New Rider
Currently Offline
Posts: 15
Likes: 0
Joined: Oct 21, 2015 12:58:33 GMT -5
|
Post by g2kmobile on Nov 7, 2015 8:19:39 GMT -5
The thinner red wire looks good. I'm going to some thorough testing today with my multi meter.
I did a continuity test on the right side brake safety switch and I get a beep with the brake lever squeezed and not squeezed. So that may be part of the problem.
The stator has a 3 prong connector with a green, white, and yellow wire. If I put the ground multi meter lead on the green stator wire, both the green and yellow wire get a beep on the front connector. This connector plugs into the voltage regulator. I'm not sure they both should be getting a tone, could be an internal short???
|
|
New Rider
Currently Offline
Posts: 36 
Likes: 6
Joined: Sept 15, 2015 5:55:30 GMT -5
|
Post by cato on Nov 7, 2015 8:45:08 GMT -5
maybe this issue has been resolved, but the first thing I always check is the compression
|
|
New Rider
Currently Offline
Posts: 15
Likes: 0
Joined: Oct 21, 2015 12:58:33 GMT -5
|
Post by g2kmobile on Nov 7, 2015 9:00:40 GMT -5
Compression was already checked. The scooter is has 118 - 120 psi of compression. Not bad for a 50cc motor  |
|
New Rider
Currently Offline
Posts: 36
Likes: 6
Joined: Sept 15, 2015 5:55:30 GMT -5
|
Post by cato on Nov 7, 2015 9:38:43 GMT -5
size doesn't determine what a compression should be. in fact, smaller engines can take higher compressions without detonation.
if it was 120psi though, that's not too bad and should be ok, but it is on the low side.
I prefer 150 to 180 psi, but you've got to run premium gas
|
|
New Rider
Currently Offline
Posts: 15
Likes: 0
Joined: Oct 21, 2015 12:58:33 GMT -5
|
Post by g2kmobile on Nov 7, 2015 10:33:07 GMT -5
Yeah, everything is relative. The motor has been used as a daily driver for just about a year, and the customer weighs about 350 lbs, as well as carrying about 40lbs worth of stuff with her everywhere she goes.
SO...120 psi of compression after a year of use, is relatively, good. Especially considering that maintaining 30 -35 mph requires 75% - 100% throttle, every day, every ride, every where...poor little motor is holding up like a champ I would say...lol
The harness connector is disconnected from the stator on the back end and disconnected from the voltage regulator on the front end...Negative MM lead to battery ground, red MM lead to green, white, yellow wires produces continuity tone.
Does that sound right?
|
|
New Rider
Currently Offline
Posts: 36
Likes: 6
Joined: Sept 15, 2015 5:55:30 GMT -5
|
Post by cato on Nov 7, 2015 12:43:05 GMT -5
stator resistance is tested in ohmage and not just with a continuity buzzer.
parts for these things are so cheap, it's more economica to change parts rather than spend labor time diagnosing things.
|
|
|
|
Post by tvnacman on Nov 7, 2015 14:20:50 GMT -5
On single phase stators they have a few ohms to ground(green wire). I suggest to do a running voltage test to check a stator. If your unsure how to do this, be sure to tag me or pm me to the thread.
120pis compression is marginal for them to run, squirt two table spoons of oil in the spark plug hole. that will help bring up your compression up. It should run after provided everything else is correct.
John
|
|
New Rider
Currently Offline
Posts: 15
Likes: 0
Joined: Oct 21, 2015 12:58:33 GMT -5
|
Post by g2kmobile on Nov 7, 2015 22:05:48 GMT -5
There is no labor charge for these services being performed. I can get the scooter to start/run just fine by grounding across the solenoid terminals. I unwrapped the wiring harness and changed the stator to a known good stator. The horn switch passes a continuity test, and the horn blows load and proud when wired direct to the battery. Yet I get nothing when I press the horn button???  I'm calling it a night, and I'll pick back up tomorrow.  |
|
New Rider
Currently Offline
Posts: 15
Likes: 0
Joined: Oct 21, 2015 12:58:33 GMT -5
|
Post by g2kmobile on Nov 9, 2015 23:18:45 GMT -5
OK...I now have a fully functional electrical system. I can now get back to fixing the original problem of deceleration backfiring.  I am going to clean a 150cc carb, as it has slightly bigger jets, and see if I can tune out the backfiring. Any recommendations on a particular jet size? The scooter is basically stock except the PAIR system has been removed and the previous owner gutted the muffler for "performance" reasons. |
|
New Rider
Currently Offline
Posts: 15
Likes: 0
Joined: Oct 21, 2015 12:58:33 GMT -5
|
Post by g2kmobile on Nov 10, 2015 20:52:55 GMT -5
OK...The problem seems to be corrected. Scooter will hold and maintain a consistent idle, and also have no hesitation/stumble at just off idle all the way to WOT, with no backfiring.  For anyone else that might read this, the issue(s) were. 1) Float was either not sealing or... 2) A/F mixture screw was installed wrong (the O-ring and flat washer go on the head end of the screw NOT the pointy end) 3) The muffler was swapped out with a known stock working muffler (this completely took care of the backfiring just by itself) I have a few more electrical gremlins to dispatch, but otherwise, this scooter is now fully operational. Thank you all for the help and support, this has been a most challenging endeavor.   |
|
|
|
Post by JerryScript on Nov 10, 2015 22:15:38 GMT -5
Good job, glad to hear you got it running!
|
|
