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Discussion Starter #1
I put my Arrow Thunder on my 07 as soon as I bought the bike. Along w/a BMC air filter. My bike randomly stalls. However, since I upgraded the bike immediately, I don't know if it's a result of my setup or something else wrong w/the bike. Seems to only do it @ only low RPMS. I can usually "feel" the bike about to do it. I will even stall @ idle sometimes. & once it does start stalling, it stalls & stalls, & stalls & gets progressively worse.

It's only when Idling or coming to a stop that it does it. I have to be ultra paranoid when i am stopped & keep it revved to about 2500 rpm or else the bike is often likely to stall.

I have no power commander. I did NOT have the dlr install the race chip as i read from a few posts on here that it destroyed the gas mileage. Being the bike is all but a daily driver for me, I didn't want to have to stop for gas all the time.

Does the bike need to be tuned after installing these things? I know that I could get more HP & better power curve by having it properly tuned, but is it neccessary?

Would a power commander & one of the maps downloaded from PC's website fix it?

The MV Agusta dlr where I'm having the bike serviced is fairly new to the brand & I don't think they've had enough time to experience any common quirks these bikes might have.

Thanks in advance for your input.

On a lighter note, the Arrow Thunder looks & sounds GREAT!
hahaha
 

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your bike needs to be tuned with all the changes. My 910r had the same issues when we put the factory race exhaust on. The solution for me was to switch back to the factory chip instead of the race chip and then tune the bike. It took them a while to figure this out.
 

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If the bike has been prperly tuned, then it sounds like the fuel tank vent system is restricted. Have you noticed it is worse when the tank is full?
 

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Discussion Starter #4
The bike has had no tuning. The pipe & air filter were installed w/out any adjustments.
 

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jessewallace said:
The bike has had no tuning. The pipe & air filter were installed w/out any adjustments.
At the very least, you need to have your idle trim and TPS set, and possibly throttle body synch. You probably need a race chip, or power commander to compensate for all the changes made in engine breathing. Get to the dealer or competent Italian bike tuner.
 

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If I may interject, I have and still continue to have the same problems as jessewallace. (I too have the Arrow shorty, BMC, and iridium plugs.) I have the race chip on my R, plus I have a PC Commander AND I had the bike dynoed. ProItalia refused to put on the PC Commander (citing, though it doesn't void the warranty, any mods to the bike, such as exhaust, filter, EFI module or plugs automatically change the "very precise" tuning of the bike.) I think I have the worst mpg of any Brute R here on the board, a meager 17mpg. With the dyno, I now get 20mpg. And, like jessewallace, my bike stalls when de-accelerating, downshifting, accelerating from a full stop or slowing to a stop. Once, it took a full three seconds to kick over from a cold start. I'm baffled and frustrated at having to, like him, ready myself for the inevitable engine cut off while riding. I could easily have the bike re-dynoed (and after reading Airfuel's lengthy explanation of how a dyno SHOULD be performed (on another post)), I start to wonder if the dyno I got was performed correctly or if it could be yet another Brutale bug.
 

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Discussion Starter #7
I just got off the phone w/the dlrship who is looking into the problem now & asked them if they thought my stalling might have something to do w/my aftermarket exhaust setup / BMC air filter. They said they had already wondered that & when they hooked it up to the computer everything was in it's proper parameters.

I also forgot to mention earlier that I sometimes hear an noise right before it stalls that sounds like air pressure being released. it is very faint & very quiet, but the guys at the dlrship have heard it too.

The only reason I haven't put the race chip in is b/c the drop in gas mileage that so many people complain about. 20mpg isn't really acceptable on a daily driver motorcycle. :)
 

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Discussion Starter #8
Anybody have a tuner they could highly reccomend in the south FL area to properly tune my brutale?
 

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Can't speak to your exact set-up, but can't believe the bikes would not need some adjustment after installing MUCH more free flowing exhaust as well as a high flow air cleaner. A good technician who knows these Magnetti Marelli systems is needed.

