Speedometer problem
 

My bike has been waiting in a garage for summer last 5 months. During the winter season I have installed leovince cans and powercommander. Of course I wanted to hear that new sound with those cans and started the engine after having those parts installed. Sound was awesome, but...

When I use neutral gear and open some throttle on, the speed reading rises. When I turn the throttle off, the reading follows the rpms and settle down to 0 kmh. The temperature in the garage is maybe something like +5C if the coldness could cause something like that.

Is it possible that I have made a mistake while installing those parts? I tried to be careful and even read the instructions. The installation was simple. I have no idea what is wrong. Any help appreciated!

Remove the ignition key & disconnect your battery, leave it disconnected to one minute then reconnect it.

Thanks for the advice. I tried it today but it didn�t help.

Hi,

I think you have to verify the powercommander installation. As you explain the problem, don't have sense what happens.

A question. If you ride, the problem is the same or it happens only with bike stops and neutral gear ???

It can happens if there is a bad shielding to the pick up of pinion to CPU. May be the new installation has triggered the problem.

Try to verify. But is surely the power commander new installation.

Ciao.

I haven�t been able to test drive the bike yet because of snow. Yeah, you are maybe right. I should verify the powercommander connections. I think I will disconnect the pc and test again what will happen without it. If it doesn�t have any kind of effect I will deliver my bike to the nearest Yamaha service. Happy to have still valid quarantee.

Otherwise remove the Power Commander to see if it is the problem.

Well it is clear now that the powercommander is the reason. I removed the powercommander and all worked as supposed. I reinstalled it and the same problem occurs. Maybe the wires of powercommander induce that noise signal to the speedometer? Or the dealer just sold me a broken unit.

Him mm, I guess a fault Power Commander or cable.

It's what I supposed. It's clear we are speaking about an inducted signal detected by speedometer pick up (or wires of pick up to CPU) and triggered by the new installation. You can try to change the position of PC and wires road installation. You can try also to cover PC and wires with an aluminium foil (as per food), in order to define the position of the problem and to eliminate.

In any case I don't think is a problem of PC, why I know that the same problem can happens with new bike and original installation (weakness of project).

I hope to explained myself, but this is the maximum of my english. Sorry.

Ciao.

Thanks a lot Gianni. I think that the foil is an very good idea. I will try it next. I have already tried to move the powercommander and the wires too as much as possible. Of course I couldn�t move a lot the connection cables and connectors. I will try to use foil and locate the critical point.

I will see my bike not until next weekend but I�ll let you know when there is something to tell about.

The Power Commander gets it's RPM signal from the injector, I would move the injector wiring the right side of the injector & insulate the wiring, run the Power Commander cable down the right side of the bike & see if that make a difference.

I sent a support request to dynojet from their website. I told what is the problem and that it disappears when the pc is disconnected. I also told that I have made the installation as told in instructions.

I got a quite funny reply. They told me it shouldn�t do that kind of thing and suggested me to follow instructions to make sure everything is installed correctly. What can I say. Thanks for the tip!

Thus spoke Zarathustra.............never ask the landlord if the wine is good. You shoud see what write me Memjet for a similar question !!!!!!

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