RIDDLE ME THIS MECHANIC JUNKIES!!!! Serious Problem :-( No answers though

Hey everyone sorta new on here. I am on a couple other forums for VFR's but thought I would post on here.

So here is my Situation..... Recently I have been doing a lot of wheelies on my bike dont worry being safe about it as safe as you can bee with wheelies. Anyways I dont think it has anything to do with wheelies but thats just a background. Also recently gutted one of my exhaust sides (OEM Exhaust).

Ok here is the problem. Recently I was riding with my crew and we were going to a big bike night in VA. Well out of no where I got off the highway and started to down shift when I downshifted my bike lost power let go of the clutch power came back. Well eventually I had to stop at a light and well came to a light and of course my bike turned off. This time though I couldn't get my bike to turn back on pulled over and checked my bike.

I went through everything I could while I was pulled over thought it was battery wasnt...thought it was a fuse wasnt..

Went home took my bike apart. Checked the battery again to make sure it was good. pushing 11.9 V so thats good. BUT I realized when I turned my bike on it wasnt giving the whining sound that it usually does when the fuel pump is priming. Well my tools ran out and I had to bring it to a shop but what do you guys think it is?

Fuel Pump?
Gremlin?
Kill Switch?
Tilt Sensor?

Let me know thanks guys!

 

Think 11.9v is not so good. Was that running voltage or standing voltage?

 

Standing Voltage.

 

Should be 12.8 for a fully charged lead acid, Open Circuit Voltage. 11.9 is no good. Fuel injection doesn't like to run on low voltage.

 

Battery definitely sounds in trouble. Check this website for information - Motorcycle Battery Frequently Asked Questions from the White Dog Guide to Batteries


Don't be tempted to just sling in a new battery and think its sorted. You really need to find out why the battery has a low charge or there is a good chance the new battery will die as well.

Use a multimeter to check battery drain to see if you have some sort of short. If there is no constant drain then you need to check for faults in the charging circuit - Loom/Stator/RR/battery, all need to be in good health, and a fault in any one can quickly kill the others. Rather than repeat stuff - search on here for posts by Rubo - then check the AC stator output at idle and at 5k rpm, check the RR diodes.

SkiMad

 

Sounds like the good old regulator / rectifier Same thing happened to my gen 4./ Check out the post already on this site , many people have had the same problem and
there are some good mods written by some very knowledgable people

 

I second that. This is the classic failure of the changing systems that sneaks up on you and leaves you stranded. Only way to know for sure is, charge your battery up so that you can start the bike and then test the output of the charging system. It's probably just the regulator rectifier unit that has failed and you battery will recover. In extreem cases the battery is shot as well but it isn't the source of the issues, only a victim. Now when you check the charging voltage with the bike running it should be above 14v and in some cases it will be until you ride the bike for a bit and the recitifier gets hot. When the rectifier gets hot, it startes to fail and the voltage drops off to the point that the battery discharges. This is why you can be riding along all happy and then you stop at a light and she dies. Other early warning symptoms include you clock constantly loosing the time and needing to be reset every morning.

This is not what you want to see when you test the charging system with the bike running.





Because this can sneek up on you without warning, some of us have installed voltage monitors on their bikes to warn us if the charge voltage drops off. At least the warning light gives you a bit of a heads up that the bike will be going foo foo shortly.

FYI, the regulator lives just in front of your right knee behing the fairing.



Hope this helps, and let us know what you find.

 

While I agree with all of the above contributors that you certainly want to check the charging system I'd also inquire about the age of the battery. If it's the original battery in your 06 then it could be as simple as the battery got old and died.

The first thing I would do is put it on a modern battery tender which will both recharge it and test to see if it still holds the charge.

Best of luck with it!

 

Anytime there are VFR charging problems you need to inspect plugs between stator and r/r and the plug on top of the starter solenoid for melting, burning or other signs of electrical distress.

I'd suggest consultation with a psychologist to address your foolish wheelie-madness. Why ??:crazy: You feeling inadequate ? Your wheelies are a sign of immaturity and irresponsible motorcycle riding. Grow up !

 

Sounds good guys! I do know or think that the battery is the original battery! I think at least im not sure the guy i bought it from didnt really say anything about the battery. So that could be it. Right now its in a shop so Im going to see what the Tech says and i will let you guys know. You guys know your stuff thanks for all the input!

All my fellow riders here in Virginia Beach said get rid of my bike but I love it no one else has it around me well there are only like 2 or 3 I know of so I love my bike! And love the guys who ride VFRs

Anyways I will let you know what happens!

 

My old gs500 used to have a gremlin like this. Most bikes have a kickstand safety which is current ORed with a diode. This cuts power to ignition/efi if you are in gear and the kickstand comes down. If the clutch is pulled in, the safety is bypassed.

The spring on my gs which pulls the kickstand up had loosened up, and railroad tracks /wheelies would sometimes cut power. Check the sensor, kickstand, diode, and relay for corrosion, improper placement, poor contact, weak return spring in the kickstand, and shorts in the harness.

I would have to review the schematic to come up with a list of likely faults, but do a visual inspection of those components first and post back.

 

That kickstand safety circuit disables the fuel pump too...

 

Ditto what pherako said, I was about to say "check the sidestand safety switch too" along with the stator / RR stuff. Squirt it liberally with some WD40 + contact cleaner.

 

do you drop the front wheel or does it kiss the road?? sometimes to much of a jolt can loosen 1 plug or fitting and this can also cause your problem. All the above is good advise the problem is always which one is giving you grief , that may require some tinkering. hope its a quick easy fix

 

So Derek, what was the outcome of this issue? It's been 5 weeks since you started this thread, hopefully you've found and resolved the problem.
John