rotor-stator rub - ????

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Yes , I had the pleasure of stator eating itself many years ago , made it back to shed under power though .... what a smell when things cooled down enough to open ! One of studs had been broken right out of inner case others bent , stator was just gone , the epoxy or whatever used to cover windings made for very , very nasty air ...
 
Craig said:
Yes , I had the pleasure of stator eating itself many years ago , made it back to shed under power though .... what a smell when things cooled down enough to open ! One of studs had been broken right out of inner case others bent , stator was just gone , the epoxy or whatever used to cover windings made for very , very nasty air ...
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I had a worse scenario. Disintegrated rotor, pieces jammed into the chain. Bang. Broken primary chain, a hole in the inner primary case, sheared off the timing scale, and a bent gearbox main shaft. An expensive lesson.
 
Yes , does sound worse , I had stud welded on but could not get new rotor/stator properly aligned so new inner case needed as well I too lost my scale , new one is in drawer of shed , never found the need to reattach as it looked difficult ,haha! .... lucky for me that was only damage , beside the afternoon of failed welding , new rotor/stator and inner case , some serious cleaning and was good to go
 
Had a similar problem with a newly installed 3 phase system, new rotor and stator. Took me forever to get an .008" gap and that was after reaming the stator stud holes. Did a few test rides (new belt drive also) and opened the primary up every time to check everything over. Happy with everything, I did 130 miles yesterday. Towards the end I noticed my turn signals were blinking very slow. Checked the battery voltage when I got home and had 11.7(!). Tested the new podtronics regulator this morning and it checked out fine so I opened the primary. To my horror, pieces of melted stator fell out. I consider myself very lucky. The stator is obviously garbage. The rotor is scored somewhat, but not terrible. Can the rotor be turned down to clean it up? This would also help achieve more clearance to the new stator. Could the rotor be damaged to the point that it shouldn't be used? I have read about turning the rotor down, but am more concerned about possible damage to the rotor from this event.
 
Brly said:
Had a similar problem with a newly installed 3 phase system, new rotor and stator. Took me forever to get an .008" gap and that was after reaming the stator stud holes. Did a few test rides (new belt drive also) and opened the primary up every time to check everything over. Happy with everything, I did 130 miles yesterday. Towards the end I noticed my turn signals were blinking very slow. Checked the battery voltage when I got home and had 11.7(!). Tested the new podtronics regulator this morning and it checked out fine so I opened the primary. To my horror, pieces of melted stator fell out. I consider myself very lucky. The stator is obviously garbage. The rotor is scored somewhat, but not terrible. Can the rotor be turned down to clean it up? This would also help achieve more clearance to the new stator. Could the rotor be damaged to the point that it shouldn't be used? I have read about turning the rotor down, but am more concerned about possible damage to the rotor from this event.
Click to expand...

Two enemies of a magnet: extreme heat and cold
 
Brly said:
Had a similar problem with a newly installed 3 phase system, new rotor and stator. Took me forever to get an .008" gap and that was after reaming the stator stud holes. Did a few test rides (new belt drive also) and opened the primary up every time to check everything over. Happy with everything, I did 130 miles yesterday. Towards the end I noticed my turn signals were blinking very slow. Checked the battery voltage when I got home and had 11.7(!). Tested the new podtronics regulator this morning and it checked out fine so I opened the primary. To my horror, pieces of melted stator fell out. I consider myself very lucky. The stator is obviously garbage. The rotor is scored somewhat, but not terrible. Can the rotor be turned down to clean it up? This would also help achieve more clearance to the new stator. Could the rotor be damaged to the point that it shouldn't be used? I have read about turning the rotor down, but am more concerned about possible damage to the rotor from this event.
Click to expand...

When you get your new stator, turn down your rotor to give .020” clearance (.040” undersize). Also carefully check your rotor hasn’t started to come loose.
 
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