BMW R1100 Spezifikationen PDF herunterladen (Seite 33)

There is one black tube attached to the under side of each throttle body. Remove both black

(vapor recovery) tubes and you will expose the brass nipples that point down. Attach one of

the carb stix's flexible plastic tubes to each brass nipple. Make certain that the carb stix's

plastic tubing does not touch hot exhaust parts; the tubing will melt. There is no need to plug

the black vapor recovery tubes.

Starting the Adjustment:

Loosen the right side crossover synch cable by loosening the 10mm lock nut and turning the

knurled knob counter clockwise to ensure that there is slack ['97- loosen right throttle cable] .

Count the turns you make to lightly seat both the right and left large brass bypass screws by

turning them clockwise with a flat screwdriver. Record this information for possible trouble

shooting later.

As a starting point, back out both large brass bypass screws 1 1/2 turns for an RS or RT; 2

turns for an R or GS.

Start the engine. The bike may idle rough because it is not in synch. Do not be concerned

about a rough idle at this time. If the bike will not idle at all due to air starvation, back both

large brass bypass screws out by 1/4 turn (ccw) until the bike maintains a rough idle.

If the bike is idling too fast, reduce the air flow by screwing both large brass bypass screws

clockwise (cw) in increments of 1/4 turn. If the bike is idling too slowly, increase the air flow by

screwing both large brass bypass screws counter clockwise (ccw) in increments of 1/4 turn.

At some point you will not be able to decrease or increase the idle speed by moving the large

brass bypass screws. Return to the setting immediately prior to the point where the idle was

not changed by moving the large brass bypass screws.

You now have the large brass bypass screws at the starting point for the low rpm synch.

LOW RPM SYNCH:

With the throttle at idle (1,000 to 1,200 rpm on the tachometer) and the bike at normal

operating temperature, turn the right large brass bypass screw clockwise until the mercury

columns in the carb stix are at an equal height. If moving the right large brass bypass screw

does not accomplish equal height mercury columns, then reset the right LBBS to its starting

point and turn the left LBBS clockwise until the mercury columns in the carb stix are at an

equal height. The amount the mercury column rises or falls, its actual height, is not important.

What is important is that both left and right mercury columns are the same (equal) height.

The goal is to balance the throttle bodies with the large brass bypass screws open as little as

possible (minimum counter clockwise opening). Bob Gorman notes that, when adjusted

correctly, the screws should be within 1/2 turn of each other.

If the bike does not adjust by turning the LBBS clockwise (in), or if the idle speed is too low

(below 1,000 rpm), change the starting point of the low rpm synch by backing out both LBBS

(counter clockwise) by an additional 1/4 turn.

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BMW R1100 Spezifikationen Seite 33