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This is the only slot brush conversion MG motor i have ever come across, sourced from an ex-MG and Yokomo team driver Ian Oddie. It has some beautiful endbell detailing, as per the occasional Trinity slot conversions, and the Sagami lettering on the endbell is also pretty uncommon. It is the early Yokomo design endbell. I am still researching the Sagami lettering but not finding too much. I know Sagami made motor components for loads of people but i have only seen a couple like this. The wick endbell MG i have has the same early Yokomo endbell.

I sent it off to motor guru Glyn Ward who opened it up for a service. The inductance test of the arm it had in it indicated that it was a 14 Single which was a real surprise considering the age of this motor. I was expecting it to be a mild wind really. It is a reverse-stack armature also. Magnets were strong, there was virtually zero wear on the comm and the magnets were perfectly centralized.

Performance on the dyno was pretty good, with 36,000rpm with a low amp draw of just 2.75amps.

At one point it was pretty much Sagami (for Yokomo) and Tokyo Mechs (trinity) as rc car motor base component manufacturers from what I understand. There had to be some others but those were the two top companies. I'm not sure where Air Supply (CAM, Wimpy) came from, for example.