No spark for YY250TT By dpinney (Read 1,604 times)

[dpinney]

I am repairing a Wildfire WFH250T2. The engine looks like the YY250TT. It had intermittent spark that quit after a couple minutes. There is no AC Pulse from the Pulse Coil. Impedance of the pulse coil circuit is only 120 Ohms. The AC Power from the stator is normal for the lights and Voltage Regulator.

I suspect that the spark coil on the stator is bad. Does anyone agree? I have a couple of questions for anyone that has changed the stator. It is obvious that lube lines must be removed and the oil drained. Is it possible to replace the stator without removing the coolant hoses? Is the Magneto cupped in or out? does it need to be removed? Any Suggestions.

This looks like a big job, and I do not want to make it worse by making errors.

Thank You!

[Alleyoop]

Does it look like this the LINAHI motor or the HELIX motor:
Alleyoop



Or do you have this mess.

[dpinney]

It looks like the second picture. Which type is it, the messy one.

[Alleyoop]

Then you have the HELIX VERTICAL 244cc motor. The head is straight up.
Alleyoop

[albracy]

Hello! I hope I'm putting this in the proper place. I looked all over this site to find someone with a bike that looks like mine, well here goes.

I have the same engine as in the photo here. (2012 Jonway YY250T 244cc)

I was having dead batt issues since I bought the bike (brand new) a little over a year ago. So I bought a new batt. and still the same issue. So I checked the output of my charging sys. and discovered that it was not charging AT ALL. I purchased a brand new stator for $90.00 which I found cheaper after the fact on another site. (49.00) My problem is WHERE IS THE STATOR LOCATED? The place I bought the bike from stated that all I had to remove was the muffler and BAM there it is. NOT TRUE. Can someone please help me locate the stator so I can R&R it so I can get back on the road again. (It's been a month of not riding.) Arrrgh

[Alleyoop]

Stator is behind this plate:
Alleyoop

[albracy]

Isn't that the oil compartment? Do I have to drain the oil first to get to the stator?

[Alleyoop]

Yes you have to drain the oil and also put something under there after you drain it because you will have oil dripping out.
Alleyoop

[albracy]

Dughhhhh! Never mind. Although this is my first R&R stator, I think I did pretty good. You would not believe what I found inside the case though. The stator was reallyyyy loose. I took the screws that were holding the stator onto the case out with my fingers! All three screws were that loose. My questions are......... 1) would the loose screws prevent the stator from working? 2) when the case cover came off, a pin and a double gear came out. How exactly do these go back in? Is there a diagram for this section part?

[albracy]

Thank you for responding Alleyoop. Can the stator be tested out of the bike? Is there a test that I can perform with a multi meter to see if it is working? Btw I also noticed that there were scraping marks where the stator was rubbing due to not being aligned. There was also little bits of fine pieces of metal inside too. I hope I can still use the same case cover. Yes or no.

[albracy]

I want to show you what the cover looks like but it will not let me paste the pics in this box. Do you know how to do this?

[albracy]

Found out how to put the pics in!

Attachments:

[albracy]

Photo 2

Attachments:

[albracy]

If you look closely to the right ,you can see the oil plug. There is a piece of thread section that is missing. Also in photo one, the screw chambers mostly all of them are worn down at least 1/3 due to the rubbing! Whoever put this bike together should work in a pet shop and leave scooter building ALONE!

Attachments:

[taildrag]

2008 Roketa 250 54B...3,200 miles...what is a good spark plug to put in the scoot?