Lookyj,

Installing pinion on motor:

BE CAREFUL,, before you put the pinion on the motor shaft, first mount the motor to the heli frame. You have to mark the shaft with a reference line to see where the pinion will go on the shaft and best align with the main shaft gear. You don't want the pinion to high or to low on the shaft, otherwise you won't get full mesh with the main gear. Because, once you get the pinion on, you can't get it off unless you have a pinion puller(thingy). It is a tight press on fit.

I used my vise out in the garage, you almost need three hands to do it, but I did it with only two. Make sure that the pinion is aligned with the shaft and slowly, ever so slowly, start to tighten the vise. Once you feel that there is some tension there, double check alignment of the pinion on the shaft. Once, the pinion starts to move onto the shaft, it's pretty easy twisting from there.. Just apply pressuse slowly and don't forget to check your reference mark for location of pinion on the shaft. That's key, cuz you can't do it over.


Gosh, I hope this helps,

Dave / Choppersrule