Rotor Winding Tooling

Nice guy !:mad: You must have bought the last one. "Not in Stock: is what I get with that link. They do have a "Let me know when next box shows up" option on that page so I put in my email address!
Sorry.... :(
 
Jim what was the temperature of the rotor after full fielding it for 2 hours?
Just a thought you might want to use a power supply that can be adjusted to 15 volts and see what the temp is then. Something else that might be interesting is to check amp flow on yours compared to OEM.
At the1hr. mark I stopped the test to do a quick video. Was at 137° F when I stopped. Power sup. maxes out at 14v. Amps on test rotor was about 2.5..... right about where Ohms Law says it should be. Here's the video...

 
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OK... so first 2hr. run at 14v.... 160°F on the sides and 139° on the slip rings. It pretty much stabilized after a little over an hour.
15 min. gas and pee cool down temp is 135° on the sides and 116° on the rings.
Back on the road for another 100mi.
Read the directions on the temp gun. :rolleyes: Temp in video is prolly not accurate.:confused:
 
Good on the heat test, Jim.
Thinkin' out loud here.

From ambient to full heat, about a 100°F differential.
That's in an open environment.

On the bike, enclosed environment, summertime, somewhere about 230°F.
Add the 100°F differential, gets 330°F.
(Not an exact science, just diddlin')
It's within temp range for the epoxy.

Calculate the increased resistance of the coil.
I think you can add the resistance differential, plus a bit of fudge.
What was that? 5.2 ohms up to 6.5 ohms? Added 1.3 ohms?
Fudge it up to 1.5 ohms, add to that 6.5 ohms, gets 8.0 ohms?
At 14v, 8.0 ohms, gets 25 watts,
down from initial cold values of 14v, 5.2 ohms, 38 watts.
25/38 = 65% of cold value?

Worst case stuff.
If charging system isn't fully taxed, expect lower temps, lower resistance...
 
You are correct. He's testing worst case scenario.
You mean just on the chance I was to buy one of those rotors?

But then the xs650 I used to pull the sidecar I rode to work for many years ran as a total loss electrical system! Had a small car battery in the sidecar and when signals started getting slow I'd put it on the charger over night and be good a several more weeks!
 
Just finished a 10hr. continuous burn on the rotor. Started this morning at 67° and 5.1 ohms.... Rose to 157° in about an hr. Never changed after that. As soon as I terminated the test, coil was at 6.7 ohms. I think the only way for an honest longevity test.... is to just use the damn things.
 
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