F3S soft rear suspension resolved by air assist of my own design.

[Coolvirgo54]

To overcome the soft rear suspension on my F3S when loaded or at high speed I installed air assist of my own design. I did use an airbag top mount plate from an RT as the mount holes were already there in the F3S frame.

 

[Mikey]

There you go, good job with thinking out of the box!!!! A nice aftermarket shock would have cost you a little more, but that will work!!

 

[troop]

I'm sure nice improvement, but those OEM F3S shocks are weak. You might be a bit more satisfied with your setup if you buy a used occasional two up shock. They can be had for pretty cheap.