You allways have to run in a new motor - if you donīt you never get the best out of it. The brushes would thank you for a run in before trying what your tank is able to do (climbing for example) - if they only could speak...
You can ruin a brand new motor by first climbing without a run in !
Ruin means not that it wouldnīt work anymore but the best is gone for ever...
beetyii
