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Old 03-09-2007, 12:03 PM   #1
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Default Positive Wire comming unsolder on Checkpoint motors

Any one have a soulition I have change to 12 Gauge wire on Positive wire and did the negitive side as well. Still have the same problem. Also went with kestler solder. ? I am at a loss.
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Old 03-09-2007, 12:08 PM   #2
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how hot is your motor? you might be over geared,or the motor might be a dud,I had this happen to me,on my xx4.i switched pinnions,for diff ratios,i cut vent holes in the body,but nothing helped,it was the moter,it was built badley,or something. hope this helps
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Old 03-09-2007, 01:31 PM   #3
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Motor is only 145 running cool. I was told to cut holes in Body to vent a little more. Next thing to try. Problem is in the 4wd had it happen in the BJ4, XXX4 and XX4and a Lazer ZX-5.
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Old 03-09-2007, 01:43 PM   #4
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have you tried scuffing up the mounting point for the wire on the checkpoint motor? do that, tin that point, and make sure the wire you are using has solder properly been put to the wire. sometimes you get what you think is a good connection, but the solder didn't join up correctly.
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Old 03-09-2007, 01:46 PM   #5
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We will try that. The whole solder joint came off the tab but did not scuff it. I just wonder it a copper tab would be better on the motor.
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Old 03-09-2007, 01:50 PM   #6
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What gauge of wire are you running on the speed controller? If you have 13 gauge or smaller, the chances are more likely to have it come unsoldered. I ran a Q2 with 13 gauge in a BJ4 with a 10 turn with the same problem. Went to 12 gauge and the problem went away.
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Old 03-09-2007, 02:41 PM   #7
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12 Gauge Wire. there is 6 of us having the same problem in 4wd with the Check Point Motor.
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Old 03-09-2007, 02:52 PM   #8
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birdcaged solder joint? How good is your soldering iron? Could not be melting thouroughly. Just a thought. Most likely not the cause.
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Old 03-09-2007, 02:54 PM   #9
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Hey...

I used to have this problem all the time in my BJ4..... put a fan in and it stopped straight away.... seems there is VERY little airflow getting thru... fan made all the difference... i've even managed to gear up....
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Old 03-09-2007, 03:17 PM   #10
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i have had this problem with a few checkpoint motors as well. one was in my 2wheel mod, the other two in fourwheel. wasnt the ventelation or gearing. changed motors, problems went away. contacted the motor company and let them know what i had. sucks but three motors were bad.

i think i just had some bad teardowns. a factory guy i race with had the same problem in colombus. thought it was his new batteries, tried everything until he went and changed the motors.
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Old 03-11-2007, 08:51 AM   #11
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Just to let you know if anyone has this problem we may have it solved. We had to get all the solder off the tab then rough it up used a sanding dremel. Then did add a good size hole for the motor to get more air. Also cut and cleaned the can real good. And it seem to take care of the problem on 2 of our 4wd last night they ran well over 7 6min runs and no problems. Thanks to the help at Banzai and a few of you we got er done and working.

Thanks to all.
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