Stovie
2nd Class Ticket
...living the dream since twenty 13!
Posts: 32 
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Post by Stovie on Aug 25, 2015 6:21:31 GMT
howdy. Still fighting to get my T5 back on the road. After original stator issues due to a stuffed bearing causing rubbing, damaging the stator. This is now fixed but out of 3 stator I have I cannot get a spark. So the question is can I test and confirm a stator in or out the scooter? I have seen various suggestions but totally lost. Looking for laymans instructions to test if anyone can help.
PS. I have seen bits in posts around the site, but as say, have confused myse
f reading some of the threads.
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Post by sime66 on Aug 25, 2015 8:12:25 GMT
In simplified form, you can just test the LT (gren) coil and pickup (red) coil, with multimeter reading Ohms as follows:
Check Resistance between green and white wire, should be 500 +/- 20 ohms.
Check resistance between white and red wire, should be 110 +/- 5 ohms.
There's the AC coils test too, which is covered elsewhere on the forum, and some variance in resistance figures quoted above, but those two above are the first simple coil tests.
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Stovie
2nd Class Ticket
...living the dream since twenty 13!
Posts: 32
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Post by Stovie on Aug 25, 2015 16:33:15 GMT
Thanks Sime.
Reading the following but still no Spark (although changed HT lead and CDI, confirmed working on another scoot):
White - Green : 499
White - Red : 111
Red - Green : 609
Also tested wires from end to stator base, not sure if worthwhile exercise or not, but readings are:
White: 0
Red : 111
Green : 497
Not sure if there is anything else worth checking or just getting new stator/recond....?
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Post by sime66 on Aug 25, 2015 17:15:51 GMT
Those stator readings look OK to me though, so I don't think replacing stator will fix it.
I haven't read your recent posts on this subject - been out enjoying the scoot lately, rather than on here.
I'll catch up later on, but I'm sure the clever blokes have already thought of more possibilities than I could come up with....
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Post by vespasco on Aug 26, 2015 18:41:06 GMT
If you can test these things on another scooter then also try swapping the flywheel, spark p!ug and cap. I think thats as much as you could swap before ypu need to check for a short, possibly on your ignition. Try leaving off the end green wire on the cdi, to se if you can rule out the wiring from the cdi onwards....
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Stovie
2nd Class Ticket
...living the dream since twenty 13!
Posts: 32
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Post by Stovie on Aug 26, 2015 20:14:48 GMT
So sourced a stator of a bloke I know. Stuck it in and fired up...hurrah...alas no. Now it runs flat, no power at full throttle....sluggish and un responsive. 'Sigh'
Thanks Sime for letting me know your out enjoying the scoot...lol
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Post by sime66 on Aug 26, 2015 20:55:49 GMT
Flywheel magnets? - checked, holding a big spanner? or as vespasco said, in another scoot?
Fired up easily? Good (bright, fat) spark or just enough to start?
Did you actually go for a run with the CDI, HT etc. in the other scoot, or just fire it up to check it worked?
I know it's frustrating - I spent all of 2014 in the pits - wasn't doing much LOLling then.
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Stovie
2nd Class Ticket
...living the dream since twenty 13!
Posts: 32
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Post by Stovie on Aug 26, 2015 22:06:04 GMT
Yeah checked Flywheel with spanner as suggested...feels decent, good magnetism (or guessing it is). I have taken the CDI/HT lead from a PX i have (bit of a rat but runs)...so confident in those. Spark looked good, bright. Someone has mentioned maybe the engine seals, but stuck new ones in when changing bearing...maybe not got them right, but looked decent when going in. Also seen conflicting suggestions where dodgey seal generally has the engine running fast. This is bogging down, maxed about 10MPH at full throttle...  |
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Post by vespasco on Aug 27, 2015 18:29:02 GMT
Bogging, unresponsive - Check the timing. It could be too far retarded. Check it with a strobe etc.
Its posible it could be the seals but thats a worst casse scenario really. Have you checked the gearbox oil for petrol?
If youre still getting a strong spark when its running bad id rule out the electrics
Do you have the right size jets in carb etc.
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Post by henri on Aug 27, 2015 18:34:02 GMT
as vespaco says ,strobe ya timing , am waiting for my "doh" moment ,when ya say it was so n so , an i sit back n think "why didnt i think of that" , sorry not much help , H
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Post by pxguru on Aug 28, 2015 5:08:57 GMT
Stovie, Now, you are really sure the piston isn't in upside down?
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Post by henri on Aug 28, 2015 9:04:20 GMT
i did think that myself pxguru , but stovie seems to know his way round a spanner so didnt ask ,an that it actually starts would point to it being right way , but might be worth a peek up ya exhaust port , if ya see a piston cut out its a classic DOH moment , weve all done it , H
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Post by kidda on Aug 28, 2015 21:12:04 GMT
I'll hold me hands up haha
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Post by vespasco on Aug 29, 2015 8:39:58 GMT
Oh shi
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Post by ben1987 on Aug 14, 2019 20:09:19 GMT
i have a problem in another thread my vespa broke down on my way back from m.o.t and wont start again i changed the spark plug as was getting no spark to no joy i have took readings from stator which read :
white to green: .490
white to red: .90
is there a way to check cdi if these readings are ok?
sorry to crash your thread and thanks in advance.
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Post by scooterg on Aug 14, 2019 22:01:38 GMT
Remember to put spark plug onto frame to earth it
If it’s jus5 hanging it won’t spark,,ps thread 4 year old
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Post by ben1987 on Aug 15, 2019 9:31:53 GMT
thanks ace face i did try that but still no spark taking that and my readings do you think it could be the cdi or something else? thanks again
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Post by ben1987 on Aug 15, 2019 9:33:36 GMT
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