Replace/repair petcock and fuel filter? Or other recommendation

[RckyMtnRider]

So after I rebuilt the master clutch because it was leaking, I took my 99 IS out for the day. Full tank of gas, rode from Parker to downtown Denver to watch the Rockies play the Dodgers (Rockies lost), bike worked great. On the way back the IS acts like it runs out of gas. I made sure the petcock was in ON position, moved to RES, still won't start. Moved back to ON, tried the choke, bike sounds like it might start. No go, have to be towed. Still won't start the next day.

So, now where to start. Should I replace the fuel filter and replace/rebuild the petcock. Or, is there another recommended starting point? If I replace fuel filter and petcock, do I go OEM or aftermarket?

Any recommendations would be appreciated.

[hubcapsc]

You think it is gas and not electric, and you're there so you're probably
right... does the horn blow strong? Could your battery or alternator
be the cause? You could use a multi-meter to check if your alternator
is charging...

bike sounds like it might start. No go

A Valkyrie with a battery too weak to start the bike will happily turn the
bike's starter for a while...

You could take off the gas line and the vacuum line. Add some kind of
drain line hanging down from the gas nozzle on the petcock. Use another
piece of line to suck a vacuum on the petcock. If a healthy amount
of gas starts shooting out, that's how much a Valkyrie needs. If it
drizzles out or none comes out, there's a problem. Try it on both
ON and RES maybe...

-Mike

[gordonv]

You need to find where the problem is 1st, before trying to fix something, or you could just be throwing $ at nothing.

Bike died, like fuel starved, sputtering out, while riding. Played with petcock.

On the way back the IS acts like it runs out of gas. I made sure the petcock was in ON position, moved to RES, still won't start. Moved back to ON,

So you let the bike die before trying the petcock positions? you want to do this while it's still running. My petcock from on-off, still feeds. from res-off, 2.5 miles later starts sputtering.

How much fuel in the tank? open the cap and listen for air release. suspect vent tube pinched, the tank was off.

Moved back to ON, tried the choke, bike sounds like it might start. No go,

So the engine is cranking, strong, and sputters a little, like it has fuel? try jumping from a known good battery, engine NOT running.

I would pull the fuel line, and apply a vacuum to the petcock and check for fuel, after the above.

[Chrisj CMA]

If you mean change fuel filter that you have an extra fuel filter (in line)  Yes, remove that and see if it is the problem

[RckyMtnRider]

Found the problem. Pinched bleeder line on tank. I didn't think it would be that because I rode it for about two hours before stopping for the game.

Thanks for the comments.

Jeff

[Harryc]

Found the problem. Pinched bleeder line on tank. I didn't think it would be that because I rode it for about two hours before stopping for the game.

Thanks for the comments.

Jeff

Bleeder line ... are you talking about the vent?

[RckyMtnRider]

Yes. It's called the bleeder vent line in the Clymer manual I have.

[gordonv]

That is exactly what happens. Full tank of gas, and when it gets around/less than half a tank, the air vacuum inside the tank holds the fuel inside, and gravity no longer acts upon it.

I remembered you saying you had the tank off.

Tank back on, and it pinches the air line closed, causing the vacuum.

Open the cap, and you hear the air rush in. Pinched line!

Drive the bike with the cap open, closed with a straw tucked in, which brakes the seal.