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January 18, 2020
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I'm also on a Piaggio X9 scooters forum (I used to have 2 Piaggio X10's, but not at the same time) there has been a few horror stories of what happens when the built-in immobiliser won't let it run
All the things you want to do to get it going are exactly what it's trying to stop a thief doing 
Mike H --
Murphy's 4th law of motion states that any small object that is accidentally dropped will immediately hide itself under a larger object.
July 1, 2018
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As a general rule an immobiliser would stop the injectors pulsing/stop fuel pump running rather than cut the spark?
As the fuel pump seems to be priming I dont think it's that.
Unless your trying to say its nicked?.🤣
Who wants to put money on the ECU being scrap?
What's 7/16 in mm again?
January 18, 2020
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No what I was intimating was other people having bought a non-runner scooter then the headaches of sorting the faults. Security was just an example.
Here I agree with the others it doesn't make sense the spark can't get past the HT lead.
Mike H --
Murphy's 4th law of motion states that any small object that is accidentally dropped will immediately hide itself under a larger object.
July 1, 2018
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Maybe a new ht lead would fix it?Certainly wouldn't hurt.Im guessing it's got one and it isn't coil on plug.Really hard to say without seeing it in the flesh.Ive nothing else to add I'm afraid 
What's 7/16 in mm again?
January 18, 2020
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Have just seen this (again)
So, pattern coil, standard little job, connect it up -
What are the chances Honda have done something sneaky so that you have to fit their own OEM (and likely much more expensive) coil? Wouldn't put it past them.
Also, it is quite likely it's CDI, and if so it's also possible the coil resistance has to be right else it won't want to play.
As been said your HT tester may be lighting up but that's no guarantee there's enough Volts to make an actual spark. (?)
Vendor of pattern coil may well say it's suitable for so-and-so but is it really?
Mike H --
Murphy's 4th law of motion states that any small object that is accidentally dropped will immediately hide itself under a larger object.
June 23, 2013
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Do you still have the 'faulty' coil? Might be worth trying if you have. If the results are similar it would suggest the fault is not the coil, but further back.
I was fooled by the Pantheon when I first tried to start it, pulled on the rear brake and nothing happened. I then realized you needed to PULL on the brake lever (there's a switch for brake lights, then the safety switch further back...)
April 19, 2018
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Oddly, Bob, the accursed thing will fire up if you pull on either front or back brake contrary to online instructions. Thanks to yourself and the wonderful Mr Mike Foster, I now have some documentation including a workshop manual in italiano! Plus a user's manual in English. When I get a break from egg painting/rolling etc I will peruse them and attack the beast with the multimeter. The original coil unfortunately is damaged pretty badly. One of the terminals gas corroded away due to bring stored after being out in the salt and grit. I'll see if it has any id on it to unravel the puzzle.
Thanks again all for your help 👍
'55 D3 Battery; '58 Square Four (project); '59 D1 direct lighting plunger; '59 Tiger Cub; '60 5TA; '76 FS1-E; '91 GTR 1000; '97 Honda Sky SGX50.
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