moyo64
1st Class Ticket
Posts: 70
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Post by moyo64 on Sept 12, 2012 18:34:16 GMT
Hi all i have a vespa mark 1 px 125 1978 I have just fitted a new staor and when she gets warm she is still misfiring Any Ideas please ?
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Post by sbwnik on Sept 12, 2012 19:24:43 GMT
Did the stator come in a box marked 'Swiss'?
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moyo64
1st Class Ticket
Posts: 70
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Post by moyo64 on Sept 12, 2012 20:48:12 GMT
Hi No it game bubble wrapped from beedspeed. It has all the genuine markings on the rear,ie piaggio etc
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Post by sbwnik on Sept 14, 2012 13:10:42 GMT
Does it have the two timing marks? If so, next stop is CDI.
Ironically I was going to ask if it came from Beedy if it was a Swiss.
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moyo64
1st Class Ticket
Posts: 70
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Post by moyo64 on Sept 14, 2012 15:48:48 GMT
Hi yes it has two timing marks ? The cdi is breand new as well ? Regards
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Post by sbwnik on Sept 16, 2012 21:08:34 GMT
Next port of call is the plug and cap. Change the plug first. As it's only an issue when warm, it's not timing or woodruff related, and doubtful to be fuel unless it's getting a blockage somewhere. Next time it starts farting about, hop off, keep the engine running if you can, pop the seat up (don't lock it for now) and remove the tank cap. Rev it hard and see what happens.
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moyo64
1st Class Ticket
Posts: 70
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Post by moyo64 on Sept 17, 2012 13:16:30 GMT
HI Ive put a new lead cap and plug on her when i changed the cdi. The plug is a chocalate brown colour which i belive means thats all ok ? I will do as you say on the petrol cap but what am i looking for ? Regards
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Post by kru251 on Sept 17, 2012 17:44:39 GMT
Less looking for, as opposed to listening. Removing the petrol cap when running would prove that there isn't a blockage in the fuel tank venting system. How? If the scooter suddenly runs again OK when the petrol cap is removed (exposing the tank to ambient air pressure with a possible slight hiss as it's removed) then there's your problem. Cheap check anyway!!!
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Post by sbwnik on Sept 18, 2012 19:31:14 GMT
Thanks.... yes 'listen' for is a better call.
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moyo64
1st Class Ticket
Posts: 70
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Post by moyo64 on Sept 20, 2012 12:51:35 GMT
Hi Ive done the test as you said on the petrol cap,but didnt hear anything, Could there be any other reason why its missing when warm and also running like a crock of s**t regards
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Post by sbwnik on Sept 20, 2012 20:25:33 GMT
Yes, either the stator or the CDI is getting hot and hating it. That's all I can think of.
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moyo64
1st Class Ticket
Posts: 70
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Post by moyo64 on Sept 21, 2012 18:05:24 GMT
Hi I have put a new cdi and stator on it ?
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Post by sbwnik on Sept 21, 2012 19:11:18 GMT
Have you tried disconnecting the green wire that runs up the frame? You'll need to stall the engine to kill it, but it's a good test for continuity on that wire. I assume you have cleared the jets and checked the carb out properly?
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moyo64
1st Class Ticket
Posts: 70
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Post by moyo64 on Sept 22, 2012 7:50:25 GMT
OK will try that. i will strip the carb down today and give it all another good clean Will let you know how i get on Thanks
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Post by mudge79 on Jul 30, 2014 16:27:54 GMT
Nick, whats the common probs with the swiss stator plates? I have one and i think it could be the cause of my problems. Cheers chief.
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Post by shipscat on Jul 30, 2014 18:06:09 GMT
i fit a stator plate from beadspeed for a p150 not so long ago the cdi trigger pick-up rubbed on the inside of the flywheel how i found it remove spark plug to ease turning of engine by hand remove flywheel and mark lines with a sharpie marker pen across the the inside of the fly wheel same as a clock 1 2 3 etc refit flywheel and torque up , turn fly wheel by hand a few revolutions then remove flywheel and look at the lines of ink from the sharpie you have marked if something is rubbing it will "scratch" the ink i had to loosen the screws on the pick-up move it little i don't remember what make of stator it was but it wasn't in piagio packaging this may help
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Post by sbwnik on Jul 30, 2014 18:36:11 GMT
Mudge, the Swiss ones can be OK, but the soldering on most of the ones I've seen has been suspect, and the pick up on the last one I had died within six months.
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Post by henri on Jul 31, 2014 19:29:09 GMT
i inspect all new stators soldering as a matter of course nowadays , as were it came from doesnt guarantee much, you say "its still misfiring " , was the misfire the reason ya swapped stators in first place .H
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Post by coaster on Aug 1, 2014 14:21:13 GMT
Have you tried disconnecting the green wire that runs up the frame? ......... but it's a good test for continuity on that wire. Just to be clear, that green wire is used to kill the engine by shorting the stator feed to earth via the ignition switch or kill button. If you didn't have continuity, you wouldn't be able to turn the engine off. Removing the wire is a good test though as it removes any possibility that the green wire is shorting to earth or that the ignition switch insulation is breaking down. I don't know about Vespa switches but this is a common problem with Lambretta ignition switches sourced from India
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Post by vespasco on Aug 1, 2014 16:30:40 GMT
Is the timing correct? Has the carb been set up when the engine was warm? What was the reason for changing stator? (H
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