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Discussion Starter #1
I've had my 929 for about a month now. I had to get it up an running cuz it had been parked for a year. I noticed th bike idled at 1500 rpm after warm up. After reading that 1200 is th norm, I found th throttle stopper an decided to bring down th rpms. However, doing so makes th bike idle rough almost to th point of turning off so I brought it back up to 1500 an th idle smoothed out. Question is would there b any reason y it would would need to idle at 1500? Here's how I got th bike:

Power commander III
Hindle exhaust
Flap/servo disabled

I also recently installed a helicoil an changed th plugs to NGK iridiums. It had Denso before. It doesn't affect performance jus th idle.
 

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I've had my 929 for about a month now. I had to get it up an running cuz it had been parked for a year. I noticed th bike idled at 1500 rpm after warm up. After reading that 1200 is th norm, I found th throttle stopper an decided to bring down th rpms. However, doing so makes th bike idle rough almost to th point of turning off so I brought it back up to 1500 an th idle smoothed out. Question is would there b any reason y it would would need to idle at 1500? Here's how I got th bike:

Power commander III
Hindle exhaust
Flap/servo disabled

I also recently installed a helicoil an changed th plugs to NGK iridiums. It had Denso before. It doesn't affect performance jus th idle.

Is the fuel pressure regulator okay?
Have you synchronised the throttle bodies?
Have you tried spraying starter fluid around the throttle bodies to confirm there are no air leaks?
 

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Discussion Starter #3
How do u check th pressure regulator?
How do u sync th throttle bodies?
I will check for air leaks this weekend.
 

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The fuel pressure reg is easy to check. Lift the tank, locate the fpr. On mine, it's just under the rear of the tank. Pull the small vacuum line. Is there any sign of gas? It should be bone dry. If it is, now turn the ignition on to get the pump to prime. Let it pressure up, how about now, any gas dripping?
Typically, that little vacuum line runs from your fpr to one of the throttle body throats. If the diaphram fails in the fpr, then gas will leak to the throttlebody, giving you rough idle, or stall. I've replaced a couple of these now, really easy.
If you need a SvcManual, I'll get you the link.
Good luck.

Edit: Confirm your fpr before moving on to the throttlebodies. Recently a guy on another forum went to all the work of removing the throttlebidies, sending them in, reinstalling them, only to discover it was the fpr all along.
 

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Discussion Starter #5
The fuel pressure reg is easy to check. Lift the tank, locate the fpr. On mine, it's just under the rear of the tank. Pull the small vacuum line. Is there any sign of gas? It should be bone dry. If it is, now turn the ignition on to get the pump to prime. Let it pressure up, how about now, any gas dripping?
Typically, that little vacuum line runs from your fpr to one of the throttle body throats. If the diaphram fails in the fpr, then gas will leak to the throttlebody, giving you rough idle, or stall. I've replaced a couple of these now, really easy.
If you need a SvcManual, I'll get you the link.
Good luck.

Edit: Confirm your fpr before moving on to the throttlebodies. Recently a guy on another forum went to all the work of removing the throttlebidies, sending them in, reinstalling them, only to discover it was the fpr all along.
Koo thanx jondog9, I'm gonna check it this weekend. Let's jus say it isn't th fpr an there aren't any air leaks. How would I go about syncing th throttle bodies? Would I need a special tool? I'm only asking so I can jump from one thing to next when I get to work on th bike. Yes I definitely need th manual. That would greatly appreciated.
 

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I have no idea how to sync the throttlebodies. I've never had issue to do that. Shows you what I know, I didn't even know to sync throttlebodies. I thought that was just a carb thing. It sure sounds like the fpr to me, but after sitting for a year...


You may need to register with this site to get the download, but it's no hassle at all.

929 SvcMan
 

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Discussion Starter #7
I have no idea how to sync the throttlebodies. I've never had issue to do that. Shows you what I know, I didn't even know to sync throttlebodies. I thought that was just a carb thing. It sure sounds like the fpr to me, but after sitting for a year...


You may need to register with this site to get the download, but it's no hassle at all.

929 SvcMan
Thanx for th manual. Downloaded it without having to register. Apparently th throttle bodies r synced like carbs. Early fuel injection I take it. Either way I'll post my findings this weekend.
 

