V7 II - Downhill stalling issue - engine dies when clutch pulled

[beetle]

Disconnect the clutch switch and test again. No need to log.

[waxi]

Can you send me the entire log?

Find it in the same post.

[waxi]

Disconnect the clutch switch and test again. No need to log.

Nothing.

[beetle]

Nothing.

What? Same? Stalled?

[waxi]

What? Same? Stalled?

Yes, the same. I was also pressing the switch while driving downhill... Not a slightes difference. Stalled.

Can we lift idle again just for test? For another 150 RPM?

[RinkRat II]

Hi waxi,
 Does your model have ABS? The reason I ask as it seems odd that the engine goes into a different mode when coming down on compression, All bikes I've ridden were always linear until you stopped or killed it. 

Regards, Paul B

[beetle]

Yes, the same. I was also pressing the switch while driving downhill... Not a slightes difference. Stalled.

Can we lift idle again just for test? For another 150 RPM?

Yep. Link sent.

[waxi]

After some crazy days I finally tested +200 idle RPM's map. It does make it a bit better! Problem is still there, but it didn't died so fast.
Another idea: If there is something loose regarding the butterfly... What would happen If I artificially lift TPS by holding the throttle twisted a bit when resetting TPS with GuzziDiag?

[beetle]

Don't do that, you don't have a calibrated hand. 


Try it. Interesting things might happen.

[redhawk47]

Have you checked the fuel pump?
Several others, in addition to myself, had a similar problem with BMW F800GSs - stalling when off the throttle.
The solution was to replace the fuel pump. Cause was never found, to my knowledge. Perhaps low voltage when engine was at idle speed.

[beetle]

Surely then it would occur on level ground as well? Not just downhill?

[beetle]

I don't think it's a loose butterfly. An examination of an MIU unit makes me think it's unlikely. The butterfly is attached via screws which are punched to prevent movement. Even if one or both screws became loose, it would only move a tiny mount. Anything more than that would have an affect at cruise. The butterfly shaft does have slight lateral movement. The shaft has a screw and clip to hold the throttle cam, but if the screw was loose it only allows the cam to move sideways on the shaft.