919 acting up -help! - Wrist Twisters
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post #1 of 47 Old 02-01-2014, 10:13 PM Thread Starter
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919 acting up -help!

Out of the blue every gear seems to have a spot between 5,000-6,000 rpm, when accelerating, that it the engine seems to bounce rapidly and not increase in speed. If I accelerate slowly it will go all the way to red line without any problems. The only change I did from before this problem to after was have my titanium exhaust high temp powder coated and I repacked it with 2/3 the packing. Not sure if this would have made any difference as the problem didn't start till about 500 miles after.. any help would be appreciated as I dont want to spend an arm and a leg for someone at a shop to just diagnose the situation. Thanks

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post #2 of 47 Old 02-01-2014, 10:21 PM Thread Starter
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Title was supposed to be "919 acting up -help"

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post #3 of 47 Old 02-01-2014, 10:23 PM
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My first guess is FPR. Check to see if all four pipes get hot while idling.

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post #4 of 47 Old 02-01-2014, 10:26 PM Thread Starter
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"FPR"?

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post #5 of 47 Old 02-01-2014, 11:11 PM
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Quote:
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"FPR"?
Fuel Pressure Regulator.

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post #6 of 47 Old 02-01-2014, 11:11 PM
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Fuel pressure regulator. If you do a search, you'll find a few threads on it.

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post #7 of 47 Old 02-01-2014, 11:20 PM
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I would suggest going through the basics first. Do alot of investigating on your bike before buying that 50 dolla part my man.

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post #8 of 47 Old 02-02-2014, 12:01 AM
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Fpr, battery ground, main ground to frame,

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post #9 of 47 Old 02-02-2014, 04:11 AM
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Quote:
Originally Posted by Tackleberry View Post
If I accelerate slowly it will go all the way to red line without any problems. The only change I did from before this problem to after was have my titanium exhaust high temp powder coated and I repacked it with 2/3 the packing.

That shouldn't have done anything, so don't worry about that. My first two questions ......

#1. Is the bike throwing any codes. MIL light illuminated?
#2. Do you have a PC3 installed?

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post #10 of 47 Old 02-02-2014, 05:29 AM Thread Starter
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That shouldn't have done anything, so don't worry about that. My first two questions ......

#1. Is the bike throwing any codes. MIL light illuminated?
#2. Do you have a PC3 installed?
No lights. I even had my (wannabe) gopro film it to make sure. And yes I have a pc3.

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post #11 of 47 Old 02-02-2014, 06:00 AM
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Check all of your grounds, especially the PCIII ground. Also, check the connection on the PCIII TPS wire. After that, check the FPR.

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post #12 of 47 Old 02-02-2014, 06:01 AM
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No lights. I even had my (wannabe) gopro film it to make sure. And yes I have a pc3.
Disconnect the PC3 and take it for a ride. See if it is still acting up, its always a good idea to remove the PC3 from the system when troubleshooting since a faulty unit or bad wire connection can give you some pretty weird symptoms.

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post #13 of 47 Old 02-02-2014, 06:08 AM Thread Starter
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Disconnect the PC3 and take it for a ride. See if it is still acting up, its always a good idea to remove the PC3 from the system when troubleshooting since a faulty unit or bad wire connection can give you some pretty weird symptoms.
Will do! Thanks

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post #14 of 47 Old 02-02-2014, 06:09 AM Thread Starter
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Check all of your grounds, especially the PCIII ground. Also, check the connection on the PCIII TPS wire. After that, check the FPR.
I'll look into that! Thanks

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post #15 of 47 Old 02-02-2014, 07:38 AM
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5-6k's is also the 'vibey' area of the RPM range, I bet it's a loose wire/ground.

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post #16 of 47 Old 02-02-2014, 10:34 AM Thread Starter
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5-6k's is also the 'vibey' area of the RPM range, I bet it's a loose wire/ground.
I hope it's something as simple (and cheap) as that! I need to look into that when I get a chance.

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post #17 of 47 Old 02-02-2014, 07:12 PM
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I hate to say it but this kind of a problem may be a rounded off dog clutch in the transmission. Under high torque the rounded edges of a gear allows it to just jump out. Maybe some of the more experienced folks on this forum can help with a diagnosis of this.

