To get the best out of motor it is best to run then in , when motors are new the brushes are not bedded in to the comm so if you try to pass a large curent through them they will spark, this can then burn the comm, and you will have problems even when they are bedded in passing high current, the way to get over this is to run it in on 2-4 volts nice and slow i would tape my race motots to my lathe bed as a heat sink, and let it run for about 12/ 24 hours depending on how hard the brushes are.

 

with a 700bb you can clean the com with cotton buds and somecomm cleaner, we did use trike but it’s not good for your health, you can also use IPA. dont forget to oil the bearings, do not use WD40 as it will burn on to the comm and stop you being able to pass large currents  running a new motor flat out from new just burns comms.

 

Peter

Hey Ashley. The above sounds like a good reason for changing to brushless motors.

David.

Running a motor in water is not a good idea when we did standard class 12th cars they did that for a bit the problem was that any more than ten seconds and you had no brushes left , it was at the time when all cans where sealed and you could not get at the brush gear, the problem arose when a few shops started selling water dipped motors and they did not clean them out after, they ended up with a lot of rusty motors, at the time I was one of the people that opened and de wound the first 3 motors at an event so I saw what state they where in , another tweak was to give them a bit more advance by putting in a long motor screw till it locked the comm. then give the pinion at twist, this moved the comm. a few degrees and gave it some more advance, the type of motor changed about this time and brushes where accessible and we had a tool that we could check for illegal advancing without striping the motor

Pierre

 

I know the answer………..stick a 10cc engine in.

 

On a serious note what do Graupner advise?

 

Paul