|
|
Post by Elektrey on Jun 5, 2015 14:15:08 GMT -5
Just tested the ignition coil and got a reading of 0.5 ohm which I read was normal for it.
I also question the "service manual" as it's not exactly for this scooter and some of the parts are quite different.
Might just replace the spark plug boot and CDI and see if that fixes it.
|
|
|
|
Post by Elektrey on Jun 5, 2015 16:08:11 GMT -5
Ok I just tried the starter motor again and still reading no voltage from the excitor coil.
tried reading resistance from the excitor coil and instead of the insanely high resistance I got nothing couldn't get a reading I think it's finally went.
so it looks like my game plan is:
1.inspect/replace/repair stator
2. replace spark plug boot.
I've got questions about 2.
I. My model takes 5kohm plug boot right? specs were a "standard" 5k-7.3kohm so I'm assuming so.
II. Is there a special way to take it off the coil? I can't figure it out, it looks like it's permanently affixed to it and won't budge. May have to buy a new coil.
III. If I do buy a new coil, are they universal?
|
|
|
|
Post by Jwhood on Jun 5, 2015 16:58:18 GMT -5
Its just bolted too the frame,then unplug spark plug and wire,put new one on bam!!!
|
|
|
|
Post by Elektrey on Jun 5, 2015 20:22:25 GMT -5
Its just bolted too the frame,then unplug spark plug and wire,put new one on bam!!! Yeah but how do I get the spark plug boot and wire off of the coil? It's like its stuck onto it or something. Does it just pull off? |
|
|
|
Post by Elektrey on Jun 5, 2015 20:47:13 GMT -5
|
|
|
|
Post by 2TDave on Jun 5, 2015 20:57:52 GMT -5
Its just bolted too the frame,then unplug spark plug and wire,put new one on bam!!! Yeah but how do I get the spark plug boot and wire off of the coil? It's like its stuck onto it or something. Does it just pull off? Twist the wire. It screws in. |
|
|
|
Post by Elektrey on Jun 5, 2015 21:31:27 GMT -5
So I got the spark plug connector and the wire off. tested the connector and somehow I got 5 kohm, right on spec! tested wire and got 0.3ohm (multi wasn't zero'd out so basically no resistance)  so, coil at fault? Is it possible the stator went and damaged the CDI/coil? any help would be appreciated ^_^ |
|
|
|
Post by 90GTVert on Jun 5, 2015 21:33:43 GMT -5
Common twist-off style : youtu.be/4s0WHJTOReQ?t=1m57sEDIT : You posted as I was finding that. If you were checking the whole assembly before, you were not checking just the plug and wire. The coil was contributing to your resistance reading. Doesn't the manual give you specs and show primary and secondary resistances for the coil? At this point I'd be worrying about the stator first. If it's not putting out juice you won't get a spark. |
|
|
|
Post by Elektrey on Jun 5, 2015 21:47:16 GMT -5
Yes I'm pretty confident the stator is at fault here.
the 12kohm reading before was red probe at spark plug cap and black probe grounded to the bike, so I guess the coil was influencing it.
Just checked manual and secondary side of ignition coil should read 8kohm +-10%.
Went out and checked it and got 6.85Kohm, which explains the 12kohm before (7 secondary side + 5 at boot)
I'm going to pick up longer bolts for the flywheel puller tommorow so I should have the stator out.
Is 6.85Kohm close enough to the spec of 7.2Kohm to work?
Thanks for the help and sorry about the confusion before, I had no idea how the ignition system worked but I have a better understanding now.
|
|
|
|
Post by 90GTVert on Jun 5, 2015 21:54:15 GMT -5
Sounds close enough to me, but then I've never had tons of luck with manual specs for resistances being totally accurate to what will and won't work.
|
|
|
|
Post by Elektrey on Jun 5, 2015 22:22:19 GMT -5
cool. another thing I have no idea about:
the manual shows spec resistances for the lighting, charging, and ignition coils on the stator BUT the picture shows a 4 coil and I'm pretty sure its refering the 4 coil.
How will an 8 coil stator relate to the resistances?
they are if you need them:
light: 760 ohm
charge: 970 ohm
high voltage: 224,000 ohm / 224 kohm
what I tested:
light: 1.0 ohm
charge: 1.0 ohm
high voltage: disconnected / n/a
One note, on the manual it says "Testing Range X1K-Ohm" and that's what I wrote for the specs, is it possible that line is a mistake?
If it's a mistake then it would be 0.76ohm and 0.97ohm which are pretty close to what I got.
|
|
|
|
Post by Elektrey on Jun 6, 2015 12:35:28 GMT -5
Well after getting longer bolts I got the flywheel off. bent the washers I was using but it came off. I think the threads for the fan are shorter, so when I installed the longer bolts I accidentally screwed into part of the stator.  Now my options: have this one replaced find one that can replace it replace with 4 pole stator? How would the 4 pole TGB stator compare to this one? I replaced the instrument panel with an aftermarket speedo assembly so it probably draws less power but not sure. |
|
|
|
Post by Elektrey on Jun 6, 2015 15:12:11 GMT -5
Here is the stator with the black silicone removed (mostly)  orange is charge/lamp coils. Still not sure how they are wired. red is the excitor coil. the two leads come out on the right side and the wire coming out of the stator is on the left of those 2. I tested resistance in the excitor coil using the leads, thinking they may have broken off, but still got no reading no matter how long I tried. Also I just noticed that the tech bulletin does not apply to my scooter. it reads: Scope: All two stroke 50cc and 90cc engines (besides 50cc and 90cc R50X model) ok so the orange pin on the right side is ground I've figured out. Also the left red pin and the center rid pin are connected which makes sense. |
|
|
|
Post by Elektrey on Jun 6, 2015 18:09:05 GMT -5
Ok so I've figured out the paths of the coils and everything seems to add up EXCEPT the point where the excitor coil starts and ends, its not continous. Going to have to rip off that tape and see if I can find the break and possibly rewrap it. I'm figuring the lamp and charge coil are good as they are both reading about 1 ohm which subtracting the 0.4ohm internal resistance is 0.6ohm. The lights did start to come on when I hit the starter motor before so I don't think there is issue there. The lamp coil is 6 of the coils and the charge coil is basically the lamp coil + an extra coil. The excitor coil is obviously the one in black. Jwhood you said you had the same problem, can you test your stator in the same way and see if you have the same issue or what your readings are? PS: I hit up harry @whidbeyisland and he sent me this: www.peirspeed.com/Cobrasales/docs/TSB/Bulletin%20R50X%20STATOR%2020060817.pdfI'm going to contact TGB and see if they would send me a new part as the one that is installed is "faulty". It seems car recalls don't expire, so why would a scooter be any different? They should stand behind their product. |
|
|
|
Post by Jwhood on Jun 6, 2015 19:57:39 GMT -5
That was cool for harry to send you that bulliten about the tape,see how that differs on the one I gave you I don't have engine hooked up but soon as I have time I'll post my readings even if you get it fixed before I get readings for you,as I'm recalling I think my stator has black tape not the blue so most likely mine is faulty,if you get a replacement stator from tgb let me know so I can contact the so I can get a new stator
|
|