Hopefully it is just electrical or an FPR but it may be deeper.
Good Luck!

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post #18 of 47 Old 02-02-2014, 08:07 PM
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I could see it being the fpr... ive changed mine recently. Havent rode with the new one yet due to colorado weather but the last time i rode, vicky would kick (like a car with bad gas) and try to respond under heavy throttle. Wasnt happening. After work that day I parked it.

after putting on the new fpr (super easy btw) I have started it a couple times and even at idle she sounded much better. I was also thinking it could be the pressure in the airbox? Sensor may be misreading the absolute pressure.

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post #19 of 47 Old 02-02-2014, 09:45 PM
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Quote:
Originally Posted by Mark919 View Post
I hate to say it but this kind of a problem may be a rounded off dog clutch in the transmission. Under high torque the rounded edges of a gear allows it to just jump out. Maybe some of the more experienced folks on this forum can help with a diagnosis of this.

Hopefully it is just electrical or an FPR but it may be deeper.
Good Luck!
Highly unlikely it's anything transmission related - out of all that I've read on this forum about the 919, I think we've had only one known transmission issue. These things really are just bulletproof.

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post #20 of 47 Old 02-02-2014, 10:46 PM
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Highly unlikely it's anything transmission related - out of all that I've read on this forum about the 919, I think we've had only one known transmission issue. These things really are just bulletproof.
+1. Sadly, that was my first 919. It literally just grenaded itself. However, in its defense the Honda Dealership that rebuilt the transmission said there were indications of the transmission having been opened and tinkered with.

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post #21 of 47 Old 02-03-2014, 02:35 AM Thread Starter
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Highly unlikely it's anything transmission related - out of all that I've read on this forum about the 919, I think we've had only one known transmission issue. These things really are just bulletproof.
Such a relief! On my next free day I'm checking all the grounds and pc3. If that's not it I'll search on here for how to change and where to get the FPR. Thanks all for the help!

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post #22 of 47 Old 02-03-2014, 06:25 AM
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Such a relief! On my next free day I'm checking all the grounds and pc3. If that's not it I'll search on here for how to change and where to get the FPR. Thanks all for the help!
Check the FPR before you buy one. Easy to to do. Start bike, let idle a short time, squirt water on exhaust pipes to see if they all get hot.

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post #23 of 47 Old 02-03-2014, 08:02 AM
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Highly unlikely it's anything transmission related - out of all that I've read on this forum about the 919, I think we've had only one known transmission issue. These things really are just bulletproof.
His issue doesn't sound transmission related, but time and abuse can still cause problems with our trannys. Mine pops out of gear with an alarming frequency, but I picked up a used gearbox here on the forum. Installation was going to be a winter project, but then it got too cold for me to even think about tinkering in the garage.

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post #24 of 47 Old 02-03-2014, 08:44 AM
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Quote:
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Highly unlikely it's anything transmission related - out of all that I've read on this forum about the 919, I think we've had only one known transmission issue. These things really are just bulletproof.
I apologize for suggesting the transmission. Looking at the problem description I see the issue occurs in all gears. This shouldn't be the case if it were a face clutch in the transmission.
I had a hard time thinking it was a FPR since I thought that issue usually shows up with a rough idle. But i see now that folks have had evidence of FPR failure with the engine under load. There should be some raw gas (or at least gas smell) in the vacuum line if the FPR is the problem. On top of checking the grounds and PC3 and ECU connections you will have lots to play with!

Regards, Mark

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post #25 of 47 Old 02-03-2014, 03:32 PM Thread Starter
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Check the FPR before you buy one. Easy to to do. Start bike, let idle a short time, squirt water on exhaust pipes to see if they all get hot.
Great suggestion! I'll get on that asap. So basically (sorry I'm limited on my engine knowledge) if the FPR is faulty than some cylinders won't be producing power, or not as much, and therefore no/less exhaust leaving that pipe? Sorry if that's an elementary question, just trying to gain knowledge as I go.

