Tekin 1550kv Truggy motor
 

I had a problem with this motor today and was wondering if anyone had any idea what could be wrong. I ran four packs last week and no issues, ran one pack today and no issues. Then on my second pack it seemed like the battery died sooner than normal and the motor was hotter than normal, temped at 183 degrees, normally it temps between 150 and 160.

I also felt some binding like a gear mesh was way too tight or the driveline was binding. Gear mesh was perfect, pulled the pinion off to check the driveline and it is smooth as silk. I have been running this motor for awhile now and loved it until today.

So looking at it closer it looked as if the pinion had moved closer to the can, it did, it was rubbing grinding a slight groove in the top of the can. Fixed that and put another pack in. Buggy felt fine, but at about the 15 minute mark it felt like my brakes were gone, and again the battery dumped a little sooner than normal.

When I pulled the body off this time the esc fan was on, the battery was pretty hot and the motor temped at 220 degrees. Again I felt binding, pulled the pinion and it was the motor, really hard to turn. Once it cooled to room temp. the motor was easy to turn again.

Here's what I'm wondering, since there are so few moving parts what would be doing this. I put a set of high quality ceramic bearings in it a few weekends ago, my guess is they must of taken a crap.

My setup:
Hyper 9e
5s Hyperion 30c LiPo's
MMM, conservative settings, settings I've always ran with great results.
Tekin 1550kv Truggy motor.

So since it temped at 220 and the brakes felt non-existant I would imagine it demaged somewhat. So for a replacement motor, well not sure on another Tekin, and I just sold a freakn brand new Medusa 36-70-1600kv yesterday, which I knew I should have kept as a backup.

Thanks for any help.

Yep...sounded like you demaged the motor a bit...especially when you hit the 220 mark.

Send it back to have them work on it. Their tech support is excellent.

Upon further inspection, I decided to take the front plate off and check the bearing. Bearing is perfect, no play and smooth as glass, so I pulled the rotor out to check it. Well the kevlar or whatever, fiber wrap around the rotor is pretty badly frayed and separating from the rotor. I had a 60mm Medusa do this once, they replaced the rotor and good as new.

What rotor do you have in your motor? Do you have an aluminum spacer on the pinion side?

Yes, there are aluminum spacers on both sides of the rotor magnet.

One spacer is almost pully shaped. This should be on the pinion side of the rotor...

I'll post a picture once I get my POS computer to work. The spacers on the rotor are like a sleeve, just slightly larger inner diameter than the shaft so they fit over it and, I don't know, about 10mm long.

thats the old version then

That is the old version. Please contact support@teamtekin.com with your full contact info and shipping address so a new rotor can be mailed to you.

Ok, sent the email with a couple pictures. Thanks for your help.