K11 Owners Group

[CrashBar]

2 questions:

1 - my one clutch plate has a broken spring. I markred both plates at removal so I could re-install the same way to maintain the factory balance. If I replace that plate how do I ensure I am balanced? If I am replacing one should I just replace both ($ notwithstanding) - again same balance isssue.



2 - I've read a lot about installing a new main seal. How do I get the old one out? Any tricks? The seal *is* the thing marked 50-80-10, right?


CB
_________________
1993 K1100LT (116,000 miles and counting)
1973 Honda CB350F
1978 Honda CB550K
1973 Triumph TR5T

[Scott_Anderson]

[CrashBar]

Thanks. I just ordered *all* the parts I need, although I'm sure I missed something. Spring is still 6 weeks away.
_________________
1993 K1100LT (116,000 miles and counting)
1973 Honda CB350F
1978 Honda CB550K
1973 Triumph TR5T

[malcolmt]

That is a good decision to change all. A couple of years ago the O ring behind the clutch basket started to leak, oil got on the clutch plate and it slipped like crazy.
I changed only the friction plate as the was ol rather than wear which caused the slipping. It was a poor decision.
Twelve months after that it started to slip again. When it was stripped I found the fwear on the clutch plates cause the friction plate to barely make contact.
I replaced to lot, what a difference it made, the clutch is now perfect and the bike has almost no vibes like my K75.

Malcolm(t)
Joburg
South Africa.
_________________
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A Bike on the road is worth two
in the shed
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[Scott_Anderson]

CB, make a mental note of where the engine oil level is in the sight glass.
If the level is at the center you will leak some out when you pull the seal out.
You may be due for an oil change anyway, or not, just don't be alarmed when it comes running out.
_________________
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]

Oh, yeah- You are going to change the clutch nut O-ring, right? Mine was the cause of the clutch slip and it was hard as a rock when I went to replace it.
_________________
John & Cathy

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

[old guy old bike]

+1 on the o-ring. Don't forget to leave the new seal proud by .5mm (.020").
A buddy of mine works at a GM garage and he borrowed a seal installer tool. He didn't know what it was for, just that it fit the seal. I gave him the old one for fitting.

A little ladies foot takes the old seal out without damage to the case or bearing behind it.
Jeff
_________________
1993 K1100LT
2003 K1200GT Gone but not forgotten
2014 Victory Crossraods

[Flying Duck]

It's my understanding (though I could be wrong) that the clutch housing (big aluminum thing) is balanced separately and that the pressure plates are balanced as a pair.

I've seen a lot of clutches and never found a balancing mark.
_________________
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

[Scott_Anderson]

[malcolmt]

My understanding is big alloy thing, the clutch cover plate, and the other steel clutch plate have their dots spaced 120 deg apart for balance.

Its in one of my manuals, not sure which one.

Malcolm(t)
_________________
******************************
A Bike on the road is worth two
in the shed
******************************

[6899]

When I took my K1100LT apart, I found marks on all my parts - both pressure plates and the diaphragm.

Luckily I had already marked the clutch basket with typewriter fluid (obsolete item) That way if you only need to replace the clutch, the wild card is the diaphragm. I noticed that my new diaphragm did not have markings on it.

I also had to replace the O ring - at 14 yrs and 74K miles, it was hard and had no flex. While I was at it, I replaced the rear engine seal. At only 74K, the pressure plates were still useable (no evidence of damage - a benefit of Mobil One Synthetic 15w50?)


When I get my bike back together, look for a LOT of photos.

Martin
_________________
1996 K1100LT, 73K (bought at 61K on 2006)
1977 R100/7, bought new, rode 97K in 29 yrs before parting out
1970 R50/5, bought used, rode 40K & sold

BMWMOA #6899 since 1976
Indy BMW Club since 1975

[CrashBar]

I bought this seal puller at auto zone, and the main seal came right out.



Then I bought this socket which sat right in the groove of the old seal




Drove the seal in a litle further than in this pic, about 1/2 mm as suggested. Then reinstalled the thin "washer", clutch basket, and o ring. New Thrust washer and clutch nut are threaded on but not Torqued on yet. I'm a little confused about the additional 50 degrees rotation after the second torque setting mentioned elsewhere on this site (but which is not mentioned at Duck's http://smithduck.home.comcast.net/~smithduck/bmw/tech/clutch/clutch.htm ).
_________________
1993 K1100LT (116,000 miles and counting)
1973 Honda CB350F
1978 Honda CB550K
1973 Triumph TR5T

[Flying Duck]

[Scott_Anderson]

[old guy old bike]

That is exactly what it means. The most accurate way to tighten a fastener is by how much it stretches. Since we cannot measure the change in length on this setup the next best way is to measure the angle of rotation. Using a torque wrench is the least accurate but far and away the easiest way to set the load on a fastener.

Even though your torque wrench may be very accurate and precise, it will not guarantee that the fastener has the proper load on it. Some of the things that effect the load applied by torquing are lubrication, quality of threads, finish on mating surfaces and amount and type of lubrication.

All that being said, it's just a clutch nut. Tighten it to torque or tighten it with a carpenters angle finder. Either one is close enough for the girls we go out with.
Jeff
_________________
1993 K1100LT
2003 K1200GT Gone but not forgotten
2014 Victory Crossraods