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post #26 of 47 Old 02-03-2014, 03:49 PM
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Great suggestion! I'll get on that asap. So basically (sorry I'm limited on my engine knowledge) if the FPR is faulty than some cylinders won't be producing power, or not as much, and therefore no/less exhaust leaving that pipe? Sorry if that's an elementary question, just trying to gain knowledge as I go.
Yes, faulty FPR usually cause the engine to run more on the outside cylinders. The inside two pipes will heat up but not as much.

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post #27 of 47 Old 02-03-2014, 05:51 PM
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I think fuel gets sucked into cylinders 2 & 3 and fouls the plugs when the diaphram fails.

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post #28 of 47 Old 02-03-2014, 10:31 PM Thread Starter
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Ok I looked up on eBay, Amazon, Google and here and can't seem to be able to find out where to get a FPR to buy..? Just to price it out and possibly buy to have a backup if it isn't the issue.. any suggestions?

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post #29 of 47 Old 02-03-2014, 10:40 PM
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How many miles on your bike?

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post #30 of 47 Old 02-03-2014, 10:47 PM Thread Starter
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How many miles on your bike?
Just under 30,000

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post #31 of 47 Old 02-04-2014, 01:45 AM
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post #32 of 47 Old 02-04-2014, 07:48 AM
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Everyone has their favorite site but Partzilla looks to be a little cheaper for this FPR.

Partzilla again item 12.

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post #33 of 47 Old 02-04-2014, 02:53 PM
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post #34 of 47 Old 02-08-2014, 03:55 PM Thread Starter
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-Grounds checked.
-PC3 checked and loaded a different map (who knows).
-FPR bought and installed
> problem NOT solved!
This is so frustrating!
It sounds and literally feels like its skipping teeth from the chain but sounds and feels like it's coming from the engine area. The chain and sprockets are in great order so I'm pritty certain it's not that... any other thoughts before I fork up the coin and have a shop look at it?

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post #35 of 47 Old 02-08-2014, 04:17 PM
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Since it's happening in every gear at 5-6K, any chance it could be the clutch?

1) How much play do you have at the lever?
2) What kind of oil have you been using? Energy conserving could cause slippage.

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post #36 of 47 Old 02-08-2014, 04:31 PM Thread Starter
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Since it's happening in every gear at 5-6K, any chance it could be the clutch?

1) How much play do you have at the lever?
2) What kind of oil have you been using? Energy conserving could cause slippage.
Clutch feels the same as it always has from what I notice. And oil as it engine oil? If so its motul 5100 10w40 I believe. Just changed it last week to see it that would do anything (trying anything lol)

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post #37 of 47 Old 02-08-2014, 05:37 PM
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Quote:
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Clutch feels the same as it always has from what I notice. And oil as it engine oil? If so its motul 5100 10w40 I believe. Just changed it last week to see it that would do anything (trying anything lol)
Oil should be fine....just wondered if you were using auto oil.

Just wondered if something was causing the clutch to break loose when the torque was up.

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post #38 of 47 Old 02-08-2014, 06:39 PM
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Quote:
Originally Posted by Tackleberry View Post
-Grounds checked.
-PC3 checked and loaded a different map (who knows).
Did you try disconnecting it?
Quote:
-FPR bought and installed> problem NOT solved!
This is so frustrating!
It sounds and literally feels like its skipping teeth from the chain but sounds and feels like it's coming from the engine area. The chain and sprockets are in great order so I'm pritty certain it's not that... any other thoughts before I fork up the coin and have a shop look at it?
Have you visually inspected the countershaft sprocket and the splines on the shaft? Or for excessive free play in the rear cush drive? There are few malfunctions that can cause the sound and feel of the chain skipping teeth, and none can be caused by the FPR, PCIII, trans problem, oil, or any other suggestions posited.

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post #39 of 47 Old 02-09-2014, 03:05 PM Thread Starter
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I will try and disconnect the PC3 next free chance I get. And honestly I have no idea what a crush drive or the other are..? My mechanical experiences are limited unfortunately, but I am learning (trying to).

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post #40 of 47 Old 02-09-2014, 03:29 PM
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Sounds like a whole different description of what you described earlier. Now it sounds like a sprocket or chain issue. Do you have any seized or stiff links?

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