BMW K bikes (Bricks)

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1Back to top Go down   Throttle body air screw o-rings Empty Throttle body air screw o-rings Tue Mar 26, 2019 6:22 am

MikeyD

MikeyD
active member
active member
BMW doesn't show a part number for the o-rings that go around the air screws on each throttle body. I checked the Bing website (http://bingcarburetor.com) and they only list throttle bodies for the R-series bikes.  However, when I called he was able to look up the part number and verified he had some in stock. They are about $2.25 USD.

I didn't think to ask him the part number, but I can report back with the part number once I receive the package. I'm working on an 1985 K100RT with throttle body assembly 95/34/401. Maybe I'll record measurements of the new ones so at least the measurements are available after the Bing o-rings are unavailable.


__________________________________________________
1985 K100RT (0052390), 1985 K100 (0030066), 2003 K1200GT (ZK01448), 1984 R65, 1984 R80ST, 1974 R90/6, 1976 R90/6, 1997 R850R, 1991 Honda CB250, 1998 Sportster 883
    

2Back to top Go down   Throttle body air screw o-rings Empty Re: Throttle body air screw o-rings Tue Mar 26, 2019 7:40 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Goodonya, Mikey. We look forward to either the dimensions or a valid Bing part number.

I recall someone on the forum not too long ago posted that they'd found a satisfactory substitute somewhere...I'll have a squiz and make a link. Having both yours and their info in one location is great for future repairs.


__________________________________________________

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT, 2013 R1200RT-P & 2022 S1000XR



"We take our bearings, daily, from others. To be sane is, to a great extent, to be sociable."

~John Updike.
    

3Back to top Go down   Throttle body air screw o-rings Empty Re: Throttle body air screw o-rings Tue Mar 26, 2019 10:11 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
MaxBMW shows an o-ring p/n 13 11 1 257 819 that is used in conjunction with the adjusting screw P/N 13 54 1 461 261.  These o-rings seem to only be used on the 2 valve engines.


__________________________________________________
Present:
1994 K75RT
1991 K100RS


Past:
1988 K100RS SE
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

4Back to top Go down   Throttle body air screw o-rings Empty Re: Throttle body air screw o-rings Tue Mar 26, 2019 10:17 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Since the adjusting screw is the same between 2V and 4V then it could be safe to assume the o-rings would be the same. I note the o-ring is an Airhead carbie piece as well - it's the enrichment lever (choke) shaft o-ring on Bing 32 & 40mm carbies.


__________________________________________________

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT, 2013 R1200RT-P & 2022 S1000XR



"We take our bearings, daily, from others. To be sane is, to a great extent, to be sociable."

~John Updike.
    

5Back to top Go down   Throttle body air screw o-rings Empty Re: Throttle body air screw o-rings Tue Mar 26, 2019 11:19 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
TWB, true, but the MaxBMW fiche doesn't list the o-ring for the 16v k100rs. 

???

I guess someone will need to pull a screw on a 4v and see what's there.


__________________________________________________
Present:
1994 K75RT
1991 K100RS


Past:
1988 K100RS SE
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

6Back to top Go down   Throttle body air screw o-rings Empty Re: Throttle body air screw o-rings Tue Mar 26, 2019 3:35 pm

MikeyD

MikeyD
active member
active member
Oh sure enough, it was hiding without a number in the diagram. Thanks for pointing that out. I didn't look closely enough. I naively looked up and down the parts list for "o-ring". I wonder if "...only in conjunction with Gasket ring" means they can only be purchased together and not separately, though they are priced separately.

Throttle body air screw o-rings JCmigCzoQQAAAABJRU5ErkJggg==

Well, it's good to know they can be replaced. My o-rings were flattened and glazed. Plus I have the throttle bodies out so it's a good time to change them.  The needle ends of the screws were carbon coated also, so cleaning up them and their air passages may be an improvement at idle.


__________________________________________________
1985 K100RT (0052390), 1985 K100 (0030066), 2003 K1200GT (ZK01448), 1984 R65, 1984 R80ST, 1974 R90/6, 1976 R90/6, 1997 R850R, 1991 Honda CB250, 1998 Sportster 883
    

7Back to top Go down   Throttle body air screw o-rings Empty Re: Throttle body air screw o-rings Wed May 12, 2021 7:43 pm

JiiPee63

JiiPee63
active member
active member
Hi there,

Do any of you know the dimensions of the o-ring? Inner diameter and thickness is needed. My electronic caliper is out of order at the moment Embarassed.

Edit: I took one o-ring out of the air screw and drove to autoparts dealer to find a suitable one. They had 5.0 x 1.0 O-rings, which I installed. So far so good. Original seems to be very close to 5.5 x 1.0 or 1.25. Case closed for the time being.


__________________________________________________
1986 K100RS 0089906 (Black 608)
Ex - 1984 K100RS (white), 1986 Suzuki GR650
    

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