Why won't my SYM Jet motor scooter start?

by Paul
(Derbyshire, UK)

original one on bike

original one on bike

original one on bike new one off same year??

I have a 2006 05 reg SYM Jet Euro X 50cc moped.

When I last rode it (a week ago) it ran OK but felt a bit lumpy. I smelled an electrical burning smell, so pulled the front cover off and noticed the relay with the red and green wire was very hot, I waited till it cooled down and inspected it and found the ceramic? was blackened and cracked...

I replaced it with another one from the same year and model and it was different? The one on the bike was 2 bars connected with a bracket with the green wire in 1 and the red wire in the other. The new one is only one bar with the wires on either end...

I also replaced the battery and the fuse (which had blown). All it does now is turn over and eventually floods (strong smell of petrol). There is a constant spark (after I dried and cleaned up the spark plug), but it just won't fire up on the button or kickstart.

Please help as I'm really needing this bike to work.

Comments for Why won't my SYM Jet motor scooter start?

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Dec 29, 2017
resistor NEW
by: Anonymous

can any one tell me what part does the resistor play with in the bike does it have any thing to do with the auto choke my sym jet 50 is hard to start from cold runs fine when you get it running i have had the carb ulta sonic clean and all set up the plug is running a light tan color so all is well there thanks

Nov 14, 2015
michael NEW
by: Anonymous

y wont my scooter start up she wants to but she just not ticking over at all any ideas

Oct 12, 2014
Tune NEW
by: Anonymous

Tuning the carburator might do the trick.

Oct 11, 2014
sym jet NEW
by: Anonymous

I have a sym jet euro x 100 it dosnt start on it's own battery but dose off car when engines one but still take time for it to start any ideas plz

Jul 23, 2014
sym jet NEW
by: Anonymous

In 2006 roughly sym changed the sttling of the sym jet basix, known as a sym jet euro 50 x, parts for these bikes are avaiable as i have a W reg ped, search stm jet basix, this will give you all the parts you need, scooter works and CMPO are good sites for both the new and old model

May 22, 2013
sym problem NEW
by: brend

my sym jet 50 euro x has just had a engine rebuild new choke and spark plug plus battery was running then cut out and wont start up has a spark but smells like it is flooding and ideas ???

May 22, 2013
sym problem NEW
by: brend

my sym jet 50 euro x has just had a engine rebuild new choke and spark plug plus battery was running then cut out and wont start up has a spark but smells like it is flooding and ideas ???

Sep 21, 2011
Sym Jet resistors
by: tuxster

The 2-bar type resistor is a standard part of a Sym Jet Basix. Funny that your Euro X is fitted with it, when the one for the Euro X is the single bar resistor.

I would suggest purchasing the 2-bar type resistor for the Sym Jet Basix as this was the one you pulled out from your scooter.

Hope this helps.

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