Zagi Motors :
The Zagi's are one of the ~core~ mods , even as base as putting the bearings into a Sherman or Pershing .
Why ? The stock Mabuchi is just that , ~stock~ , ie. toy quality . The Zagi was meant to spin props on what are termed 'park fliers' & 'combat foamies' . They have about the same RPM , maybe a bit less , but a fair bit more torque , especially on the low end .
Example : you eas in the throttle , and the tank goes from stationary into low run with a lurch . Thats the motor struggling to overcome the inertia in the gearbox . The Zagi Will reduce that , and give you a smoother startup , and lower slow speeds .
zagi.com , the grey box in the upper left corner , Price List , the Motors & Props , Motor - Zagi 400 , 6 volt . Price , $8 each .
Now , that said , I see they have a reverse rotation Zagi ... and by rights , one of the motors does run in reverse ... so perhaps one of each is a better choice .
Either way , $16 to $18 plus shipping is worth it , no ?
PS : We did a bulk order as an RC group , 100 motors , and got 'em for $2.50 a pop , but they dinna have reverses then . I got one pair awaiting those Tiger one boxes ...