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[BazaJT]

A while ago I bought a Lexmoto 125 as a none running project.The engine turns on the starter and there's good compression,but no spark at the plug.So far it's had a new plug,coil/plug lead,cdi unit and stator.Given that I know nothing of vehicle electrics does the regulator/rectifier have anything to do with the spark or is it just to deal with battery charging/lights etc.?

[Rods2]

Check what triggers the spark, bike equivalent to miggy crank sensor!

[YZ250]

Does it have a 'kill switch' and if so has this been checked/bypassed? If it is faulty it would 'ground' the coil, preventing any spark. 

This goes for a side stand switch as well, if fitted.

[BazaJT]

It should have a side stand switch,but that along with the sidestand itself is absent.Yes it does have a "kill"switch,so I'll have to try checking that out although it does have quite a positive action to it.The two wires for the sidestand switch I've bridged together in case it was that,would that be acceptable?

[YZ250]

It should have a side stand switch,but that along with the sidestand itself is absent.Yes it does have a "kill"switch,so I'll have to try checking that out although it does have quite a positive action to it.The two wires for the sidestand switch I've bridged together in case it was that,would that be acceptable?

I believe that should be ok. 
My way of thinking is that the side stand switch 'connects' when bypassed by joining together and the kill switch 'grounds' when joined together. So, I assume that to test the kill switch you could simply remove a wire. 
Have you got a multi-meter to test for continuity?

[EMD]

Does it have a 'kill switch' and if so has this been checked/bypassed? If it is faulty it would 'ground' the coil, preventing any spark. 

This goes for a side stand switch as well, if fitted.

Those kill switches caused many problems on the old CB250NDX  Always spraying wd or something into the switch when it rained .. worked for a while but replaced the switch and all good again for a while . Oh probably didnt help using it to make the engine backfire 

[BazaJT]

No multi meter,however I'll look into disconnecting a wire-can't hurt-last time I rode a bike they weren't fitted with such things you just simply turned them off to stop them!Heck even disc brakes were only just beginning to be fitted on bikes when I packed in riding

[EMD]

 

[BazaJT]

Pretty close that one.Last bike I had was an Ariel model VB a 600cc sidevalve single with magneto ignition.Mis time letting valve lifter go when kick starting and it was a real leg breaker-well so I'm told

[BazaJT]

Further tinkering on my part has resulted in my getting power to the coil.Using a test bulb[one of the indicators]clipped to the coil wires/terminals reveals that on spinning engine over on starter bulb flickers on and off.Still no spark at plug though.So a duff coil/plug lead,which on closer inspection I now find is in fact a used one and not new as the bikes seller had told me.An alternative I suppose is that when they replaced coil they connected the wires to the wrong terminals,physically this is possible but what would be the consequences?

[Field Marshal Dr. Opti]

A fine V-Twin you have there, Mr Emd.

[BazaJT]

It now runs!!After much tinkering about replacing a couple of bits which are apparently the usual suspects on these bikes it turns out that the previous owner on replacing coil had wired it up again wrongly So couple more things[speedo cable for one]to do then I can take it for mot.Here's hoping

[EMD]

Good news  Is this the beast :



Looks very similar to the yamaha equivalent .

[BazaJT]

That's the one EMD.Mine is black[does this make it faster-like Omegas?] Apparently engine/gearbox are based on a Suzuki unit,so I'm told anyway,but willing to learn different if that's not the case.