130x tail roter issues

[kensrichard1]

I have a blade 130 Xthe gear from the main shaft fell off for the tail rotor. I put it back on and it seems to not stay there what am I doing wrong

 

[Rolex]

http://www.horizonhobby.com/pdf/BLH3780-Manual_EN.pdf

See page 16. You have a shaft driven tail, and the gears are pressed onto a crimp, or spline on the ends of the shaft.
Most likely the inner hub has stripped on the gear that comes off and needs to be replaced.

 

[kensrichard1]

Ok thanks. do they sell those gears and metal

 

[Rolex]

Sure. Check Horizon Hobby or Ebay. Just look up the make and part #.