Hesitation problem (Full Version)

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Hesitation problem

  

stynkmonkey -> Hesitation problem (5/5/2008 7:08:04 AM)

I have a 95 900rr, it's currently running with a Vance and Hines full pipe and K&N filter. I have no power issues at all and the plugs look good, no knocking either. I noticed that at cruising speeds. It doesn't matter the speed as long as I stay at it for a while, the bike seems to hesitate a little bit from time to time. Feels like a strong gust of wind hits me. The revs don't change so it's not a clutch issue. I had the fuel pump go out on me a while back and I know the new one is running good. The only thing I didn't change was the fuel filter. Do you guys think that a dirty filter would cause that little bit of hesitation?

  
900FighterRR -> RE: Hesitation problem (5/5/2008 4:45:24 PM)

Got the same bike I do brother, very nice.  Its possible its the filter, but unlikely.  You should just change that anyway because its cheap and easy and you gotta do it anyway. When was the last time you cleaned your carbs.  I would start there if anywhere. Its sounds like a part throttle issue but its hard to diagnose by what your describing.  You might have to wait until it gets little more pronounced to pinpoint it.  See if you can recreate the problem over and over and then give up some more notes on the throttle position, revs, and speed.  Hickups can also be from out of sync carbs which you wouldn't notice when you varying the throttle.  A vaccumn leak is also a possible culprit.   Sorry I can't help more but there needs to be some more info to narrow it down.  

dinez74 -> RE: Hesitation problem (5/5/2008 11:59:45 PM)

I will change the plugs first, sometimes looks can be deceiving. Putting your hand in the carbs can be messy and more problems. Just be sure the plug is not the problem.

Ghusar -> RE: Hesitation problem (5/6/2008 3:37:10 AM)

Stynk I just had a carb clean and sync with new plugs and the hesitation now is because she scares the shi* out of me LOL

try the carb clean

stynkmonkey -> RE: Hesitation problem (5/6/2008 8:16:33 AM)

I don't think it's the carbs. Up until my fuel pump crapped out on me it was doing fine. When i installed the new pump I noticed that the fuel was running all messed up (thanks to the previous owner) it was going from the tank to the pump then backwards through the filer to the carbs. (no wonder the pump crapped out) Also my fault for not noticing it. Now that it's all back together and routed properly I'm getting the little hesitation/surging problem. The plugs are new with less than 1k on them. Since it was running backwards I thought the filter might have something to do with it.

Manic -> RE: Hesitation problem (5/6/2008 10:32:03 AM)

What condition are the chain and sprockets in?

stynkmonkey -> RE: Hesitation problem (5/6/2008 12:56:39 PM)

They are all new maybe 500 miles on them, they are at the proper tightness too.

900FighterRR -> RE: Hesitation problem (5/6/2008 3:48:33 PM)

Ok, if your confident in your fuel system (although I think you sould triple check)  then you might consider the ignition.  This can get really complicated and if you don't have a power probe and DVOM you can forget doing it yourself.  One of your coils might have a loose signal wire connection or is possibly producing a weak intermitten spark.  I would check resitance across the coils to start and then go through the Clymer or Haynes diagnostic procedures for the ignition system.  When you hve a problem like yours it suck because you can't re-create the issue when the bike is standing still.  When you got issues like this you gotta go by the book and just check everything until you find something questionable.  Your issue could very well be electrical, could be as simple as a loose battery connection or short.  I feel for you man.  If you don't have one already then get yourself a Clymer or Haynes but if you have nothing more then a basic tool set then you best bet might be to just take it to the dealer.  If you are confortable working on your ride then your gonna save a lot of money, but its going to take time.  You've got to resign yourserlf to really pulling the bike apart so you can access all the elctrical devices and connections.  I know from experience on my bike that the electrical plug connections on these machines do little to prevent corrosion so you need to pack EVERY ONE with di-electric greese or you've got problems waiting to happen.  I could type a list a mile long (already have) of things it could be but its not going to help you much, you just gotta fallow the manuals troubleshooting section and hope for the best.  Again, if you can be more descriptive with the problem it might give us all a better direction to go in.  Also, there is always the chance your new pump has an issue where it is going on and off power.  Sorry man, wish I could help you more.  Keep us posted

stynkmonkey -> RE: Hesitation problem (5/6/2008 5:41:13 PM)

I'll double check the pump to make sure it's working good then I'll start with the electrical connections and move out from there. It's not a huge issue it runs good and idles good just whenever I cruise (at whatever speed, be it 35 or 65) it hesitates and surges a just a little bit and not even every time. Like I mentioned earlier the best way to describe it is like I got hit by a strong gust of wind. I was hoping someone would point to the filter since it was the cheapest fix. 

stynkmonkey -> RE: Hesitation problem (5/7/2008 2:56:24 PM)

Ok I think I may have found the culprit. Any suggestions


[image]http://img.photobucket.com/albums/v650/Masticator/IMG_0214-1.jpg[/image]


Do I need a new wiring harness or a new Reg/Rec or both and does anyone know if any other wiring harnesses from any other year 900's will fit mine. I have a 93-94 front end with the dual headlights?

stynkmonkey -> RE: Hesitation problem (5/7/2008 3:27:29 PM)

I also noticed that the battery conector with the 30amp fuse that goes to the starter from the reg/rec is also fragged. Anyone got a wiring harness for sale? and how do I test the reg/rec to see if it's bad?

Ghusar -> RE: Hesitation problem (5/7/2008 4:36:19 PM)

Believe it or not I had the sam problem I had to rewire because a small bottle of AXE got between the Reg and overheated the wires all better now I just redid the wiring took about an hour

stynkmonkey -> RE: Hesitation problem (5/7/2008 6:38:25 PM)

Did you just cut out the bad wires and get new ones? How can I tell if it was just bad grounding or if the reg/req is fried.

Manic -> RE: Hesitation problem (5/8/2008 5:35:42 AM)

There was just a post about that yesterday, I tossed up a link w/ a trouble shooting chart, should still be near the top.

I just say a wiring harness on evil bay yesterday, might still be there.  Looked like it was going to go cheap.

stynkmonkey -> RE: Hesitation problem (5/8/2008 5:39:43 AM)

The only one on there I could find was for a 98.

  

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