was stalling, now doesn't stall due to not running

[russellbowden]

I've got a 49cc 2 stroke (2006?) TGB 101R, so the side of it says.

I've been chasing an intermittent fault at idle and low RPM, I did have spark, but after taking the coil off and inspecting it anyway, I could no longer get any at all with or without plug, (yes the coil is re-attached to the body) after replacing the coil there is still absolutely zero coming from HT lead.. I've checked every plug at least 483 times each and can confirm there's Mcdefinitely nothing loose or accidentally unplugged..

I've been trying to measure the magneto's output, the guy at the bike shop said these magneto's have 2 sets of windings, one to make AC and one to make DC, one type of current to power the electrics and charging system, and one to power the ignition system, I can't remember which was which, but I guess the DC is to the coil? since there's a rectifier behind the dash. Can anyone confirm it's this way around and not AC to the CDI & coil?

The actual questions, and reason for this post is, which wires should I get current from? should it be AC or DC, and how much should I expect at cranking (not running) speed?

There's 5 wires coming from the general magneto area;
1 a blue one from an external pickup, which gives no voltage, either AC or DC with respect to earth or otherwise.
2 a black, which is earth. (connected to the body at the screw of the external pickup near termination of blue wire)
3 a yellow with red stripe 6VAC to earth, this shares a square plug with number 4.
4 a white with red stripe 5VAC to earth, this shares a square plug with number 3.
5 can't remember the colour, but like #3 and #4 comes from behind the magneto but seems to have no potential voltage to earth.


If anyone tells me to try google or the manual I'm going to injure myself.. I've spent hours going through this site, searching google and reading the .pdf manual, even from different sources to try to get a better one, but none of them seem to be of much use, and the circuit diagram of the ignition system is totally unreadable.

I picked this scooter up an absolute steal at only $270 road legal but not running, fixed it and rode it for 2 or 3 days, then decided to make it run "better" and it's not run since.

I hope someone can help, I need this transport to get a job!
Thanks in advance everyone!

[imnts2]

I will try a search of this site. This topic comes up every now and then, use the searchon the top of this page. I recall several very god expanantions of Ac a nd Dc coils and measuring Terrillee had a headache on y=her scoot a years or so ago. Not sure who helped her. But do some searching. Iwil too.
lefty2

[russellbowden]

Yee ha! found it..
The bolts going through the plastic fan into the flywheel were too long and the fan was loose, I tightened the bolts and they went right through and mashed the windings on the magneto's coil.. I had my mate make up a gear puller at work for me to get the flywheel off, un-wound a meter or two worth of broken wire and soldered (pliers on gas stove method) the remainders of the windings back to the terminal, although only outputting 40V AC from black/red to earth, she's all go!

Well for about 2 hrs of riding anyway, now the "new" drive belt's broken.. This is starting to look like motorsport! never mind, at least this will be an easy fix

Thanks for the help!

[edfr]

Yes you have an AC system, easiest way to check is Test the BOTTOM wire on the TWO PLUG on the CDI WITH THE KEY ON. If it registers 12V then you have a DC system the battery is feeding the CDI and not the STATOR.
Lefty