun 10, 2011 3:38 am Post subject:

All good info so far and probably what is causing your oil pool.

Another (remote?) possibility is what I found on my departed '93 K-RS

http://k11og.org/forum/viewtopic.php?t=8395&start=0&postdays=0&postorder=asc&highlight=groove

Good luck with the leak.

John
_________________
John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

ansobu · Joined: 26 Apr 2011 Posts: 10 Location: 43320

It is leaking from the little weep hole that Shoganai's was leaking from (right at the bell housing).

http://k11og.org/forum/viewtopic.php?t=5777&postdays=0&postorder=asc&start=90

I just had the pan off the other day when I changed the oil (didn't have a wrench for the filter the PO had in there) and cleaned all the surfaces around the oil pump / pan to make sure where / what was leaking. Pan gasket is holding with my RTV job and the oil pump isnt leaking at all.

Thanks for the heads up on the clutch o-ring, I had seen something about it before, but didn't know what should be replaced.[/url]
_________________
1993 K1100RS - 90K miles
1989 Honda Hawk GT NT650
1988 Suzuki Katana GSX1100F
1984 Honda Sabre VF700S

Shoganai · Posted: Fri Jun 10, 2011 10:38 am Post subject:

You'll a new clutch nut, O-ring and thrust washer.
Also the 6 bolts on the clutch housing.
They are all one time use.

Be SUPER dupper aware that the clutch assm. is a balanced unit. Use acetone or brake cleaner to clean three points around the clutch housing. Then use a permanent marker or white out to mark the housing and all near to that line parts.

While you are in there you'll find things you weren't expecting to replace as with all projects of this scope.

You can look at my thread and see that I had a local BMW shop replace the output shaft seal because I didn't want to buy the drift to seat it.
_________________
1993 K1100RS aka The Shop Whore
1994 K1100RS aka Blue Streak

The long road is a rainbow and the pot of gold lies there.
So slip the chain and I'm off again,
You'll find me everywhere. I'm a Rover. - JT

Nana korobi ya oki

Flying Duck · Posted: Fri Jun 10, 2011 12:30 pm Post subject:

If it's coming out of the weep hole and is motor oil then there's two places where it can leak: The rear main seal or the clutch nut O-ring. You need to open up the clutch to determine which one it is. If it's leaking inside the clutch hosing (big aluminum bucket) then it's the O-ring. If it's leaking where the drive shaft comes out of the block then it's the rear main seal.

99% of the time the problem is that the O-ring has dried out and cracked. Why people insist upon replacing the rear main seal too is beyond me. JMHO but that's wasting extra time, effort and money to fix something that ain't broke.

I've seen many a bad O-ring but never a bad rear main seal.

If it's coming out of the weep hole and is gear oil then it's either the tranny input shaft seal or the small seal at the back of the clutch pushrod. If the pushrod is wet with gear oil then it's the rear one.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE

E T · Posted: Sat Jun 11, 2011 11:47 pm Post subject:

You could always put a HARLEY-DAVIDSON name plate on it, then chalk it off to normal.. Shocked

_________________
1993 K1100LT
2005 Honda VTX 1300c---Passed

TMCKRS4V · Posted: Sun Jun 12, 2011 11:43 am Post subject: 90K Paralever..

Do a close inspection of your front U Joint. Mine failed at 90,000. I was told this was not uncommon. This event precipitated a R&R transmission. (Not much fun.)
Learn about the recipies of the straight Honda Moly 60 vs Paul Glaves Wurth blend, Phasing the d/s. R&R the cluthch while you are there.

-Recently took a 400mi spin on a S1000RR and caused me to reflect on the simple virtue of a chain drive.
-Just sayin...
Good Luck!
_________________
Tom Connolly

91 K100RS4V

Novato, CA

MOA / BMW NorCal / AMA

Flying Duck · Posted: Sun Jun 12, 2011 1:47 pm Post subject: Re: 90K Paralever..

mnb · Posted: Sun Jun 12, 2011 3:09 pm Post subject:

BobZ(IL) · Posted: Mon Jun 13, 2011 7:45 am Post subject:

tibbe · Posted: Tue Jun 14, 2011 4:39 pm Post subject:

Hi

Got oil on the left side of the bellhouse but none underneath.
Thought it was the rear main seal of the engine as it tasted oil but as I took the gearbox out it was rel. dry inside the beelhouse.
Seems to been the oilring of the starter thats leaking.

Will replace the starter oilring but the Q are should I replace the selaing of the gearbox input shaft ( did it 2 y ago ). Will replace the sealing ring at the enginge outputshaft and should I replace the main sealing of the engine output shaft. ?

PS. it's a -94 K11LT with 120.000 km ( appr. 75 k mls ).

/Sven-Erik

whyoldbill · Posted: Tue Jun 14, 2011 5:03 pm Post subject:

SugarHillCTD · Posted: Tue Jun 14, 2011 7:00 pm Post subject:

Mystic Red · Posted: Tue Jun 14, 2011 9:46 pm Post subject:

ansobu · Joined: 26 Apr 2011 Posts: 10 Location: 43320

Scott_Anderson · Posted: Mon Jul 04, 2011 2:58 pm Post subject:

Sounds like you may just need to replace the boot on the back of the transmission.
Not that expensive and easy to replace if you have it off of the bike.
_________________
Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

drikko · Posted: Mon Jul 04, 2011 4:43 pm Post subject: