G oog le BadWeB | Login/out | Topics | Search | Custodians | Register | Edit Profile

Author Message   Rokoneer Posted on Saturday, September 24, 2005 - 04:24 pm:        I'm no EE, tell me what this stuff is that bakes between the coils. It almost looks like it's petroleum based and even though it looks squishy or jelly like it's actually hard. Why does this happen, I mean what causes it? It certainly seems like the Sportster based motors have a higher than usual stator failure rate, why?   Edv Posted on Saturday, September 24, 2005 - 05:46 pm:        Well, mine did that after 47,000 miles because the stator wires rubbed on the frame until the insulation rubbed through and shorted it and I didn`t catch it until it was too late. Luckily the regulator was ok. Follow the leads up to the regulator and see if there isn`t any bare spots along the way that it shorted out on. How many stators have you gone through? Ed   99x1 Posted on Saturday, September 24, 2005 - 08:31 pm:        "...tell me what this stuff is that bakes between the coils." The stuff between the coils is probably the epoxy used to lock the electrical connections at the coils. The stator (on XBs) is 3 phases (3 seperate windings) and the 3 wires are connected under the 3 blobs of epoxy. The largest voltage difference between the coils is at the output, and the epoxy shields the primary oil from cooling those coils as much as the rest, so (IMHG - in my humble guess) stators would tend to burn around the same spots.   Rokoneer Posted on Sunday, September 25, 2005 - 09:50 am:        This is my first stator replacement Ed, but you got 42,000 more miles out of your stator before it cooked. My bike only has a bit over 5,000 miles on it....   Edv Posted on Monday, September 26, 2005 - 05:31 pm:        Rokoneer, Were you able to figure out what caused it to go bad yet? Ed   Rokoneer Posted on Monday, September 26, 2005 - 06:08 pm:        Ed, I pulled it apart and got the stator out and after checking it out it would appear (to my highly uneducated mind) That the epoxy got hot enough to deform/melt and run completely around the winding towers which then 'electrically connected' the towers and burned them out. There is no obvious wear on the stator wiring, either in the engine or out, to indicate that it was a short the way that yours was. Installing the new stator brought the charging voltage right back up to 14.4 volts. With the screwed up stator charging voltage was at 10.1 volts.

Add Your Message Here Post: -Color- Black Red Green Blue Yellow Purple Orange Cyan Gray White -Font- Arial Courier Symbol Times Verdana -Size- Smallest (-2) Small (-1) Normal Large (+1) Largest (+2) Username: Posting Information: This is a private posting area. Only registered users and custodians may post messages here. Password: Options: Post as "Anonymous" (Valid reason required. Abusers will be exposed. If unsure, ask.) Enable HTML code in message Automatically activate URLs in message Action: