98 valkyrie just shuts down after about a 35 to 40 mile ride

[Poppahobbs]

Are there any suggestions of what I can check for .  So far it has started back up after it sits for about 5 minutes and gets me back home but, Now I'm afraid to go on much of a ride until I can find what is causing the problem.

[keepinon]

Sounds like the vent tube for the fuel tank is plugged up. Had that problem with mine a while back, mud dauber had closed the hose up. Ran fine after cleaning.

[R J]

Vent line squished shut.

Ya had the gas tank off recently?

If so you have kinked that rubber tube somewhere, find the vent line on the tank & gently pull on it.    Should straighten it out.    Common mistake for a 1st timer.

[Poppahobbs]

Thank,s for your responses I thought I checked it the other day maybe I wasn't on the right line or didn't do a good job I'll look again first thing in the A.M. But if you have any more thoughts Let e know and i'll check them to I.m not happy with it the way it is...

[TomE]

The early GL1200's had a similar problem. My friends' 1200 Interstate had this problem. It would run for 30 minutes, shut down, and five minutes later, you could start it and ride home.

I changed both crank sensors and cured it. I can't explain why both sensors seemed to die at the same time, but that's what it did.

[tank_post142]

try running it with the fuel cap open, if it runs fine then it is the vent.

[Bone]

If it dies again open the gas cap you might hear a release of pressure if the vent is plugged.

[Fudd]

Check the screen above the petcock going into the tank.

[MP]

If it dies again open the gas cap you might hear a release of pressure if the vent is plugged.

I believe it would suck in from vacuum, not release pressure.

Stick a black plastic wire tie in the cap, and close it, then try it.  That will allow some air to go in the cap while riding.

MP

[Chrisj CMA]

If its not the vent, its a failing vacuum line or vacuum side of the petcock. That is exactly how my bike was acting when the vacuum side of the petcock went out.

I switched ot a Pingel and life is mush better, That OEM valve is the worst part on the bike

[Bone]

If it dies again open the gas cap you might hear a release of pressure if the vent is plugged.

I believe it would suck in from vacuum, not release pressure.

MP you are correct. It neutralizes pressure between the vacuum in the tank and the normal air pressure.

[six2go #152]

If its not the vent, its a failing vacuum line or vacuum side of the petcock. That is exactly how my bike was acting when the vacuum side of the petcock went out.

I switched ot a Pingel and life is mush better, That OEM valve is the worst part on the bike

Ditto! 

[Poppahobbs]

Well I tried the tie wrap in the gas cap trick today and went for a ride and it did it again at about 27 miles.  I opened the gas cap but did not hear any sound of a vacuum release. I tried to start it as soon as I opened the gas cap and it would not start.  After waiting about 5 minutes it started and I rode it back home.  It doesn't start sputtering it just seems to start loosing power and then dies.  Does anyone else have any more ideas any  help appreciated.

[R J]

Buy a Pingel or a rebuild kit for that worthless petcock Honda came out with.

[Thunderbolt]

16953-MV9-000 I think this is the current part no.

[MP]

Buy a Pingel or a rebuild kit for that worthless petcock Honda came out with.

+1.

If not vent tube, then it is the petcock starting to fail.  Do the cover set replacement, or go to a Pingel.  Your choice.

MP

[six2go #152]

Buy a Pingel or a rebuild kit for that worthless petcock Honda came out with.

I would go for the Pingel. My 98 was doing the exact same thing 2 or 3 years ago, rebuilt the original petcock and it happened again the next Summer. Put in a Pingel & no more issues.

[Mr.BubblesVRCCDS0008]

You could also convert the stock petcock to a manual valve and try it that way. Very easy to do, mine has been that way for over four years now.

[sugerbear]

ya, that piece of cr#p vacuum petcock only last so long. like 8-10 years(mostly).

what was honda thinking when they built something that would wear out that soon.

[fiddle mike]

Are there any suggestions of what I can check for .  So far it has started back up after it sits for about 5 minutes and gets me back home but, Now I'm afraid to go on much of a ride until I can find what is causing the problem.

In-line fuel filter?

[One_Eye]

Also, check the wiring harness where it goes into the ECU under the left side cover. Mine was doing exactly what you said, and the wires were loose going into the plug on the harness. You'd just touch it lightly and the bike would die. Sometimes start a minute later, sometimes longer. It depended on how long it took to wiggle the wire to connect again by cranking or rolling it since the harness sits right on the frame there and takes a lot of vibration and impacts from bumps. Took me a lot of stalls to find it. I kept blaming everything else these guys keep talking about and going through that stuff over and over.
Good luck
Randy

[Fudd]

Check the screen above the petcock going into the tank.

Have you checked this screen?  You have the exact same symptoms that I had.

[John Schmidt]

Have to agree with One-eye, plus possibly the ECM itself malfunctioning when it gets hot. Wouldn't be the first time. Another item to check might be the pickups off the trigger wheel, but usually it will be only one messing up. I'd get a decent digital voltmeter and attach it to one of the coils, any one will do, then go for a ride. Tape the meter to the tank or the seat where you can see it. Watch the meter output and see if it drops about the time the bike quits. That will tell you if it's in the ignition or not. If that is OK, then I'd go to fuel delivery. Do you have a quick disconnect in the fuel line coming off the petcock? If so, does it have a low spot in the line? That will cause starvation on some bikes, especially when fuel is low in the tank. If you have that disconnect with a low spot in the line(more prone to vapor lock as well), try redressing it in such a way as to have fuel flowing downhill at all times. Just a couple things to look for before pulling it all apart.

Good luck, keep us posted on what you find.

[John U.]

You may be able to confirm or eliminate a clogged intake screen by switching to reserve when the bike starts acting up. If it straightens out it's a clogged screen. Reserve pulls from a lower portion of the screen which is less likely to be clogged.
An inspection mirror and a flashlight will help check the tank for rust. Even without rust, a load of bad gas can have all kinds of junk in it.

[Roadog]

Yes..I too believe the pet rooster is restricting the fuel flow and runs the bowls empty..it just  'runs out of gas' .  After a few minutes sitting  (it won't take long having zero fuel demand ) to refill the fuel bowls.  Go pengle..I did and no problems. 

[John Schmidt]

Go for a ride and take a screwdriver with you. When the bike quits, turn off the petcock. Then, using the screwdriver, open each bowl drain one at a time and see if you get anything drain out underneath the bike. If not, then you do have a fuel delivery problem. If you do get gas draining out, then it's something else beside fuel delivery. May still be a problem with it, but not the total problem, possibly the low spot in the line I spoke of earlier.

[John U.]

Yes..I too believe the pet rooster is restricting the fuel flow and runs the bowls empty..it just  'runs out of gas' .  After a few minutes sitting  (it won't take long having zero fuel demand ) to refill the fuel bowls.  Go pengle..I did and no problems. 

What I don't understand is if the engine quits because the fuel bowls are empty, and the bike has an OEM petcock,
what supplies the vacume to open the petcock and allow the fuel bowls to refill?
Unless the petcock is screwed up and is flowing fuel without vacume. Of course if that was the case the bike wouldn't have died to begin with and we are back at the starting point. 

[John Schmidt]

So Poppahobbs, we're waiting! Any luck yet on finding the culprit?