09' Leaking fuel ???

Jeckle · Sep 8, 2009

09' FE450 is leaking around where the fuel regular is screwed in the tank, the gasket looked fine and was in the groove, but the tank seems to have a little to much flex in that area.

The bike has been making a hissing sound like the motor was hot, but it been vapor escaping around the regulator the whole time, good thing I noticed the dripping.

Has anyone else noticed this at all ?, and what was the fix ?

sabink · Sep 8, 2009

RE: 09

Yes, I had the same problem. The area cannot be tighten easily, as the black plastic is very tight on the screws. I drilled the black plastic so that the screws pass without problem, put some vaseline on the rubber seal and tighten it back in place. Also it is important to have unrestricted fuel breather line, because when the fuel boils, it will generate a lot of gases. It's good to heat insulate the button of your fuel tank so that there is less gasses, as the gasses may close the breather valve and hold pressure.

johny · Sep 8, 2009

RE: 09

i had the similar problem replace or removed the petrol cap valve the pressure built up so much in my tank it was unbelievable when i took the cap off the pressure that was released sounded like a jet

Jeckle · Sep 8, 2009

RE: 09

My bike even came with the billet cap, maybe a little drilling is in order.

I'm installing the "tank cool" kit along with there pipe cover made from the same stuff.

omo · Sep 9, 2009

Valve

Take off the valve on the fuel breatherhose, it sticks, there's already one inside the cap.

cimwill · Sep 9, 2009

Yes, remove the one way valve in the vent hose or when shes boiling good you will have fuel spraying out from the pump plate on the bottom of the tank or if the tank is pretty full and you open the cap it will spray up and over you. There really should be a relief valve built into the cap.

Chris

Jeckle · Sep 9, 2009

There was no valve on the hose when I got it. I don't believe trhe billet cap has a valve, I'll look again.

NKW570 · Sep 9, 2009

Factory cap has no valve in it, like jeckle says, and it works great.
Put a short vent cap on mine , so if pressure does build up, then you can pull it off without removing the cap. Simplicity is best.
First thing to do with those crappy push button caps is remove the plastic ball .
I give the push button caps, Worst design award of the decade :x

Clay · Sep 9, 2009

The vent hole in the billet cap is too small. I double the size of the hole and it helps to keep pressure from building too high.

NKW570 · Sep 10, 2009

Re: Valve

omo said:
Take off the valve on the fuel breatherhose, it sticks, there's already one inside the cap.

Its the ball valve in the cap thats the problem, you need to remove that first, then get rid of the standard vent hose and replace with a freeflo hose that is two way , or just put the tube back on with no valve and accept a bit of fuel seepage if its on its side.

Nick

Jeckle · Sep 10, 2009

RE: Re: Valve

I drilled the screw holes out slightly and the regulator tightened up good, did the same to the billet cap and were back to the trails and the hissing is gone.

After watching that gas leaking on my hot exhaust in the middle of no where, I'm thinking this bike needs liabilty insurance.

Jeckle · Sep 14, 2009

RE: Re: Valve

Found 90 % of the problem. If you pull the reg up and put a sraight edge across where the holes go in to the tank you'll see that the tank plastic has stretch between the holes and the sealing surface is sagging into the tank.

I shaved some of the plastic off where it had heaved round the holes so the reg can pull down flat again and the leaking has stopped for now. I think between the the preasure build up from the cap and the heat from the un-sheilded mid-pipe in that same area this a weak link was bound to surface.

motorcare · Sep 14, 2009

I had an ongoing problem with leakage on my '09 450 at the regulator plate. The lower left screw seemed very finicky about tightening torque to keep from leaking. Turns out that the blind hole the screw enters into has a defect and is not sealed from gas in the tank. Because the hole is outside the plate gasket there is nothing to keep it from leaking up through the threads. In my case, the slight warp-age of the tank at the screw holes actually helped to seal the plastic of the tank against the plate. The more I trued the plastic up the worse it leaked. I ended up using a type of insert to reestablish a true "blind" hole and all is well. Having the holes a little small in the plate seems like a good way to help keep people from over tightening the screws and could aid in alignment.

Smorgasbord · Sep 20, 2009

One thing that would be useful would be a tank wear protection panel for the -09 and -10.
The tank gets rubbed by the bootleg and there is a risk that you rub a hole in the tank. The pre 2000 had the same problem so it's surprising that they missed it on the -09 and -10 models. The frame is beautifully covered by plastic protectors for boot wear protection, they could just easily have extended these to protect the tank as well but they didn't.

09' Leaking fuel ???

Help Support Husaberg:

Jeckle

sabink

johny

Jeckle

omo

cimwill

Jeckle

NKW570

Clay

NKW570

Jeckle

Jeckle

motorcare

Smorgasbord

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