Regardless of that, the sound you hear....I go back to the possible pinched fuel tank vent hose. Have you ever noticed you have to pull open the gas cap against a vacuum when refueling? Does your stall problem seem worse when the tank is full? These would indicate your pump is struggling to pull gas out of a sealed up tank generating vacuum and possible low flow, hence stall at short injector duration periods (idle).

Just a thought....good luck. My 910r has stalled exactly twice. Both times just after fill up and pulling to a stop. Both times in the week before I un-pinched the vent hose I inadvertanly misrouted when I had the tank off before whilst installing my alarm system. Otherwise, 3500 miles of pure bliss and reliable power. Oh, yeah... and 31~35 mpg.
 

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Assuming that the tank vent hoses aren't pinched , and you aren't filling the tank so high that you are filling the charcoal canister full of gas , have your tech check the exhaust CO reading . If the CO's are too high the bike will stall , this problem gets worse as the bike warms up . When idling you can sometimes hear a small backfire into the airbox right before the bike stalls .
 

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910S'er buttin in here. I have the Arrow and the BMC, didn't change the plugs. Never had issue with stalling prior to tune, just a good deal of burble and pop ( I guess it was running lean). Got it tuned and all that went away, throttle is much nicer as well.
Here's a thought, after my tune the throttle position sensor either went bad or was nocked lose (from removing the tank I guess??). Anyway, the bike would stall at about 190deg f, as soon as I would pull the clutch. Once the sensor was fixed all was fine. Think that could be happening? Just a thought. Hope you get it cured. Happy New Year.
 

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Change Exhaust & Air filter should be turning.
It is neccessary.
If not so,certainty have problem.
like stalls ,instable power & others.
Use power commander can adjust by yourself(if not have a fit map),but not accurate unless to turning on dyno equipment.
 

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Hello to all,
I had my 06 910S since May of this year. After hitting around 250 miles, I installed the Arrow Thunder without any problems. Just load and cool looking. After reaching 600 miles, I took my bike to ProItalia to get the 600 mile service. While I was there, I brought along my BMC air filter because I heard on this forum that its sometimes tricky to install. I'm no hardcore rider or a mechanic so I asked them to install it. Pick up my bike and rode it home. After existing the freeway, my bike stalled at the light. Hum? What the......? That night when going out, warming it up, it stalled again. I noticed that when I rev of up the bike the downward rpm went slow. Called ProItalia, and told me to bring it in. ProItalia being so far from me and not having time to take it in, I finally took it in last week. Guess what they found? 2 of my pistons had a vacume leak. I don't know exactly what that means but it was fixed. Now it sounds even better and rides stronger and the downward rpm goes down alot faster. You might wanna call them. Hope this helps.
 

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i've got a 2006 910s with the arrow shorty pipe and bmc air filter, and i have experienced the same thing. my mechanic installed, and then removed an f4 (race?) chip. although it hasn't stalled since re-installing the stock chip, it definately tries to at times whether the tank is full, empty or in between. my guy is helping me keep tabs on the "issue". other than that, the thing screams to the rev limiter.
 

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Can't speak to your exact set-up, but can't believe the bikes would not need some adjustment after installing MUCH more free flowing exhaust as well as a high flow air cleaner. A good technician who knows these Magnetti Marelli systems is needed.

Regardless of that, the sound you hear....I go back to the possible pinched fuel tank vent hose. Have you ever noticed you have to pull open the gas cap against a vacuum when refueling? Does your stall problem seem worse when the tank is full? These would indicate your pump is struggling to pull gas out of a sealed up tank generating vacuum and possible low flow, hence stall at short injector duration periods (idle).

Just a thought....good luck. My 910r has stalled exactly twice. Both times just after fill up and pulling to a stop. Both times in the week before I un-pinched the vent hose I inadvertanly misrouted when I had the tank off before whilst installing my alarm system. Otherwise, 3500 miles of pure bliss and reliable power. Oh, yeah... and 31~35 mpg.
Not doubting ,but have to question your MPG's 31-35? At what RPM do you ride at? I am lucky if I get 21MPG's w/910s! Please explain?:popcorn: Oh, Ya until I get another new tank my bike stil stalls, so can't give any insight.
 
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