Put in new BMC air filter and now it only cranks ['08 910R] - MVAgusta.net
 
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post #1 of 8 (permalink) Old 09-29-2016, 04:29 PM Thread Starter
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Put in new BMC air filter and now it only cranks ['08 910R]

I just replaced the factory air filter from 2008. Bike is otherwise stock Euro 3 spec.


Fuel pump is priming (pump sound and bubbles in gas tank)
Battery has been charged (after each draining attempt to fire up)
Air box sensor cable is connected
All fuel tank hoses were connected with new o-rings and appear to be routed properly
Fuel tank sensor cable connected
Fuel tank drain hose connected

She keeps cranking until the battery dies

Edit* Fuel return tube (black union under tank) is spotting some fuel. Wrong o-ring size? It looked very similar in size to the stock (6.8mm x 1.9mm for the replacement vs 6mm x 2mm for the original I believe?)

Last edited by livelloliquido; 09-29-2016 at 04:40 PM.
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post #2 of 8 (permalink) Old 09-29-2016, 06:57 PM
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Welcome to the forum mate.
If you're seeing bubbles in the fuel tank, then you have one of two probable issues.
Either that fuel fitting that's dripping fuel is sucking air, or you have a fuel line popped off in your tank.
You should only see a gentle movement of fuel in the tank as the system releases pressure, no bubbles.

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post #3 of 8 (permalink) Old 10-01-2016, 12:05 AM
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Agree with Donsy, but the dislodged hose is not always visible by peering into the tank from above.You need to remove the tank and pull the fuel pump. The hose is not clamped so pop a clamp on it.
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post #4 of 8 (permalink) Old 10-01-2016, 09:08 AM
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This happened to me and I took the advice given (after spending hours checking electrical switches and relays) and checked the fuel pump, found the hose from the pump to the fuel filter had come off, if this is the case check the condition of the hoses as mine had deteriorated badly and needed to be replaced.
Best thing about asking on this board is the advice given is always the easiest and most common fixes first so do what is advised and they will have you fixed up in no time.
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post #5 of 8 (permalink) Old 10-01-2016, 04:09 PM
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you may or may not have bubbles in the tank.....

they are caused by cavitation of the fuel in the passages (Google it)

air can't be sucked in......the system is pressurized to 43.5 PSI/3bar...... unless you're

down to the last few ccs of fuel


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post #6 of 8 (permalink) Old 10-20-2016, 08:35 PM Thread Starter
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That was it Donsy. The hose between the filter and the pump came loose. Started right up after that. Thanks guys
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post #7 of 8 (permalink) Old 10-20-2016, 11:28 PM
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Glad to hear you're sorted mate.

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post #8 of 8 (permalink) Old 10-21-2016, 05:47 AM
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livelloliquido, now that you've joined and got your 910 going again, stick around and share the fun!

Oh, and we all love looking at pics otpf each other's bikes too!!

And where are you located?

I used to be fast....now I just dream about it.
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'08 910R (Gina), '04 F4 SPR #275 Track Bike (Lola), YSR50 (The Rabbit), '71 CB100 (Lil' Red), '75 RD350C (Orange Bird) restoration project, 2015 Indian Chieftain (Rita) my "low-n-slow", '70 Suzuki F50 (Baby Blue), 2018 Suzuki GSX-S750L8 (Susie Q)
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