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I have no idea how to sync the throttlebodies. I've never had issue to do that. Shows you what I know, I didn't even know to sync throttlebodies. I thought that was just a carb thing. It sure sounds like the fpr to me, but after sitting for a year...


You may need to register with this site to get the download, but it's no hassle at all.

929 SvcMan

Please don't post links to illegal materials on this forum.
If people want manuals they're easy enough to find via Google or Torrent.
 

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This generation fuel goes off so if it's been sitting for that long the throttle bodies might be gummed up had a similar problem with my project bike
 

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I didn't check the link but I assume it is to an illegal copy of a service manual?
I have no idea if it's an illegal copy. If you know that it is, then I wont use it anymore. I kind of doubt it and never even thought of it since these bikes are a decade old. Sorry. If I'm doing something wrong here, it's not intentional. And no it isn't easy enough to find some of these manuals. I still don't know about, or use torrents, and my search effors for manuals in general is never easy. That's why I pass a couple of them along. :idunno:

This generation fuel goes off so if it's been sitting for that long the throttle bodies might be gummed up had a similar problem with my project bike
Not sure what you mean?

I don't know how many spray nozzles your injectors have on the 929, but on my bike it's 4. And the spray pattern results in larger atomization breakdown, then say the next generation which has slightly bigger throttlebodies but 12 smaller spray jets for smaller atomization. Which means smaller orifaces - that might clog a little quicker than a bigger one. Old gummy gas is an enemy for sure. If it's gone that far. Hopefully not...
 

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I have no idea if it's an illegal copy. If you know that it is, then I wont use it anymore. I kind of doubt it and never even thought of it since these bikes are a decade old. Sorry. If I'm doing something wrong here, it's not intentional. And no it isn't easy enough to find some of these manuals. I still don't know about, or use torrents, and my search effors for manuals in general is never easy. That's why I pass a couple of them along. :idunno:

Just to clarify, unless a manual (or any other published work) includes the statement in writing that it is for free distribution, then to distribute it is illegal under copywrite law.
I collect them and have distributed many myself to people that can't find them themselves, but not via this forum that quite rightly and actively enforces copywrite laws.
 

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Discussion Starter #14
Update: I checked out all possible areas that might cause a rough idle but it all checked out good. Fpr good an no immediate air leaks. I've ran a can of sea foam and regularly use Sta-bil. Didn't attempt to sync throttle bodies cuz I don't kno how n didn't wanna make things worse. Bike is idling steady at about 1300 rpm. I was jus more careful adjusting th throttle stopper. I prob moved it too hastly th first time. But its all good now.
 

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Discussion Starter #15
decided to bump this since it has to do with rough idling. i turn my bike on this morning and immediately notice the rough idle. after it warms up the rpm's drop to 1k. i give it a little throttle and the rpms go back to 1300 but its still rough. riding in all gears is smooth, no surge or bucking. its only at idle. im guessing its the FPR. sorry for not diagnosing first, i jus wont have time till the weekend. for those of you that have had issues with the FPR, is a rough idle one of them?
 

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Crazie,

I found your post while searching for the symptoms my bike is having. I wouldn't say mine runs BAD, but I've ridden bikes long enough to know that something just isn't 100%. I, too, can tell my bike is running slightly rich at idle (I smell it) and the low rpm part throttle response is sloppy (slight bucking, jerking). The idle isn't too smooth either.....sounds lumpy (is that a word?)

Anyway, just curious what made you change the FPR? I thought in an earlier post that you had ruled that out? I'm assuming by disconnecting the vacuum line and verifying that it wasn't pissing fuel? What made you decide it was bad? Mine FPR is bone dry when I disconnect the vacuum line and pressurize the fuel rail.

FYI, my bike is 100% stock with 10K miles. 2001 model.
 

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Discussion Starter #19
I think my rough an rich idle was an fpr that was going out slowly. When it finally crapped out, it was pissing fuel. But it wasn't initially. Have u checked for leaks around th tb boots?
 

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I haven't tried the TB boots yet. Did your symptoms worsen as the fprwent bad? Wouldn't a vacuum leak there actually make it run leaner rather than richer?
 
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