Poor performance and unusual noise under load, help! - MVAgusta.net
 
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post #1 of 8 (permalink) Old 09-24-2013, 06:02 AM Thread Starter
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Poor performance and unusual noise under load, help!

hi guys, I have a 2005 brutale 750s and I had an issue this afternoon on my way back home. I was riding and the bike was running ok a weird knocking sound started, I had no power on my lower revs and the engine sound like a v12 after 4000 revs bike was back to normal.
On neutral gear sounds good but when I choose to go sounds weird and has no power,
has anyone experienced something similar?
is it possible to sound like that because of bad quality gas?
anyway I fill up my tank with 98 octane gas tonight maybe it will change tomorrow
please help!!!!
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post #2 of 8 (permalink) Old 09-24-2013, 07:07 AM
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Quote:
Originally Posted by frankq View Post
hi guys, I have a 2005 brutale 750s and I had an issue this afternoon on my way back home. I was riding and the bike was running ok a weird knocking sound started, I had no power on my lower revs and the engine sound like a v12 after 4000 revs bike was back to normal.
On neutral gear sounds good but when I choose to go sounds weird and has no power,
has anyone experienced something similar?
is it possible to sound like that because of bad quality gas?
anyway I fill up my tank with 98 octane gas tonight maybe it will change tomorrow
please help!!!!
Frankq, Welcome to the family !!!
I moved your question to its own thread, which is more appropriate than adding it into someone's else's F4 thread for a different problem.

Unfortunately, the sounds you describe are probably something other than a tank of bad gasoline. Hopefully I am wrong. Let us know what you find and give us some more info so we can try and help.

I used to be fast....now I just dream about it.
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post #3 of 8 (permalink) Old 09-24-2013, 12:06 PM
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Does the 2005 Brutale 750 have the exhaust valve? It switches around 4k rpm. Would it cause this effect if seized or the cable let go?

Speed is relative, but fast is fast.

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post #4 of 8 (permalink) Old 09-24-2013, 12:31 PM
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Bad coil, spark plug, TPS sensor (bad a/f ratio or timing).
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post #5 of 8 (permalink) Old 09-24-2013, 12:32 PM
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Originally Posted by Reckler View Post
Does the 2005 Brutale 750 have the exhaust valve?
No, it doesn't. Only the latest model MVs have that.

I used to be fast....now I just dream about it.
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post #6 of 8 (permalink) Old 09-24-2013, 01:23 PM
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I would say there's a plug fouled as well or something else as well. I had a similar problem this spring and it was just one of the spark plugs had come disconnected. Pushed back on and all was well.

Adding power makes you faster on the straights, while subtracting weight makes you faster everywhere - Colin Chapman

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post #7 of 8 (permalink) Old 09-24-2013, 02:44 PM
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post #8 of 8 (permalink) Old 09-25-2013, 12:59 PM
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Quote:
Originally Posted by frankq View Post
hi guys, I have a 2005 brutale 750s and I had an issue this afternoon on my way back home. I was riding and the bike was running ok a weird knocking sound started
"What was that?" - Jake

"Threw a rod." - Elwood

"Is that bad?" - Jake

"Yep." - Elwood

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