no spark at all on 50cc sym jet euro sport By dazzalad (Read 11,771 times)

[dazzalad]

hello all my sons ped its got no spark at all at plug ive pulled two wires from coil and multi metered them while turning bike ove no reading and i even put a bulb on them thinking it would glow lol got to try as i got no clues so ive now made a puller and removed the cover to stator plate two wires on the coil pack ive put multi meter on them them and there is current going aroung the coils so somwere up to the two wires going to coil pack i hope i my problem but ive run out of clues is there a cdi and were will it be
i will add my mob and i will be on the bike eve at 6 each eve till its fixed
one thing for sure its going wene its fixed grrrr as its the first time any thing had gone wrong and its a 07 plate
my mob [phone]

[Alleyoop]

Does the scooter have a KILLSWITCH on the right handgrip Switch? If so make sure the KILLSWITCH is on the run position. There is a CDI and it could be anywhere some are up in front under the cowl by the headlights some close to the COIL by the frame.
Also some have a safety switch on the sidestand so make sure the sidestand is up.
Alleyoop

[dazzalad]

only has a main stand i think it starts on that also switch is in on poss as i have had bikes and you have to pull break lever to start what will cdilook like i have no idea all ive had are r1 and blackbirds and i sent them in to repair i asked a dealer and they dont want to touch it as he says it might coct half the bikes value so true as well
i did find behind the battery a siler box about 25 mill square its got for wires going to it two red and two others god knows what it is but wires are not small

[Alleyoop]

This is a REGULATOR/RECTIFIER it charges your battery and also handles some of the lighting.


This is a CDI it handles sending the Voltage to the COIL to fire the PLUG.



This is a RELAY(SOLENOID), it sends juice to the starter When you squeeze the brakes and hit the start button:

[rob63]

Oct 23, 2012 14:34:45 GMT -6 dazzalad said:

i did find behind the battery a siler box about 25 mill square its got for wires going to it two red and two others god knows what it is but wires are not small

That`s probably the flasher unit, however the cdi should be nearby. You normally have to remove the battery and battery box (one 10mm bolt), and the cdi is in a rubber bracket or floating around right behind the battery box. They do burn out after a while especially on the euro`s. I think it`s the larger version which looks something like this....

[dazzalad]

will take battery of tonight is there a way of testing it pluss in ipswich we have no sym dealer so will have to try ebay

[rob63]

I`ve never tested one, always had one lying around to swap. As you say, ebay is your best bet. We`ve got a sym jet euro sat idle in the workshop, as even the importers/distributors to the UK don`t seem to have a cdi on the shelf, ten day wait while they order one in from abroad.

[dazzalad]

i just done the strator plate test i followed the wires from that to a push fit fittig uncliped it and put the meter on test ie beep lol and got a beep however wene we started the engine over i got no reading on the meter set at 20 ohms if ikick start it sends a very light reading i had not looked for the cdi yet as all i see behind battery is oil tank will have a look later but is it the stator plate should i get a reading while its turning over even though it does a sound test while static
sorry about poor spelling and way ive wrote it all i go to work all day and come home to a dead ped so just want it going so he gets it sold and out of my hair lol

[rob63]

I don`t think I`ve ever had a problem with a stator on a Sym, other than when a crank bearing went kaput and the flywheel mashed up the stator.
I think the euro has an 11 pole stator, with two sets of wires running from it. One set which is 3 or 4 wires for charging, go to a multi plug and then on to the regulator. The other set is just two wires which provide the spark and go to the cdi. This is only a recollection from the mists of time however.
Whenever we`ve had a no spark problem it`s always been either a split HT lead, duff plug or cap, duff coil or knackered cdi. The cdi being the most prominent as the rest seem to give an intermitent spark rather than a complete loss.

[dazzalad]

just put multi meter on the two wire in a loop no current i even put the metre on one wire at a time with the meter on the earth on the two wire that go to spark and these are the only two wires that come out of the stator at all looking like its going to garage as i keep coming home from work and ever time i open the garage door its starting to haunt me now lol

[Alleyoop]

It could be as simple as the Ground Wire from the frame to the Motor so check the ground wire from the frame to the motor it may not be making good contact on the frame and or motor or its frayed or broke.

It probably has a 6 or 8 pole stator I do not believe it would have an 11 pole stator, the 11+ pole stators you normally will find on 250+ scoots and or high end scoots. This is a simple 2 stroke scoot. The CDI would not be special unless it is a DC CDI and you can test if it is a DC CDI. On the CDI on the TWO PLUG CONNECTOR the bottom one put a VOLT METER on it and SEE IF IT READS 12Vs if it reads 12vs then it is a DC CDI if not you can get just about any AC CDI from anyone and get it within days same with the COIL.
Alleyoop

[rob63]

It probably has a 6 or 8 pole stator I do not believe it would have an 11 pole stator

The euro has a lot more poles than a normal 50, a bit annoying for us especially on parts commonality as we have a mixed fleet. The Sym Jet Basix has a 6 pole, I`m assuming that the Euro has more because it has no light switch, the headlights come on as soon as the engine starts.
The cdi is also different from the Basix model which has a standard size AC cdi. The Euro one is larger, we`ve tried a Basix cdi on a Euro but it just coughs and farts but doesn`t run.
Oddly enough, the Basix model which is simpler and cheaper, is by far the more reliable of the two models.

[dazzalad]

happy days after making a puller to remove the flywheel to show me stator motor i almost gave up as it was booked in a garage so i thought i would remove a bit more plastic to keep the bills down i removed the tail unit to get at cdi unit i removed it thinking all good i can take it in to repair i noticed that two plugs went in to cdi and there was a wire cut well i thought get the wife in garage i put the wire lose in the plug by hand told her to start the bike and bingo it jumped into life so i soldered it in place taped it up put bike plastics all back and that was all of the sides and rear no bolts spare lol and happy days
big thanks to those who replyed and helped and pushed me along
cheers all and happy peding i bet i saved him £200 with labor and bits and bless him he offered to by his dad a bottle of wine on part time money i am just happy its running again
big thing is do we sell or keep it

[rob63]

Nice one bud.