brutale 910 butterfly balance - MVAgusta.net
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post #1 of 14 (permalink) Old 06-03-2017, 12:44 AM Thread Starter
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brutale 910 butterfly balance

Hi friends, I have a question about how the correct way to balance between the two pairs of butterflys with the central balance screw, Do the central or external cylinders match? thanks!
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post #2 of 14 (permalink) Old 06-03-2017, 06:26 AM
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Have you read the engine manual? It outlines the procedure.

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post #3 of 14 (permalink) Old 06-05-2017, 06:57 AM Thread Starter
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Well, I am referring to information found here: MV Agusta FAQ: Tuning 2) Idle, Base CO and Throttle Body Balance

when he says: The vacuum readings from cylinders 2 and 3 are the ones I use for this – I ignore cylinders 1 and 4 at this point. I suppose it refers to the inner cylinders.
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post #4 of 14 (permalink) Old 06-05-2017, 07:19 AM
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@refeixon: The cylinders are numbered 1-4 from left to right across the head.

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post #5 of 14 (permalink) Old 06-05-2017, 08:49 AM Thread Starter
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True, my doubt is that in the brutale when connecting the vacuum hoses gives as a result that the order in the vacuometer is 2-1-4-3 counting from left to right. This is my doubt
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post #6 of 14 (permalink) Old 06-05-2017, 09:59 AM
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What device are you using? A standard vacuum setup gives reading as you hook up the hoses. 1,2,3,4 left to right. Follow the hoses.

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post #7 of 14 (permalink) Old 06-06-2017, 01:21 AM Thread Starter
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If I connect the vacuometer to cap 1, the reading appears in the second column of the vacuometer starting from the left, cylinder 2. If I connect the hose to cap 2 the reading in column 1. Appears the same with cylinders 3 and 4
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post #8 of 14 (permalink) Old 06-06-2017, 03:25 AM
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You might need to raise the tank up (required if you need to make an adjustment anyway) and check the hose routings to establish if someone has not put the correct caps on...

Last edited by revhead1957; 06-06-2017 at 03:25 AM. Reason: Grammar
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post #9 of 14 (permalink) Old 06-06-2017, 05:42 AM Thread Starter
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Ok, thank you, I'll check what happens with vacuum lines
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post #10 of 14 (permalink) Old 06-06-2017, 06:47 AM
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What vacuum device are you using?

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