450X Stripped Main Gear

[PaulCo]

Hello All,
Stripped the main gear on my 450X, - is there usually a cause for this or is it just wear n tear, heli has done 130 flights, I have a spare but was wondering if I should also replace other parts while at it - bearings/belt ??

Thanks
Paul

[JWhitby]

Main gears will strip if the mesh is poor for some reason.
I stripped the main gear on my 450x when pulling out of a loop. There was excessive play in the motor top bearing. After mine hit the dirt I googled and found that this is a known issue with the stock motor. The inner bearing race doesn't grip the shaft but wears it out instead unless you loctite it. https://www.youtube.com/watch?v=gZIa67Aa3eQ
Check the can on your motor, can you move the pinion away from the main gear just by rocking the can?

[PaulCo]

Main gears will strip if the mesh is poor for some reason.
I stripped the main gear on my 450x when pulling out of a loop. There was excessive play in the motor top bearing. After mine hit the dirt I googled and found that this is a known issue with the stock motor. The inner bearing race doesn't grip the shaft but wears it out instead unless you loctite it. https://www.youtube.com/watch?v=gZIa67Aa3eQ
Check the can on your motor, can you move the pinion away from the main gear just by rocking the can?

Thanks JWitby, My stock motor failed after 30 or so flights, have got a eflite 450 3600kv in, seems a great motor.