BMW K bikes (Bricks)

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1Back to top Go down   Throttle Body Vacuum Variation Empty Throttle Body Vacuum Variation Fri Sep 28, 2018 8:36 pm


active member
active member
i have measured the 4 throttle baby vacuums and compared and I find that #2 is wY higher than the rest and seem to be unable to adjust screws to sync, I have checked with a spray of engine start and also propane, check the rubbber as best I can.
Any ideas please 
I have also just complete a valve clearance check and all are ok


2Back to top Go down   Throttle Body Vacuum Variation Empty Re: Throttle Body Vacuum Variation Sun Sep 30, 2018 10:30 pm


Life time member
Life time member
The passage the air screw controls is probably blocked.  Try removing the screw and shooting carb cleaner in there.

Present: 1991 K100RS "Moby Brick Too"
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175

3Back to top Go down   Throttle Body Vacuum Variation Empty Re: Throttle Body Vacuum Variation Mon Oct 01, 2018 1:01 am


or a pipe cleaner soaked in carb cleaner, through them all

but the feed passage to the valve could be blocked as .75 suggests

cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )

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