Fuel leak problem 2002 F4 Senna - MVAgusta.net
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post #1 of 26 (permalink) Old 04-18-2017, 11:18 AM Thread Starter
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Fuel leak problem 2002 F4 Senna

Hey guys...
Driving me crazy - - - I have replaced every seal and every hose in the tank. the bike is still leaking fuel.

Starting to think it is the tank itself. This bike sat for many years full of fuel before I owned it.
Bad gas caused me to replace every thing inside the tank when first purchased. I was great for a few years - then the fuel leak.

MV Miami has replaced everything again.. all the seals the hoses the pump the sensor - - no luck.

Has there been a problem with F4 tanks failing? I look inside and can see seam sealer - is that a possibility?
I do not use ethanol fuel anymore - but running it was the norm for many years.

Will MV reseal my tank if I send it to them? seems to be leaking down faster now then before.
Thanks,
Jeff

2000 F4S 750 Neiman Marcus SE
2002 F4 750 Senna SE
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post #2 of 26 (permalink) Old 04-18-2017, 11:53 AM
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Check the Maintenance and Tech tip section mate, lot's of threads on this topic.
Do you realy feel MV should take responsibility for a tank that maybe more than 13-14 years old ?
FWIW - No the F4 steel tanks are not prone to leaking through the body - surely you can see what it looks like inside - or find where the fuel leaks from ?

Or just buy another one, heaps on the market.

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post #3 of 26 (permalink) Old 04-18-2017, 01:04 PM
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Quote:
Originally Posted by pacecarjeff View Post
Hey guys...
Driving me crazy - - - I have replaced every seal and every hose in the tank. the bike is still leaking fuel.

Starting to think it is the tank itself.
Jeff

Jeff, where is the evidence of tank leakage? i.e. where do you see fuel?

Keep your words soft and sweet, for someday you shall eat them....
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post #4 of 26 (permalink) Old 04-18-2017, 01:53 PM Thread Starter
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Do you realy feel MV should take responsibility for a tank that maybe more than 13-14 years old ?
absolutely not - - I am willing to pay- just thought the original manufacturer might do that work, if it is a known problem.

It is dripping down to the bottom of the fairing then on to the floor can't tell from where yet- - gonna remove the body work tonight and try and pressurize the tank.

The 2 specialists went through everything

2000 F4S 750 Neiman Marcus SE
2002 F4 750 Senna SE
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post #5 of 26 (permalink) Old 04-18-2017, 03:43 PM
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Do not pressurize the tank!!!!!

That tank will deform with very little pressure.

Gravity is your friend.

Fill the tank, open the lid, use a flashlight (for God's Sake no flame!), and look for the source. If it is from the fuel pump plate, the drips will show up on the lower left corner of the tank.

Keep your words soft and sweet, for someday you shall eat them....
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post #6 of 26 (permalink) Old 04-18-2017, 03:50 PM Thread Starter
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Originally Posted by silentservice703 View Post
Do not pressurize the tank!!!!!

That tank will deform with very little pressure.

Gravity is your friend.

Fill the tank, open the lid, use a flashlight (for God's Sake no flame!), and look for the source. If it is from the fuel pump plate, the drips will show up on the lower left corner of the tank.
OK - thank you.

2000 F4S 750 Neiman Marcus SE
2002 F4 750 Senna SE
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post #7 of 26 (permalink) Old 04-18-2017, 10:00 PM
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Hahaha - "No Flame" so funny but so possible, I've seen a woman do that, she so "lucky" that her husband back-handed her before she got the lighter close enough to the tank.
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post #8 of 26 (permalink) Old 04-19-2017, 12:42 AM
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I had a strange leak once, so on the off chance it's the same....
It was the o-ring on the connector that goes into the tank, not the one that was on the connector but the bit of old o-ring that was stuck inside the fitting in the tank.
Didn't leak until the fuel pump pressurised.
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post #9 of 26 (permalink) Old 04-19-2017, 04:24 AM Thread Starter
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this leaks while just sitting- it is coming out on the left side pooling near the kickstand.

2000 F4S 750 Neiman Marcus SE
2002 F4 750 Senna SE
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post #10 of 26 (permalink) Old 04-19-2017, 04:41 AM
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When I had those symptoms it was the overflow hoses.
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