My '07 B11 cam into my hands 1-1/2 years ago in a fubar state of tune. It had been diagnosed with a "failed stepper motor" along the way, and been tuned to try and make it work. Stepper motor still hooked up, air screws on the TBs open 1-3/4 turns. No yellow paint in sight.
Fortunately I got a DVD with the Power Point Presentation with the bike, and I realized this was different from my two previous 15M models.
The big challenge was to determine where the LH TB was at.
I had to dig into my navigation skills to determine beyond doubt that "4.8" does not represent degrees at all, but is a measure in m/m of the difference between the "leading edge" and the "trailing edge" of the throttle valve in the bore of the TB. You measure this from the outer edge of the TB. Many measurements later I found the key: add up two (any two) measurements, divide them by 2, and you have the pivot point of the throttle valve. It is 31 m/m from the edge of the intake. Now you measure the "leading edge" of the throttle valve only (closest to the intake) at 1/2 of 4.8m/m. That would be 2.4 m/m, subtracted from 31 m/m, it should sit at 28.6 m/m from the edge of the TB. Easily measured with your best calipers (digital).
After all this nonsense, the air screws were closed, the throttle bodies were balanced and the stepper motor (which I had isolated) was hooked back up. That was last October and 8000 km ago.
Bob has most definitely been my uncle since then. I almost fainted when this thing burbled to life, and settled into a nice idle. It has never missed a beat since then. It idles at 1200-1250 (on a good tune-up tachometer)
The Power Point sets the target at 4.8, with a TPS range of 4.5 to 4.9 (inclusive) as being acceptable on your diagnostics, saying if you are within this range, a TPS re-set is not required.
Speculating: this should give a little wiggle room at the end of the assembly line to set each bike up at the desired idle speed, after everything is balanced.
My take on it: Set it at 4.8, note the angle of the Allen key resting in the Sacred Screw. Do your TPS re-set here. If you do some minor adjustments from there, your throttle valve and TPS should be in agreement at that point, and you can go back to that setting for your next re-set.
One thought about the dire warning in the WS manual: you are messing with Euro 3 emissions......
Fortunately I got a DVD with the Power Point Presentation with the bike, and I realized this was different from my two previous 15M models.
The big challenge was to determine where the LH TB was at.
I had to dig into my navigation skills to determine beyond doubt that "4.8" does not represent degrees at all, but is a measure in m/m of the difference between the "leading edge" and the "trailing edge" of the throttle valve in the bore of the TB. You measure this from the outer edge of the TB. Many measurements later I found the key: add up two (any two) measurements, divide them by 2, and you have the pivot point of the throttle valve. It is 31 m/m from the edge of the intake. Now you measure the "leading edge" of the throttle valve only (closest to the intake) at 1/2 of 4.8m/m. That would be 2.4 m/m, subtracted from 31 m/m, it should sit at 28.6 m/m from the edge of the TB. Easily measured with your best calipers (digital).
After all this nonsense, the air screws were closed, the throttle bodies were balanced and the stepper motor (which I had isolated) was hooked back up. That was last October and 8000 km ago.
Bob has most definitely been my uncle since then. I almost fainted when this thing burbled to life, and settled into a nice idle. It has never missed a beat since then. It idles at 1200-1250 (on a good tune-up tachometer)
The Power Point sets the target at 4.8, with a TPS range of 4.5 to 4.9 (inclusive) as being acceptable on your diagnostics, saying if you are within this range, a TPS re-set is not required.
Speculating: this should give a little wiggle room at the end of the assembly line to set each bike up at the desired idle speed, after everything is balanced.
My take on it: Set it at 4.8, note the angle of the Allen key resting in the Sacred Screw. Do your TPS re-set here. If you do some minor adjustments from there, your throttle valve and TPS should be in agreement at that point, and you can go back to that setting for your next re-set.
One thought about the dire warning in the WS manual: you are messing with Euro 3 emissions......