Going from 60 to 91

[tnreefguy]

I presently have a ys st2 61 on my freya. I would like to put in a ys 91. any mods you would recomend. allready have the push pull collective upgrade and the metal one way hub. Any help will be great.

[keith shaw]

You'll definitely need to change the gearing ration to 8.45 or in that range. Hirobo offers the delrin main gear in 93 or 95 T and pinions @ 10T, 11T or 12T. 8.45 is the 93T main w/ 11T pinion. Hope this helps.
Keith :glasses2:

[blakka_1]

I hear that the third bearing block is a worth while upgrade when moving the Freya up to a 90 spec. :)

[pilotError]

Metal Auto Hub.

[rob_jones]

I did the exact same thing with my Freya. I added:

414220 - Collective Push-Pull
404716 - EX One-Piece Engine Mount
414229 - Metal Auto Hub
414222 - 11T Pinion (already using a 93T Main Gear)

It already had the 3rd bearing block when I got it, but I would've added it if it didn't.

[tnreefguy]

Thanks I already have the gearing to make it work. All I am going to put on now is the Third bearing block.

[3Dgonnabe]

While you have it apart, check the auto hub bearing. Unless its particularly new, it would be worth changing it as they have a habit of cracking across the case unless you have the metal hub.

Cheers

[tnreefguy]

Well I installed my third bearing block and my autohub that I already had still looking for a 91 but everything looks good.