taco eater :
Ascoute, Zeros from Toledo, OH United States
The M1 uses the same style output shaft, as the M101, so this is what ya need. I found this helpful when rebuilding my M1, I broke the non-tapped m1 main gear, swapped to an M01 clutch bell and main gear, aka my internal gearing was all wacky, by switching from a 13t front sprocket to the 11t it corrected my odd gearing situation, hope this helps!