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Have a VTX 1800R. Runs Great. Put some Jardine Driving lights on the bike. Wired them by the instructions. Hooking a ground to the turn signal green wire as a ground and the positive wire to the white line on the headlight. Started the bike up, lights worked perfect. On when on dim and off when on bright. Cranked the bike up in neutral, and it ran great, lights worked perfect. Then, I put it in gear and the idling jumped up to about 3000 rpms in 1,2,3,4,5 gears. Put it back in neutral and it dropped back down to about 800rpms. Took it to a local dealer and they called Honda Tech Line but didn't get an answer yet. All I did was hook up the lights. However, I did cut the wires on the honda driving lights socket and tried to hook it up to that first because I was afraid it would blow the headlight socket. I cut that plug completely off the bike. Local dealer said that shouldn't have affected the idling. But, it idles about 3000rpms now when I come to a stop. Put it in neutral ,it drops back down like clock work. Has anyone heard of this happening and have a solution. There are master mechanics at the dealer in Aiken. They can't see the bike until May 12th. anyone have any idea about what happened and how to fix it. Had the oil changed and road it about 100 miles today think the computer might reset it self. Disconnected the battery and hooked it back up, thinking it might reset itself. Nothings worked. I don't know what they did at the Honda dealer.
 

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that sounds rather strange

I would pull fuses and see if you can make a difference by pulling one at a time.

3000 rpms,, eh gads,, thats pretty much screaming sitting there on the stand with no power demand on it.

3500 equates to about 80 mph in high gear.


GT
 

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I say its the neutral light. Every time it goes out the RPMs jump up. I dont know really ...............:dontknow:

Seriously though. Have you posted this ? on the main board ?

Good luck

TCT
 

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So, in the IT world, you should always have a backout plan.
That plan is usually "put it back the way it was" before the change.
Try it...see if it fixes the idle.
If not, then it's unrelated and just coincidence.
 

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The only thing I can think of that would automatically change the RPMs that drastically would be the Engine Control Unit, or Engine Control Module, (ECU/ECM).
The neutral switch plays into the equation also to trigger the problem. Is there a simple way to disable the engine controller to see if the idle RPMs return to normal? I know that little device has all kinds of sensors that are a big part of the bike's electrical system and the Engine Idle is one thing it does control. Fooling with the bike's wiring could have affected or screwed up the ECU's operation.

You'd likely get better answers if this was posted on the 1800 Tech forum.

http://en.wikipedia.org/wiki/Engine_control_unit
 

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The 1800 has a single ground point for the FI, ECU and lamp grounds. That may need to be cleaned and tightened. The headlight ground goes to the same screw
and if the ground connection is bad, the reference to ground is lost. Check the fix for the 1800 ground. I will try to find the link. The bad ground causes many performance issues per the posts.
The common electronics ground - causes the most problem, is located on the front ignition coil.
http://www.vtxoa.com/forums/showthread.php?t=205905
http://forums.bareasschoppers.com/viewtopic.php?f=86&t=545

http://www.bareasschoppers.com/schematics/02-03VTX1800R-S_schematic.jpg
 
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