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Author Topic: x8 125 shorting fuse  (Read 11374 times)
bulb182
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« on: November 24, 2015, 22:15:04 »

Hi, can any one give me some ideas.
My Piaggio x8 125 keeps blowing the 15 amp fuse it sparks and blows every time I try and put one in, the fuse is for the recharge of the battery, lights etc. the ignition don't even turn on, I have checked the earth and its clean and splits in the wire and checked the loom as far as I can and it all seems in tact no exposed wires. Any one got any ideas?
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Dave Milnes
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Fylde Coast


« Reply #1 on: November 25, 2015, 08:00:25 »

Assuming you have the battery polarity correct...
Disconnect the regulator output and see if that cures it, in which case the regulator is dud.
As it's a fuse that protects circuits permanently live when the battery is connected and not one that requires a circuit to be switched on first, it has to be something to do with the input/output directly from the battery.
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2004 X9 500 Evo in YELLOW - 2016 Maxsym 600i Sport
Anderton 2004, Pen-y-cae 2005, Matlock 2006, Hay on Wye 2007, Minehead 2008, St Florence 2010, Newent 2011, North Kyme 2012, Betsw-y-coed 2013, Hardraw 2014, Parkend 2015, Whitby 2016, Mundesley 2017, Derby 2018, Telford 2019, Loch Doon 2020, Cumbria 2021.
bulb182
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« Reply #2 on: November 25, 2015, 14:59:56 »

Thanks Dave, I unplugged the regulator and put the fuse in it went in ok without a blowing I plugged the connectors back into the regulator and the ignition and lights came on and it turns over but don't start, I also have a spare regulator (only reason is spare as I thought I had a regulator problem last year) which I plugged the connectors into that too, but it still don't start and still turns over.
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Dave Milnes
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« Reply #3 on: November 25, 2015, 15:22:57 »

Check the other fuses as one may also have blown.
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2004 X9 500 Evo in YELLOW - 2016 Maxsym 600i Sport
Anderton 2004, Pen-y-cae 2005, Matlock 2006, Hay on Wye 2007, Minehead 2008, St Florence 2010, Newent 2011, North Kyme 2012, Betsw-y-coed 2013, Hardraw 2014, Parkend 2015, Whitby 2016, Mundesley 2017, Derby 2018, Telford 2019, Loch Doon 2020, Cumbria 2021.
bulb182
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« Reply #4 on: November 25, 2015, 15:46:18 »

All the fuses are fine, also getting a good spark.
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Dave Milnes
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« Reply #5 on: November 25, 2015, 18:46:14 »

Must be fuel related then.
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2004 X9 500 Evo in YELLOW - 2016 Maxsym 600i Sport
Anderton 2004, Pen-y-cae 2005, Matlock 2006, Hay on Wye 2007, Minehead 2008, St Florence 2010, Newent 2011, North Kyme 2012, Betsw-y-coed 2013, Hardraw 2014, Parkend 2015, Whitby 2016, Mundesley 2017, Derby 2018, Telford 2019, Loch Doon 2020, Cumbria 2021.
bulb182
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« Reply #6 on: November 25, 2015, 19:21:47 »

thanks Dave I thought that too, that will be my next job on my dinner hour tomorrow.
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bulb182
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« Reply #7 on: November 27, 2015, 14:26:34 »

I have taken the fuel pipe off the carb, and turned the bike over an petrol comes out the pipe, so then I checked the diaphragm and that seems fine and all in good nick.
where would be the next best place to look with out taking the carb off?
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Mike H
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« Reply #8 on: November 27, 2015, 16:14:48 »

Basics, take plug out after trying to start it, see if it's 'wet', i.e. has petrol on it ~ if yes, then it's not sparking altho plug may do so outside of the engine, either duff plug or HT or coil insulation problem. Could also be timing problem but wouldn't have thought so in this day and age of electronic ignition etc. ~ if plug is not wet, then petrol is still not getting thru for some reason, maybe carb strip-down req.d


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Murphy's 4th law of motion states that any small object that is accidentally dropped will immediately hide itself under a larger object.
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