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Discussion Starter #1
My Brutale got towed 3 times for the same reason.
It has bugged me enough that I need to seek help from fellow members.

The engine cuts off at anytime, any engine temp, any fuel level.
I can't start it once it dies. The bike shop checked the bike with a
Diagnostic program and no problem at all with the spark plugs, ECU,
ignition timing and air/fuel ratio.

My checks at every engine cut-off:
- Fuel level
- Engine temp
- Fuel pump

Remarks: Something I found very strange everytime the bike gets
towed. It starts up again when the bike gets back to the bike shop.
From the result, the bike starts up again when the engine is cold.

Does it matter if I install a RapidBike (similar to Dynojet PCIII)?
Would that be the problem causing the ECU to cut off the engine at anytime?
Do you guys have the same problem with your Brutale?
 

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If you have installed an aftermarket fueling device (RapidBike or similar) the first thing I would do would be unplug it and see if the problem recurs.

No, this is not a common problem.
 

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Tim, so it is still happening? i remember it happened after our short ride together...

Like Ed said, I think the RapidBike may be the issue, I had a PCIII on my 03 R6 gone bad, the symptom was that the bike would die without warning, it died while I was on the freeway the 1st time for no reason, the 2nd time it actually caused slow speed crash as I was making a u turn with throttle open slightly, the engine braking from the suddenly dead bike caused the bike to jerk and drop.

later it was determined that it was a faulty unit and there was a factory recall. after the replacement there was no more issues.

good luck.
 

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Discussion Starter #4
If you have installed an aftermarket fueling device (RapidBike or similar) the first thing I would do would be unplug it and see if the problem recurs.

No, this is not a common problem.
Tim, so it is still happening? i remember it happened after our short ride together...

Like Ed said, I think the RapidBike may be the issue, I had a PCIII on my 03 R6 gone bad, the symptom was that the bike would die without warning, it died while I was on the freeway the 1st time for no reason, the 2nd time it actually caused slow speed crash as I was making a u turn with throttle open slightly, the engine braking from the suddenly dead bike caused the bike to jerk and drop.

later it was determined that it was a faulty unit and there was a factory recall. after the replacement there was no more issues.

good luck.
Thanks guys, I'll do that and see how it goes.
 

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When you say engine cut-out, are you losing all electrical power to the bike?

If that's the case then it's more than likely the SPU, which IS a common problem with 750 Brutales.
 

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When you say engine cut-out, are you losing all electrical power to the bike?

If that's the case then it's more than likely the SPU, which IS a common problem with 750 Brutales.
I'll bet 99.99% is IS the SPU (CDI/Fuse box, whatever).

My bike began doing this last March, and the dealer and importer ran through EVERYTHING trying to avoid the obvious. New SPU, no problems.

I feel for you, it's incredibly dangerous, and honestly, even though mine was fixed, it was one of the main reasons I sold the bike. Losing throttle at 75mph on a freeway ramp, going up a steep mountian road around a blind corner, dying at a stop light in the mleft lane of a 6 lane street, and haveing to push the bike across 50mph traffic to the sidewalk, dying on a arterial next to a concrete wall with no shoulder--All of these happened, and many others, and scared the piss out of me and made me lose complete confidence in the bike, not to mention the meetings and classes I missed while waiting for a tow, or the bike to decide to work again.
 

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A wod of advice--STOP RIDING THE BIKE. It can die at any moment, in any situation, and it's not worth the risk. You could easliy be taken out by a truck, or...well anything really.

If they won't replace the CPU, ditch the bike. Sorry.
 

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Discussion Starter #8
A wod of advice--STOP RIDING THE BIKE. It can die at any moment, in any situation, and it's not worth the risk. You could easliy be taken out by a truck, or...well anything really.

If they won't replace the CPU, ditch the bike. Sorry.
I'll bet 99.99% is IS the SPU (CDI/Fuse box, whatever).

My bike began doing this last March, and the dealer and importer ran through EVERYTHING trying to avoid the obvious. New SPU, no problems.

I feel for you, it's incredibly dangerous, and honestly, even though mine was fixed, it was one of the main reasons I sold the bike. Losing throttle at 75mph on a freeway ramp, going up a steep mountian road around a blind corner, dying at a stop light in the mleft lane of a 6 lane street, and haveing to push the bike across 50mph traffic to the sidewalk, dying on a arterial next to a concrete wall with no shoulder--All of these happened, and many others, and scared the piss out of me and made me lose complete confidence in the bike, not to mention the meetings and classes I missed while waiting for a tow, or the bike to decide to work again.
When you say engine cut-out, are you losing all electrical power to the bike?

If that's the case then it's more than likely the SPU, which IS a common problem with 750 Brutales.
Speaking of the SPU (IS), are you guys saying it's the fuel injector
fuse failing? If that's the case, why wouldn't an electronic diagnostic
program pick that problem up? Or would the program only check the
fuel injectors (themselves)?
 

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Speaking of the SPU (IS), are you guys saying it's the fuel injector
fuse failing? If that's the case, why wouldn't an electronic diagnostic
program pick that problem up? Or would the program only check the
fuel injectors (themselves)?
I don't know exactly what is does, but there is a relay inside the fuse box that is failing--We were able to hear it click on and off when we were trying to troubleshoot the bike in the shop, after towing it back home (100 miles) for the third time (spent a whole day with the shop owner trying finally to solve it). It's not serviceable, though maybe it could be bypassed?
Getting a new box took 2 months a year ago; I assume it's nearly impossible now.
 

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My PC111 did that on my S4Rs, I was thinking a bad kickstand switch but it turned out being the PC, it stopped doing it as soon as we took it off. Dynojet won't replace anything unless you threat to sue in case of an accident. The box was replaced in no time and the problem went with it.
 

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Discussion Starter #11
Mechanic in the bike shop said, the regulator is about 2+ years old..
It could be the problem causing bike to cut-off engine. Could be
malfunctioning causing the ECU to verify the electrical failure.

My interpretation could be wrong since the mechanic spoke to me
in Chinese.
 

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Discussion Starter #13
They have just found out it's not the regulator that's failing.
It could well be the headlight bulb, previous owner changed
the bulb to a "superbright white" bulb with higher wattage (It
has higher wattage than what it says.) So hopefully it would
be bulb killing the battery causing the engine to cut-off with
insufficient battery voltage to run the electricals. But it is yet
to solve the problem. Everything has to be checked before doing
test-rides.

It sort of makes sense when the bike is going fast, everything
goes very well but when the bike is either going slow or stopped
at traffic lights, it dies.
 

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Discussion Starter #14
What a surprise!

New problem found, the whole relay box (including all the different relays inside) had to be replaced.
What a pity, another $500USD spent before selling it.
 

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Hy Tim. Did you solve the problem? I am asking because my Brutale 910R randomly stops when is hot over 75degrees - max 95 degrees and always when at idle. Never when running on the rode at over 2000rpm s. But after it dies it starts right off. No trouble starting. Any suggestions? Thx!
 

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@BrutalSebi .... You do realize this thread is 11 years old and the OP was selling the bike????
You probably have your idle speed too low. Start another thread or look for answers on more recent ones.
 
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