gilera sc 125 no spark

grant1312 · L Plate Warrior Joined: 23 Jun 2018 Karma :

im giving up hope with my bike.

how does one bike have so many problems. had a running bike then gets mot now have non running bike get it running again insure and tax bike it kills a head gasket buy and fix that now no spark i have new coil/ht lead, new spark plug and cap , new stator, new reg/rec it seems every proplem you fix another is created.

anyone have any ideas ive checked the connectors and bypassed the kill switch to rule those out.

thanks for the help

grant1312 · L Plate Warrior Joined: 23 Jun 2018 Karma :

done some more testing today

impluse coil 290ohms spec is 250
charging coil 745ohms spec is 730
generating coil 615ohms spec is 600

coil primary 0.6ohms and secondary 5.11k ohms

also im getting 0 volts to the coil with the ignition on and i get a static 0.22v while the starter button is pressed and when i let go it goes back to 0v

anyone have a guess why im getting no spark?

bikenut · World Chat Champion Joined: 21 Nov 2011 Karma :

have you done any painting ??

you have a manual and a wiring diagram ?? so you know a bit more as to what type of ign system you have.

ac volts outputs from stator ?? res values seem close to spec......

some "lt" output to the ht coil, but no spark at the plug, you have a red noen plug cap that flashes when ht goes thru it, much more reliable than just resting the plug on the engine when testing.......can be used when actually riding the bike and you can "see" the flash in the dark. Engine stats to play up like its running out of fuel AND flashes are intermitent, ign system fault....example.
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nuts about bikes

grant1312 · L Plate Warrior Joined: 23 Jun 2018 Karma :

no painting and yes i have a spark tester on there and no flashing also tried a brand new plug just incase, really have no clue what it could be. Sad

give me a mechanical problem over electrical any day Laughing

jaffa90 · World Chat Champion Joined: 06 Apr 2016 Karma :

Have you any safety cut out switches that can kill the spark only?

grant1312 · L Plate Warrior Joined: 23 Jun 2018 Karma :

only the kill switch on the handle bar as far as i can see

grant1312 · L Plate Warrior Joined: 23 Jun 2018 Karma :

one new thing i have noticed is if i push the start button once i let go the power valve motor re does it test like i have just turned the key switch on when first going to start the bike.

scratch that the bike is no longer doing that Sad

stephen_o · Spanner Monkey Joined: 02 Aug 2011 Karma :

defective battery? not able to crank or generate a spark?
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current scoot 2009 Yamaha YBR250 + Current Pootle 2013 Nissan Leaf

grant1312 · L Plate Warrior Joined: 23 Jun 2018 Karma :

i have tried a known working battery still no luck

also just rechecked the volts going into the coil if i check live in > battery earth i get 0.34 v but if i go live in to coil earth i get nothing is that a bad coil?