Adjustable exhaust for the 929/954

The operation scheme is shown in the image:

As you can see, this system works together with a valve inlet and driven by the same motor. To 3000 system reduces the cross section of the pipe, after it opens fully, but at 7,000 open additional channels connecting adjacent pipes. Since the return of up to 3000 hardly anyone is interested (not deaf, okay), we can assume that the narrowing of the tubes in this range leads to a decrease of the pulsations at the exit and helped Honda to get certified for noise.

How it works in the real world.

1. Absolutely perfect 929 fire with mileage 8000km, all grades 5.
2. Testpilot .
3. Head 551SSP(Andrew).

Unhooks cables from the device. Dismantle the valve on the inlet. Remove the cover from the actuator on the exhaust . If you want to show damper can be unscrewed 2 bolts and remove.

Rotating shaft device and installed in position 1 (label 6 hours). Collect. Go. A lot of noise from the box filter. Not going. Set to position 2 (label 12 hours). Smooth pull throughout the rpm range without failure. Set to position 3 (9 o'clock mark). The bike does not know. Even the slow addition of a gas leads to lifting the front wheel. A lot of noise from the box filter. Failures at lower rpm. To ride hard.

It would seem that everything is fine, the valve is needed. Just one problem - if all to collect back, it will be worse than just locked in position 2.

Why? Device it doesn't work that instantaneously. Acceleration at 1st gear takes only 3 seconds, so the device is in a constant state of shift. The resistance to release increases. If it lacked the first "ecological" stage, surely it would be better. But we have what we have. In sixth gear on the highway everything works as it should, but the city is the ballast. In addition, raises questions for such a strange shift pattern at dispersal - first motor is for 6 hours, then it's off for 12 hours, then returns to 9. The delusion of some kind.

By the way, here's the schedule for full akrapovich in which there is no device. At any rpm this issue is not worse than regular, I'd say his schedule is even smoother:

Disable or not?The choke off in any case. As for the device - if it broke - off by far and locking in position 2. It makes sense to think about a rigid fixation, because of the vibrations of the shaft can be rotated. If the device works - idk., but if you ride only in the city, it only hinders. Again to go to the long road and discover half way through the burning light of the diagnosis and the valve is hung in an unknown condition - as it should be? By the way, sell titanium tube, which are inserted instead of the valve. The manufacturer promises to increase the thrust of the entire range and, of course, weight reduction ;)

Frankly, one gets the feeling that the purpose of this site rather marketing. In 1000RR there is no such thing, there is a valve that shuts off the hole in the release and all.