May Have Lost Engine - MVAgusta.net
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post #1 of 19 (permalink) Old 07-20-2019, 11:00 PM Thread Starter
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May Have Lost Engine

2007 F41000R with only 12k miles on it. Been gently used for the past 6 years that I've owned it. Rode to work today and while coming home on the interstate, rolling around 80 mph the engine suddenly died. Didn't hear anything particularly bad but I didn't have my earplugs in so the wind noise pretty much blocked everything. Waited 3 hours for AAA to arrive with one of their nifty motorcycle-only recovery trucks. Got home and first thing I checked was the fuel pump and hoses. Everything looks good: pump cycles and shuts off, no fuel pumping around inside the tank. All gauges and electrics appear normal and the engine cranks but won't fire and also sounds a little funny when cranking. Afraid I lost the cam chain but with such a low mileage motor plus the upgraded cam chain tensioner done by the previous owner it seems strange.


Any advice/tips will be appreciated. I'll start investigating tomorrow but with another bike on my lift table undergoing an engine rebuild, I'll be limited to what I can do with the bike on the ground.


Day started out great and ended up sucking big time!


Eric
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post #2 of 19 (permalink) Old 07-21-2019, 12:06 AM
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The oil will tell a lot.
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post #3 of 19 (permalink) Old 07-21-2019, 12:20 AM
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Greetings Eric,

First, check the usual, your engine is most likely fine.

1. battery age and strength
2. clean terminal and engine grounding point
3. side stand switch

Questions to ask yourself regardless
1. Fuel line age
2. Injector line age
3. Fuel filter age/miles
4. Clean fuel pump screen
5. Pull, inspect and reseat all your fuses

E d w a r d B4910s08


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post #4 of 19 (permalink) Old 07-21-2019, 04:53 AM
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Let the oil out and go from there, if its ok, continue the checklist.

You said you hear abnormal noise on startup?
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post #5 of 19 (permalink) Old 07-21-2019, 02:43 PM
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Well, I would think the rattle of the cam chain would bring you to write about that first and not the that you have lights. Odd noise, Ummm it would be greater than an odd noise to end up finding the aftermath in your oil. A slapping chain most likely would have been heard at the start of your ride before a catastrophic moment occurred with munched metal bits. Keep in mind 'most' mv engines crank and start rather quickly. When they don't one can tune into noises as trouble but in reality, most likely, they are normal cranking noises. A clear rattle is not normal. A whine is not normal. If the mod was made by someone lacking skills and understanding well then... yea drain that oil. Anyway, you have some checking to do.

Adding this relating to cam:
https://www.mvagusta.net/forum/13-br...tml#post278418

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Last edited by Edward; 07-21-2019 at 04:25 PM. Reason: Adding thread about cam chain mishap bending valve.
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post #6 of 19 (permalink) Old 07-21-2019, 08:33 PM Thread Starter
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A quick update: I haven't been able to do much checking but I can say that when cranking there aren't any funny noises coming from the engine but it does seem to spin fast. Of course since it normally starts right away I don't have a baseline for comparison. Also, all electrics function normally: sidestand light and everything else. Could be ignition related since the fuel pump is operating normally. I'll start checking fuses soon.


Unfortunately, I won't be able to do much else until I get the bike up on my lift table. Bad knees won't allow me to work down low these days!


I've read the threads about the cam sprockets shearing their retaining bolts and am hoping that's not my problem. I'd think there would be some serious noise coming from the motor when cranking if this were the problem but not having experienced it before I could be wrong.


Thanks for the support and advice.


Eric
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post #7 of 19 (permalink) Old 07-21-2019, 08:45 PM
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If you can take your time, protect your knees! We are all here so no worries.

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post #8 of 19 (permalink) Old 07-22-2019, 06:08 AM
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Before you do anything brash.... pull the pump out and check the hoses. What you experienced (sudden power loss while cruising) is exactly what happened to me one day...and it was the fuel hose coming off the pump. Hard to really tell by just looking into the gas cap.
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post #9 of 19 (permalink) Old 07-22-2019, 01:50 PM
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2007 sounds like euro 3, check cam sensor/connections. without signal will not start

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post #10 of 19 (permalink) Old 07-27-2019, 06:02 AM
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Definitely sounds like an electric problem to me. Unfortunately they can be some of the hardest to diagnose. I’m not familiar with the MV but from experience with other bikes It sounds like it’s getting fuel so I would be looking at sensors, ignition and safety cut off switches such as side stand switch etc as they trigger ignition inhibitors which would cut the engine out. I’d also be checking coil pack wiring and ht leads for secureness in the first instance, then check the coil packs are receiving a signal and ignition fuses.) do you have an alarm/immob fitted? Could be playing up, it’s not uncommon.

Good luck
Nito

Last edited by Nito; 07-27-2019 at 06:10 AM.
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