What makes the 910R stall when the fan comes on? - MVAgusta.net
 
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post #1 of 8 (permalink) Old 12-01-2006, 08:46 PM Thread Starter
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What makes the 910R stall when the fan comes on?

pc iii-usb installed today
dyno done
idles at 1300..... smooth as glass
when the fan comes on, the bike stalls, almost instantly

why is that?



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post #2 of 8 (permalink) Old 12-01-2006, 09:10 PM Thread Starter
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in trying to logically think about this

it is as if.... when the voltage decreased to the PC III as the fan came on.... the bike died

is that possible?
is it to be expected?



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post #3 of 8 (permalink) Old 12-01-2006, 09:18 PM
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i would have to think it has something to do with where the idle is set

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post #4 of 8 (permalink) Old 12-01-2006, 09:20 PM Thread Starter
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Quote:
Originally Posted by Matty
i would have to think it has something to do with where the idle is set
i'm pretty sure that it has been idling at 1300 before and after the pc iii/dyno.

should the bike's rpms DECREASE momentarily after the fan comes on?



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post #5 of 8 (permalink) Old 12-01-2006, 09:40 PM
 
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Without being too obvious, fan has to be shorting something out, which in turn is causing th engine to die. Its either affecting the fuel system or igniton, right? Its impossible to diagnose this over the internet, bring it back to the tuner and tell him whats wrong, or just ride without the fan....
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post #6 of 8 (permalink) Old 12-01-2006, 09:44 PM Thread Starter
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Quote:
Originally Posted by Some Guy
Without being too obvious, fan has to be shorting something out, which in turn is causing th engine to die. Its either affecting the fuel system or igniton, right? Its impossible to diagnose this over the internet, bring it back to the tuner and tell him whats wrong, or just ride without the fan....
sounds great to me
i appreciate it



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post #7 of 8 (permalink) Old 12-02-2006, 04:10 AM
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It's just the extra load placed on the alternator at the point when the fan starts, it's just dragging the engine speed down, don't forget the manual says to set the co level with the fan(s) running.

It's something to do with what you dyno man has done, with your other losing torque issue as well I think I may be firing a few f***s into him

(This reply has not been checked for punctuation, grammar, or spelling mistakes and is devoid of any big long cleverwords or condescending manner)


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post #8 of 8 (permalink) Old 12-02-2006, 05:07 AM Thread Starter
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Quote:
Originally Posted by mikef4uk
It's just the extra load placed on the alternator at the point when the fan starts, it's just dragging the engine speed down, don't forget the manual says to set the co level with the fan(s) running.

It's something to do with what you dyno man has done, with your other losing torque issue as well I think I may be firing a few f***s into him
back to the dyno shop it goes
next week

i'll see what can be done

i appreciate your thoughts and help



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