R1150 Throttle bodies
Broadly speaking, the R1150 has fuel injection for on-power fueling but retains the 'old' idle mixture screw and butterfly valve adjustments for separate control of idle adjustments.
To that end, an adaptation of Grok's article follows...
Source: Grok, AdvRider member, engineer and manufacturer of the Harmonizer
http://advrider.com/index.php?threads/h ... 25/page-12
Post #234
There are 3 types of adjustments for balance and throttle body tuning.
1. Throttle body idle mixture
2. Idle balance and RPM combination.
3. Higher-RPM balance.
Do a careful valve adjust first. It helps immensely for smoothness.
Warm the engine to operating temperature, then shut it off.
Put a BAF (big ass fan) on it while doing the adjustments.
The first thing we are going to do is a rough idle balance and RPM adjustment. This will make sure the throttle bodies are working roughly equally and are running on the idle jets. This is in preparation for adjusting the idle mixture. If the bike is generally running well, this step 1 may not be necessary.
STEP 1. ROUGH BALANCE and RPM ADJUSTMENT.
PURPOSE: make sure the throttle bodies are contributing roughly equally and are operating on the idle circuits by adjusting idle balance and RPM in Harmonizer balancer mode.
Remove the caps from the left and right throttle bodies. Plug on the Harmonizer hoses and push the red button. After some seconds, the Harmonizer will finish it's 'calibration' routine and stand ready in 'balancer' mode. Start the motor and blip the throttle a couple of times. Make sure there is a very small amount of slack in the cables. Adjust the idle stop screws (not the idle mixture screws) such that the Harmonizer shows balanced at around 1000 to 1100 RPM. You don't need to be too accurate here. We're going to redo it later. Shut off the motor.
STEP 2. IDLE MIXTURE ADJUSTMENTS
PURPOSE: Optimize idle mixture for each throttle body by adjusting for max vacuum in Harmonizer 'gauge' mode.
Here's where we adjust the idle mixture for each throttle body. In the previous step, we made sure both throttle bodies were contributing roughly equally and were running on the adjustable idle mixture screws. Disconnect the Harmonizer hose from the right throttle body and put the cap back on. At this point the Harmonizer should be connected with one hose only, yellow port to left throttle body. Put the Harmonizer in 'gauge' mode by holding the button pressed until you see "gauge mode" and releasing the button. Start the engine. On the Harmonizer display you will see a left-zero graph and a numeric display that shows vacuum in inches of mercury along with the 'tach' reading. The object is to adjust the idle mixture screw on the left throttle body such that the vacuum reading is as high as you can make it. Make small adjustments and give the Harmonizer a few seconds to settle after each small tweak. Once you've maximized the vacuum reading for the left throttle body, shut off the motor. Disconnect the Harmonizer from the left throttle body, replace the vacuum cap, and remove the cap from the right throttle body. Connect the Harmonizer yellow port to the right throttle body. Still in 'gauge' mode, repeat the process of adjusting the idle mixture screw for maximum vacuum on the right throttle body. Shut off the motor.
STEP 3. FINE IDLE BALANCE and RPM ADJUSTMENT.
PURPOSE: Fine tune idle balance after messing about with the idle mixture adjustments in step 2.
Step 3 is basically a repeat of step 1. The Harmonizer is in 'balancer' mode and both hoses are connected. The object is to adjust the idle stop screws such that the Harmonizer show a balanced condition and the RPM's are within specifications. Shut off motor.
STEP 4: HIGHER RPM BALANCE.
PURPOSE: Adjust relative cable lengths such that the throttle bodies are balanced above idle, while the cables are in control.
Make sure both cables have a small amount of slack - maybe 2mm or so.
Put the Harmonizer in 'balancer' mode if it has automatically turned itself off. Restart the motor.
Adjust the relative cable length by adjusting ONE of the cable adjusters (the right side is traditional) such that the Harmonizer shows a balanced condition at around 3000 RPM or so.
That should do it!
Shut-off motor. Disconnect Harmonizer, replace vacuum caps.
Check and adjust the throttle hand grip cable free-play.
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