BMW K bikes (Bricks)

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1Back to top Go down   K100 piston rings pre and post 1988 Empty K100 piston rings pre and post 1988 on Tue Dec 30, 2014 4:37 am

Fentible

Fentible
Silver member
Silver member
Hi

Anyone know what the change in piston rings was? the K100 pre and post 02-1988 have different part numbers.

Happy new year to all

Fent

    

2Back to top Go down   K100 piston rings pre and post 1988 Empty Re: K100 piston rings pre and post 1988 on Tue Dec 30, 2014 5:40 am

Inge K.

Inge K.
VIP
VIP
The piston rings was pinned (like a two stroke) during -88, to wean them from smoking.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

3Back to top Go down   K100 piston rings pre and post 1988 Empty Re: K100 piston rings pre and post 1988 on Tue Dec 30, 2014 11:43 am

Fentible

Fentible
Silver member
Silver member
Thanks IngeK

Does that mean I can't use the later rings in the earlier engine??

    

4Back to top Go down   K100 piston rings pre and post 1988 Empty Re: K100 piston rings pre and post 1988 on Tue Dec 30, 2014 12:00 pm

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
The later rings will have a little bevel or cut out at the ends to mate with a bridge across the ring groove in the piston. Ring will therefore be slightly shorter to allow for thw bridge so it won't be usable. Two stroke engines always had rings pinned so the ends would not rotate into the transfer ports in the cylinder wall. You only need them on a 4 stroke engine where the cylinder is horizontal. Not sure but I have a feeling the groove dimension may also have changed.



Last edited by 92KK 84WW Olaf on Tue Dec 30, 2014 2:15 pm; edited 1 time in total


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 103,800 miles
1983 K100RS 0011171 Fricka 606 29,495 miles Damn K Pox Its a Bat outta Hell Now 36,188  miles
    

5Back to top Go down   K100 piston rings pre and post 1988 Empty Re: K100 piston rings pre and post 1988 on Tue Dec 30, 2014 12:10 pm

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
.



Last edited by 92KK 84WW Olaf on Tue Dec 30, 2014 2:16 pm; edited 1 time in total

    

6Back to top Go down   K100 piston rings pre and post 1988 Empty Re: K100 piston rings pre and post 1988 on Tue Dec 30, 2014 12:35 pm

Fentible

Fentible
Silver member
Silver member
I thought that might be the case, thanks for confirming.

Fent

    

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