VTX Plug Fouling Cure - VTXOA
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post #1 of 13 (permalink) Old 09-02-2008, 03:28 AM Thread Starter
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VTX Plug Fouling Cure

I found this article while doing a search for another subject. After reading this I realized it may be of interest to many owners of early 02 VTX's besides myself. The problem is I cannot relate to what hose the writer is referring to "under the right side bottom of the fuel tank". Can anyone tell me what hose the writer of the article is referring to? I don't think it is the gas tank vent hose. Besides, the vent hose is under the left side of my 02.

Thank you,
Jack


VTX Plug Fouling Cure!
Recently, I was thumbing through the service manual for my 2002 VTX-180OC (VIN sequence 6125, mfg 06/01) when I realized it was time for a plug change. After a trip to the local dealership for four NGK IFR5L11 plugs (at a list price of $15.99 each), I pulled the right front plug to start the change process. Imagine my surprise when I saw that the plug, though similar in size, had quite a different electrode. The following Monday, I checked with the service department at the dealership. I wanted to know why my bike had come from the factory with other than the specified plugs.

The service manager explained that some of the early production VTX1800s had a fouling problem (of which I was aware) and that Honda had used the different plug from the time when, they discovered the problem until the fix was implemented. The actual problemthat caused the plugs to foul was a kink in a hose under the right side bottom of the fuel tank. He was unable to tell me what the hose was, but he did point it out to me on a floor model. Seems that the nose was cut too long, and when it was put into the allotted space, the extra length caused it to kink. This kink was the culprit in the early fouling problems. The "work around" plug wasn't any better at stopping the fouling, but it did a much better job of working when fouled, which is why Honda used it as a temporary fix. Sure enough, when I checked my bike, the hose had a nifty kink in it. The solution was simple, though. Just trim the hose until it was able to fit without kinking. The biggest hassle in the fix was fitting a pair of cutters into the limited space available. It's worthy to note that the plugs that Honda originally put in the bike were somewhat fouled when I pulled them, however, the fouling never caused any rideability problems. The plugs, according to the service manager, could be used as a straight substitute for the IFR5L II for the life of the bike without problem (or loss of performance).

But, here's the kicker: The NGK BKR5Eli plug that came from the factory with my bike list for $3.79 each. The set of four would be less than one IFR5L11. Hope this clears up the plug dilemma for my fellow VTX'ers.

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post #2 of 13 (permalink) Old 09-02-2008, 05:12 AM
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Re: VTX Plug Fouling Cure

My 02 had the same fouling problem but was given the hotter plugs to resolve the situation. I don't remember any hose on the right side and I'll check again soon.
Wonder if it has something to do with the desmog junk I took off???????????????


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post #3 of 13 (permalink) Old 09-02-2008, 09:05 AM
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Re: VTX Plug Fouling Cure

I'll be interested in hearing what the spark guru's think of this... I've read a lot on the subject and this is the first time I've heard that someone suggested the original plugs were NOT the culprit of the original problem.

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post #4 of 13 (permalink) Old 09-02-2008, 09:27 AM
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Re: VTX Plug Fouling Cure

Quote:
Originally Posted by Apache
Can anyone tell me what hose the writer of the article is referring to? I don't think it is the gas tank vent hose. Besides, the vent hose is under the left side of my 02.
Must be pair valve or cc vent, neither would foul a plug on a tight motor, sounds like another dealer blowing smoke.

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post #5 of 13 (permalink) Old 09-02-2008, 10:09 AM
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Re: VTX Plug Fouling Cure

Quote:
Originally Posted by dbx
Quote:
Originally Posted by Apache
Can anyone tell me what hose the writer of the article is referring to? I don't think it is the gas tank vent hose. Besides, the vent hose is under the left side of my 02.
Must be pair valve or cc vent, neither would foul a plug on a tight motor, sounds like another dealer blowing smoke.
That sounds like more about what I was thinking.


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post #6 of 13 (permalink) Old 09-02-2008, 12:47 PM Thread Starter
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Re: VTX Plug Fouling Cure

I'm thinking along the same way that it's a service manager blowing smoke. I did a complete desmog and pair valve removal so there are few hoses left under the tank.

Jack

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post #7 of 13 (permalink) Old 09-02-2008, 03:38 PM
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Re: VTX Plug Fouling Cure

Quote:
Originally Posted by Apache
I'm thinking along the same way that it's a service manager blowing smoke. I did a complete desmog and pair valve removal so there are few hoses left under the tank.

Jack
1+
My thoughts exactly. I did the total desmog years ago on my 03R. I don't have a fouling problem on mine.
But, these machines have never produced the prettiest plugs.

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post #8 of 13 (permalink) Old 09-03-2008, 10:01 AM
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Re: VTX Plug Fouling Cure

If there was a hose that was a bit too long, instead of replacing the plugs Honda would of had the supplier come in and trim all the hose stock. I've been a Honda supplier for over 10 years and a automotive designer at Honda Research and Development for 6, they would not spend money on a hotter plug to fix/counter a supplier hose issue. I see smoke as well!

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post #9 of 13 (permalink) Old 09-03-2008, 01:32 PM
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Re: VTX Plug Fouling Cure

I don't Know about the hose but I buy my plugs at the advance auto. About $5 each

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post #10 of 13 (permalink) Old 09-03-2008, 02:09 PM
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Re: VTX Plug Fouling Cure

Why would this "kinked" hose cause plug fouling? I fail to see how a kinked/pinched hose will cause plug fouling. Maybe running the wrong octane or a electrical problem but a kinked hose.
I'm open for any ideas.....

M STAR KMA
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