start shaft play help please

[hurricane21]

I just whant to say thanks in advance for any help
I got a knight sport with a tt-50 motor the helli vibes a lot from idle to hover there is a visibble vyb problem i notice that the stert shaft have a little play up and down and some side ways is this has any thing to do with the vyb or the vyb produce this play sorry for my english but i am from costa rica and our native language is spanish thanks for any help

[jontherooster]

I had to find a washer for the Sport & also for the 3D to get all the slop out without binding. They should have had washers,, but didn't.:dontknow

[eyeflyhelis]

how old is the heli? the old shafts wore you may need to replace it. if you do stick a new bearing in it also. easy fixes.