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1Back to top Go down    Fitting rear main seal - wet or dry on Thu Jul 02, 2015 7:34 pm

Rockman


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I'm in the process of reassembling my motor and since I have a new rear seal I may as well fit it. The question is do I fit it dry or put oil on the seal lip before I put the clutch carrier back in place?

I've recently done the rear main on my R100GS and the wisdom there is that you fit it dry so that the teflon on the seal lip gets spread over the mating surface. The rear main on the K100 is different though and I wonder if the same principal applies.

Who has done one recently and what to you recon? The seal came from Motobins if that makes any difference.

    

2Back to top Go down    Re: Fitting rear main seal - wet or dry on Fri Jul 03, 2015 12:18 am

RicK G

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You should soak them in oil for 2 hours prior to fitting then wipe the excess oil from it, probably just to prevent it spreading over all and sundry, then fit it with 0.5mm protruding at the rear. Apparently this is because the newer seals have the lip in a different place relative to the older ones but I have found that providing the surface is good then put it in flush.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

3Back to top Go down    Re: Fitting rear main seal - wet or dry on Fri Jul 03, 2015 6:49 am

Ed

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moto bins made the same suggestion on their catalogue.
It's time for this uneducated grease monkey to explore the inner depths of the Rear main .
apart from the main seal could I kindly ask , what else needs to be placed in the shopping kart to replace the main seal. washers, clips etc.
hope it goes in for you alright Rockman.


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1987 K100RT Ex- police
1989 K100LT Ol' Blue and "Kart" the Kamper trailer. now KAPUT .
1993 K1100RS 0194321 Colour #690 Silk Blue aka" Smurfette"
    

4Back to top Go down    Re: Fitting rear main seal - wet or dry on Fri Jul 03, 2015 6:57 am

RicK G

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You will need to replace the big O-ring as well Ed


__________________________________________________
If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

5Back to top Go down    Re: Fitting rear main seal - wet or dry on Fri Jul 03, 2015 8:42 am

Ed

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Part No.40120
BMW Part No.
11 11 7 666 186



is this the one Rick .


__________________________________________________
1987 K100RT Ex- police
1989 K100LT Ol' Blue and "Kart" the Kamper trailer. now KAPUT .
1993 K1100RS 0194321 Colour #690 Silk Blue aka" Smurfette"
    

6Back to top Go down    Re: Fitting rear main seal - wet or dry on Fri Jul 03, 2015 10:45 am

RicK G

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No this is the one Ed 11211 460456


__________________________________________________
If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

7Back to top Go down    Re: Fitting rear main seal - wet or dry on Sun Jul 05, 2015 8:02 pm

Rockman


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groverK wrote:moto bins made the same suggestion on their catalogue.
It's time for this uneducated grease monkey to explore the inner depths of the Rear main .
apart from the main seal could I kindly ask , what else needs to be placed in the shopping kart to replace the main seal. washers, clips etc.
hope it goes in for you alright Rockman.
Its in, I didnt soak it but it received a good coating of oil so it should be ok I hope.

And yes with the O ring. You'll destroy the old one getting it out.

The only other problem I found was that the locating pins on the clutch were siezed in place and a lot of prising was needed to get the cluch off. I ended up damaging the clutch plate doing this. It was only just in spec anyway so I'd have replaced it.

Other than that, the motor is now back together. Replaced the output shaft, cleaned the starter clutch, replaced the oil sight glass, found out why the choke didnt work, replaced radiator hoses, put in new injectors. Just waiting for the clutch plate and the rubber boots from the plenum chamber to the throttle bodies to arrive and I can begin reassembling the bike.

    

8Back to top Go down    Re: Fitting rear main seal - wet or dry on Sun Jul 05, 2015 8:33 pm

RicK G

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Check the clutch steel plates for dishing, I have seen them so dished that only about 4mm was contacting on the outer edge of the plate.


__________________________________________________
If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

9Back to top Go down    Re: Fitting rear main seal - wet or dry on Sun Jul 05, 2015 8:53 pm

Rockman


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RicK G wrote:Check the clutch steel plates for dishing, I have seen them so dished that only about 4mm was contacting on the outer edge of the plate.
all good Rick. They are flat using a steel ruler to check. Plate looks like it was contacting over the full friction surface.

On a different note, What is the recommended hose clamps for the inlet manifold rubber connectors? Munich has them listed but at $4.95 each plus postage, a set of 8 is expensive.

    

10Back to top Go down    Re: Fitting rear main seal - wet or dry on Sun Jul 05, 2015 9:36 pm

RicK G

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Here is a Suzuki part number and some text to prove RT is to blame if they are wrong
Yay, 4 new throttle body clamps arrived today (Suzuki part no. 0940248208), screw tight types, black. Post 33 of http://www.k100-forum.com/t5166-k-pox-and-its-insidious-mental-side-effects#top
A few here have used them so I reckon they are OK.


__________________________________________________
If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

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